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Steel tubes for machining Seamless hollow bars for machining Steel grade · 20MnV6

Categories Alloy Steel Seamless Pipes
Brand Name: Best
Model Number: 40mm--360mm
Certification: API/CE/ISO/PED
Place of Origin: China
MOQ: 1 Pcs
Price: 500 usd/ton
Payment Terms: L/C, D/A, D/A, D/P, T/T, Western Union, MoneyGram
Supply Ability: 100000 Ton/Year
Delivery Time: 30 days normally, according to order quantity
Packaging Details: 30 days normally, according to order quantity
Standard: AISI, ASTM, DIN, EN, GB, JIS
Type: Round
Delivery State: Annealing/Quenching
Dimensions: 40mm--360mm
Application: Annealing/Quenching
Length: according to order(1.5m--6m)
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    Steel tubes for machining Seamless hollow bars for machining Steel grade · 20MnV6

    Product Name : 440c stainless steel round bar Round Bar : Diameter 3-800mm


    AISI 4130 is a low alloy chromium molybdenum (CrMo) steel. It has a lower carbon level than 4140
    giving improved weldability and machinability. It is widely used in oil field applications


    Scope
    The specification defines the requirements for AISI 4130 hot rolled CrMo bars hardened and tempered to meet 75ksi minimum yield, 22HRc
    maximum, in line with API 6A


    U-bent tubes

    Standard

    metric dimensions EN 10216-2, tolerances acc. to EN 10305

    inch dimensions ASME SA 556 C 2

    ASTM A 179M 1990a, ASME SA 179M, ASME Section II part A

    Dimensions

    metric dimensions 10 x 1 mm to 30 x 2.5 mm

    inch dimensions 19.05 x 1.65 mm to 25.4 x 3.4 mm

    Tolerances

    metric dimensions acc. to EN 10305-1

    inch dimensions outside diameter acc. to EN 10305-1 wall thickness 0/+20 % (SA 556M)

    Materials Steel grade (EN) Steel grade (ASTM/ASME) metric dimensions P235 GH TC 1 SA 556 C 2

    inch dimensions P235 GH TC 1 A 179/SA 179 other materials on request

    Certification 3.1 acc. to EN 10204

    other certifications on request


    Boiler and heat exchanger tubes

    Seamless boiler tubes

    Standard EN 10216-2

    other standards on request

    Dimensions 13.5 x 1.8 mm to 610 x 30 mm

    other dimensions on request

    Tolerances outside diameter and wall thickness acc. to EN 10216-2

    Lengths 5 to 7 m, partly 10 to 14 m

    other lengths and fixed lengths on request

    Materials Steel grade (EN) Steel grade (JIS) Steel grade (ASTM/ASME)

    P235 GH TC 1 ST B 340 A/SA 192

    P235 GH TC 2 ST B 410 A/SA 210

    16Mo3 ST B 510 A/SA 213

    13CrMo4-5 ST BA 12 T5, T11, T12, T22, T91

    10CrMo9-10 ST BA 22

    ST BA 24

    other materials on request

    Surface protection on request

    Marking manufacturer stamp, EN standard, material, size, heat number or identification number,

    if applicable test category and tube number (depending on material)

    Leak testing water pressure or electromagnetic testing acc. to EN 10246-1 (SEP 1925)

    other testing on request Certification 3.1 acc. to EN 10204 3.2 acc. to EN 10204 for alloyed boiler


    3.1 EN 10217-1 (DIN 1626)
    Rohre aus unlegiertem Stahl mit festgelegten Eigenschaften
    bei Raumtemperatur
    · Herstellverfahren,
    Fertigungsablauf,
    Lieferzustand siehe EN 10217-1 Tab. 1
    · Anwendungsbereiche gem. Regelwerke DVGW, TRB, TRD,
    PED und ADW-Merkblätter
    · Güte TR 1 ohne Wärmebehandlung oder
    normalgeglüht oder Schweißnahtbereich
    normalgeglüht oder normalisierend
    gewalzt
    · Werkstoffe Nr. / EN / (DIN) 1.0107 P 195 TR 1 (St 33)
    1.0254 P 235 TR 1 (St 37.0)
    1.0258 P 265 TR 1 (St 44.0)
    1.0108 P 195 TR 2
    1.0255 P 235 TR 2
    1.0259 P 265 TR 2
    · Schweißverfahren - Gaspressschweißen
    - HFI-Schweißen
    - UP-Schweißen für Längs- und
    Spiralnaht
    · Abmessung
    DA 10,2 bis 2.540 mm
    · Wanddicke bis 40 mm
    · Lieferlänge 6 m, 12 m, teilweise bis 18 m
    · Maßtoleranz
    DA ≤ 219,1 +/- 1 % oder +/- 0,5 mm
    jeweils der größere Wert
    > 219,1 +/- 0,75 %, max. +/- 6 mm
    jeweils der größere Wert
    WD +/- 10 %, min. +/- 0,3 mm
    und gem. EN 10217-1 Tab. 6
    jeweils der größere Wert
    · Geradheit 1,5 : 1.000 für das Rohr
    örtlich 3 : 1.000 mm
    · Schweißnahtüberhöhung
    - stumpfgeschweißt innen + 0,5 mm / + 0,05 × WD
    außen gewalzt
    - elektropressgeschweißt innen 1,5 mm
    außen abgearbeitet
    - UP-geschweißt,
    SAW-Rohre innen und außen
    < 12,5 mm WD: max. 3,5 mm
    > 12,5 mm WD: max. 4,8 mm
    · Genaulänge
    < 406,4 6.000 mm + 10 mm
    6.000 > 12.000 mm + 15 mm
    > 12.000 mm n.V.
    > 406,4 6.000 mm + 25 mm
    6.000 > 12.000 mm + 50 mm
    > 12.000 mm n.V.
    · Unrundheit
    < 406,4 wie DA-Grenzwert
    > 406,4 < 2 %
    · Kennzeichnung Werksstempel, Kurzzeichen,
    Schweißverfahren, EN-Norm,
    Stahlsorte, bei APZ Abnehmerzeichen
    und Identifizierungsnummer
    · Zeugnis
    WZ EN 10204-2.2
    APZ EN 10204-3.1 oder 3.2
    3.2 EN 10217-2 (DIN 1626)
    Elektrisch geschweißte Rohre aus unlegierten und legier-
    ten Stählen mit festgelegten Eigenschaften bei erhöhten
    Temperaturen
    · Herstellverfahren,
    Fertigungsablauf,
    Lieferzustand siehe EN 10217-2 Tab. 1
    · Anwendungsbereiche gem. Regelwerke DVGW, TRB, TRD,
    PED und ADW-Merkblätter
    · Güte TC 1 = Prüfklasse 1 (ohne US-Prüfung)
    TC 2 = Prüfklasse 2 (mit US-Prüfung)
    · Werkstoffe Nr. / EN / (DIN) 1.0348 P 195 GH (St 33)
    1.0345 P 235 GH (St 37.8)
    1.0425 P 265 GH (St 42.8)
    1.5415 16M03 (15M03)
    · Schweißverfahren - Gaspressschweißen
    - HFI-Schweißen
    - UP-Schweißen für Längs- und
    Spiralnaht
    · Abmessung
    DA 10,2 bis 2.540 mm
    · Wanddicke bis 40 mm
    · Lieferlänge 6 m, 12 m, teilweise bis 18 m
    · Maßtoleranz
    DA ≤ 219,1 +/- 1 % oder +/- 0,5 mm
    jeweils der größere Wert
    > 219,1 +/- 0,75 %
    WD +/- 10 %, min. +/- 0,3 mm
    und gem. EN 10217-2 Tab. 7
    jeweils der größere Wert
    · Geradheit 1,5 : 1.000 für das Rohr
    örtlich 3 : 1.000 mm
    · Schweißnahtüberhöhung
    - stumpfgeschweißt innen + 0,5 mm / + 0,05 × WD
    außen gewalzt
    - elektropressgeschweißt innen 1,5 mm
    außen abgearbeitet
    - UP-geschweißt,
    SAW-Rohre innen und außen
    < 12,5 mm WD: max. 3,5 mm
    > 12,5 mm WD: max. 4,8 mm
    · Genaulänge
    < 406,4 6.000 mm + 10 mm
    6.000 > 12.000 mm + 15 mm
    > 12.000 mm n.V.
    > 406,4 6.000 mm + 25 mm
    6.000 > 12.000 mm + 50 mm
    > 12.000 mm n.V.
    · Unrundheit
    < 406,4 wie DA-Grenzwert
    > 406,4 < 2 %
    · Kennzeichnung Werksstempel, Kurzzeichen,
    Schweißverfahren, EN-Norm,
    Stahlsorte, bei APZ Abnehmerzeichen
    und Identifizierungsnummer
    · Zeugnis
    WZ EN 10204-2.2
    APZ EN 10204-3.1 oder 3.2


    Seamless stainless instrumentation tubes

    Standard EN 10216-5 TC1 resp. TC2, AD2000-W2 Einbaurohre resp. no Einbaurohre,

    ADW10, ASTM A 312, ASME SA 312, NACE MR 0175/ISO 15156-3

    Dimensions 4 x 0.5 mm to 42 x 3 mm

    other dimensions on request

    Tolerances acc. to EN 10305-1 and ASTM A 269/999 (for O.D. ≤ 30 mm)

    Lengths 5 to 7 m

    other lengths and fixed lengths on request

    Delivery conditions cold finished, bright annealed or pickled

    Materials Material number Steel grade (ASTM/ASME/AISI)

    1.4301/06 TP 304/304L

    1.4404 TP 316L

    1.4541 TP 321

    1.4571 TP 316Ti / UNS S31635

    Certification 3.1 or 3.2 (in case of AD2000-W2) acc. to EN 10204

    Seamless stainless tubes, cold finished

    Standard EN 10216-5 TC1 resp. TC2, AD2000-W2 Einbaurohre resp. no Einbaurohre,

    ADW10, ASTM A 312, ASME SA 312, NACE MR 0175/ISO 15156-3

    Dimensions 12.7 x 2.11 to 139.7 x 4 mm

    other dimensions on request

    Tolerances acc. to EN ISO 1127D3/T3 and ASTM A 312

    Lengths 5 to 7 m

    other lengths and fixed lengths on request

    Delivery conditions cold finished, bright annealed or annealed and pickled

    Materials Material number Steel grade (ASTM/ASME/AISI)

    1.4301/06 TP 304/304L

    1.4404 TP 316L

    1.4541 TP 321

    1.4571 TP 316Ti / UNS S31635

    Certification 3.1 or 3.2 (in case of AD2000-W2) acc. to EN 10204

    Heav y, standard wall and mechanical tubes

    Seamless hot rolled tubes for steel constructions

    Standard EN 10210-1/-2

    Dimensions 10.2 x 1.6 mm to 711 x 100 mm

    other dimensions on request

    Lengths 4 to 15 m

    other lengths and fixed lengths on request

    Materials Material number Steel grade (EN)

    1.0576 S355 J2H

    1.0539 S355 NH

    other materials on request

    Marking manufacturer stamp, EN standard, material, delivery condition, size,

    heat number or identification number

    Testing on request

    Certification 3.1 acc. to EN 10204

    other certifications on request

    Seamless hot rolled tubes for pressure requirements

    Standard (part 1) EN 10216-1

    Dimensions 10.2 x 1.6 mm to 711 x 14.2 mm

    other dimensions on request

    Lengths 4 to 15 m

    other lengths and fixed lengths on request

    Materials Material number Steel grade (EN)

    1.0254 P235 TR 1 + TR 2

    1.0258 P265 TR 1

    other materials on request

    Standard (part 3) EN 10216-3

    Dimensions 10.2 x 1.6 mm to 711 x 100 mm

    other dimensions on request

    Lengths 4 to 15 m

    other lengths and fixed lengths on request

    Materials Material number Steel grade (EN)

    1.0562 P355 N TC1 (usually in

    combination with E355 N

    and S355 J2H)

    other materials on request

    Marking manufacturer stamp, EN standard, material, delivery condition, size, heat number or identification number

    Certification 3.1 acc. to EN 10204, other certifications on request

    Seamless hydraulic and pneumatic line pipes – BENTELER Zistaplex®

    Standard EN 10305-4

    other standards such as EN 10305-1/-2/-3 on request

    Dimensions 4 x 0.5 mm to 42 x 6 mm

    Lengths 6 m

    other lengths and fixed lengths on request

    Delivery conditions +N (NBK)

    other delivery conditions on request

    Materials Steel grade (EN)

    E235

    E355

    other materials on request

    Surface treatment outside galvanized (min. 8 μm), CR-VI-free passivation,

    additional organic coating (EPOXY ≤ 50 μm), RAL 9005, black

    other colors, coatings and thicknesses on request

    Marking continuous marking along the entire tube length

    Certification 3.1 acc. to EN 10204

    other certifications on request


    Seamless stainless instrumentation tubes

    Standard EN 10216-5 TC1 resp. TC2, AD2000-W2 Einbaurohre resp. no Einbaurohre,

    ADW10, ASTM A 312, ASME SA 312, NACE MR 0175/ISO 15156-3

    Dimensions 4 x 0.5 mm to 42 x 3 mm

    other dimensions on request

    Tolerances acc. to EN 10305-1 and ASTM A 269/999 (for O.D. ≤ 30 mm)

    Lengths 5 to 7 m

    other lengths and fixed lengths on request

    Delivery conditions cold finished, bright annealed or pickled

    Materials Material number Steel grade (ASTM/ASME/AISI)

    1.4301/06 TP 304/304L

    1.4404 TP 316L

    1.4541 TP 321

    1.4571 TP 316Ti / UNS S31635

    Certification 3.1 or 3.2 (in case of AD2000-W2) acc. to EN 10204

    Seamless stainless tubes, cold finished

    Standard EN 10216-5 TC1 resp. TC2, AD2000-W2 Einbaurohre resp. no Einbaurohre,

    ADW10, ASTM A 312, ASME SA 312, NACE MR 0175/ISO 15156-3

    Dimensions 12.7 x 2.11 to 139.7 x 4 mm

    other dimensions on request

    Tolerances acc. to EN ISO 1127D3/T3 and ASTM A 312

    Lengths 5 to 7 m

    other lengths and fixed lengths on request

    Delivery conditions cold finished, bright annealed or annealed and pickled

    Materials Material number Steel grade (ASTM/ASME/AISI)

    1.4301/06 TP 304/304L

    1.4404 TP 316L

    1.4541 TP 321

    1.4571 TP 316Ti / UNS S31635

    Certification 3.1 or 3.2 (in case of AD2000-W2) acc. to EN 10204

    Seamless heat exchanger tubes

    Standard

    metric dimensions EN 10216-2, tolerances acc. to EN 10305

    inch dimensions ASTM A 179M-1990a, ASME SA 179M, ASME Section II part A

    Dimensions

    metric dimensions 10 x 1 mm to 30 x 2.5 mm

    inch dimensions 19.05 x 1.65 mm to 25.4 x 3.4 mm other dimensions on request

    Lengths lengths and fixed lengths on request

    Materials Steel grade (EN) Steel grade (ASTM/ASME) metric dimensions P235 GH TC 1 SA 556 C 2

    inch dimensions P235 GH TC 1 A 179/SA 179

    other materials on request

    Marking manufacturer stamp, material, size, heat number or identification number

    Leak testing

    metric dimensions electromagnetic testing acc. to EN 10246-1 (SEP 1925)

    inch dimensions electromagnetic testing acc. to ASME SA 450, test hole 0.8 mm

    Certification 3.1 acc. to EN 10204

    other certifications on request

    U-bent tubes

    Standard

    metric dimensions EN 10216-2, tolerances acc. to EN 10305

    inch dimensions ASME SA 556 C 2

    ASTM A 179M 1990a, ASME SA 179M, ASME Section II part A

    Dimensions

    metric dimensions 10 x 1 mm to 30 x 2.5 mm

    inch dimensions 19.05 x 1.65 mm to 25.4 x 3.4 mm

    Tolerances

    metric dimensions acc. to EN 10305-1

    inch dimensions outside diameter acc. to EN 10305-1 wall thickness 0/+20 % (SA 556M)

    Materials Steel grade (EN) Steel grade (ASTM/ASME) metric dimensions P235 GH TC 1 SA 556 C 2

    inch dimensions P235 GH TC 1 A 179/SA 179 other materials on request

    Certification 3.1 acc. to EN 10204

    other certifications on request


    Chemical composition

    material
    C
    Si
    Mn
    P
    S
    Cr
    Ni
    Mo
    Cu
    35CrMoA
    0.34-0.39
    0.17-0.37
    0.40-0.70
    0.015
    max
    0.010
    max
    0.80-1.10
    0.30
    max
    0.15-0.25
    0.25max
    42CrMoA
    0.39-0.45
    0.17-0.37
    0.50-0.80
    0.015
    max
    0.010
    max
    0.90-1.20
    0.20
    max
    0.20-0.25
    0.25max

    Equivalent Steel Grade

    DIN
    ASTM A29
    JIS G4105
    BS
    GB

    EN ISO 10250
    1.7225
    4140
    SCM440
    708M40/708A42/709M40
    42CrMo
    42CrMo4

    Mechanical Properties

    Grade
    Tensile Strength
    Mpa
    Yield Strength
    Mpa
    Elongation
    %
    Reduction
    %
    -40℃Akv2/J
    Hardness
    10.9
    ≥1040
    ≥940
    ≥9
    ≥48
    ≥50
    HRC32-39
    8.8
    ≥830
    ≥660
    ≥12
    ≥52
    ≥70
    HRC23-34

    Seamless hot rolled tubes for mechanical engineering

    Standard EN 10297-1

    Dimensions 10.2 x 1.6 mm to 711 x 100 mm

    other dimensions on request

    Lengths 4 to 15 m

    other lengths and fixed lengths on request

    Delivery conditions +AR

    +N

    other delivery conditions on request

    Materials Material number Steel grade (EN)

    1.0308 E235

    1.0580 E355

    1.0536 E470

    other materials on request

    Marking manufacturer stamp, EN standard, material, delivery condition, size,

    heat number or identification number

    Testing water pressure testing or leak testing acc. to EN ISO 10893-1

    other testing on request

    Certification 3.1 acc. to EN 10204

    other certifications on request

    Seamless steel tubes for machining

    Standard EN 10294-1

    Dimensions 30 x 20 mm to 250 x 120 mm

    other dimensions on request

    Lengths 4 to 8 m

    other lengths and fixed lengths on request

    Materials Material number Steel grade (EN)

    1.0580 E355

    1.0592 E355 J2

    1.0599 E420 J2

    1.0536 E470

    1.0644 E590 K2

    other materials on request

    Marking manufacturer stamp, EN standard, material, delivery condition, size,

    heat number or identification number

    Testing on request

    Certification 3.1 acc. to EN 10204

    other certifications on request

    Hard chromed bars for piston rod applications

    Dimensions outside diameter 8 to 250 mm

    Tolerances outside diameter 8 to 18 mm acc. to f8

    outside diameter 20 to 250 mm acc. to f7

    other tolerances on request

    Materials Material number Steel grade (EN)

    1.5217 20MnV6

    1.7225* 42CrMo4+QT

    1.1191* C45E

    1.1213* Cf 53 (DIN)

    1.1303* 38MnVS6

    other materials on request

    *also induction hardened

    Surface chromed

    double chromed and NICROM (nickel/chrome) on request

    Ra max. 0.25 µm

    Chrome

    thickness min. 15 μm for tubes with an outside diameter of 8 to 18 mm min. 20 μm for tubes with an outside diameter of 20 to 250 mm micro hardness min. 850 HV 0.1

    Corrosion resistance min. 200 h in NSS rating 9Testing corrosion testing acc. to ISO 9227Certification 3.1 acc. to EN 10204

    other certifications on request


    Standard

    metric dimensions EN 10216-2, tolerances acc. to EN 10305

    inch dimensions ASTM A 179M-1990a, ASME SA 179M, ASME Section II part A

    Dimensions

    metric dimensions 10 x 1 mm to 30 x 2.5 mm

    inch dimensions 19.05 x 1.65 mm to 25.4 x 3.4 mm other dimensions on request

    Lengths lengths and fixed lengths on request

    Materials Steel grade (EN) Steel grade (ASTM/ASME) metric dimensions P235 GH TC 1 SA 556 C 2

    inch dimensions P235 GH TC 1 A 179/SA 179

    other materials on request

    Marking manufacturer stamp, material, size, heat number or identification number

    Leak testing

    metric dimensions electromagnetic testing acc. to EN 10246-1 (SEP 1925)

    inch dimensions electromagnetic testing acc. to ASME SA 450, test hole 0.8 mm

    Certification 3.1 acc. to EN 10204

    other certifications on request


    Welded stainless decoration tubes

    Standard EN 10296-2

    Dimensions 10 x 1 mm to 300 x 4 mm

    other dimensions on request

    Tolerances acc. to EN ISO 1127 or ASTM A 269/999, D4/T3 or D3/T3 or D2/T2

    Lengths 5 to 7 m

    other lengths and fixed lengths on request

    Delivery conditions metallically bright or polished 240/320

    Materials Material number Steel grade (ASTM/ASME/AISI)

    1.4301 TP 304

    Certification 2.2 or 3.1 acc. to EN 10204

    Welded square and rectangular tubes

    Standard EN 10296-2

    Dimensions 10 x 10 x 1 mm to 200 x 200 x 6 mm

    20 x 10 x 1.2 mm to 250 x 150 x 4 mm

    other dimensions on request

    Tolerances acc. to EN ISO 1127 or ASTM A 269/999

    Lengths 5 to 7 m

    other lengths and fixed lengths on request

    Delivery conditions metallically bright or polished 240

    Materials Material number Steel grade (ASTM/ASME/AISI)

    1.4301 TP 304

    1.4571 TP 316Ti

    Certification 2.2 or 3.1 acc. to EN 10204


    Nahtlose Stahlrohre für Druckbeanspruchungen
    2.1 EN 10216-1 bzw. EN 10216-3 (DIN 1629)
    Rohre aus unlegiertem Stahl bzw. legiertem Feinkornstahl
    mit festgelegten Eigenschaften bei Raumtemperatur
    · Anwendungsbereich gem. Regelwerke DVGW, TRB, TRD
    und ADW-Merkblätter
    · Güte TR 1/ TR 2 umgeformt oder normalgeglüht
    oder normalisierend umgeformt
    TR 2 normalgeglüht
    · Werkstoffe Nr. / EN / (DIN) 1.0107 P 195 TR 1 (St 33)
    1.0254 P 235 TR 1 (St 37.0)
    1.0258 P 265 TR 1 (St 44.0)
    1.0562 P 355 N (St 52.0)
    1.0108 P 195 TR 2
    1.0255 P 235 TR 2
    1.0259 P 265 TR 2
    · Lieferlänge 4 bis 7 m oder doppelte Länge
    · Abmessungsbereich
    DA 10,2 bis 711 mm
    · Wanddicke bis 100 mm
    · Genaulänge < 6.000 mm + 10 mm
    6.000 > 12.000 + 15 mm
    > 12.000 n. V.
    · Geradheit 1,5 : 1.000 für das Rohr
    örtlich 3 : 1.000
    · Rohrtoleranz
    DA +/- 1 % oder +/- 0,5 mm
    jeweils der größere Wert
    · Wandtoleranz
    ≤ 219,1 DA +/- 12,5 % min. +/- 0,4 mm
    jeweils der größere Wert
    > 219,1 DA +/- 20 bis +/- 10 % und
    gem. EN 10216-1 Tab. 6 bzw.
    EN 10216-3 Tab. 9
    · Kennzeichnung Werksstempel, EN-Norm, Stahlsorte
    · Zeugnis
    WZ EN 10204-2.2
    APZ EN 10204-3.1 oder 3.2
    · Umstempelungsgenehmigung
    vorhanden
    2.2 EN 10216-2 (DIN 17175)
    Rohre aus unlegiertem und legiertem Stahl mit festgelegten
    Eigenschaften bei erhöhten Temperaturen
    · Anwendungsbereich Kesselrohre mit werkstoffbezogenen
    Temperaturen ohne Trennung
    nach Drücken
    · Güte TC 1 = Prüfklasse 1 (ohne US-Prüfung)
    TC 2 = Prüfklasse 2 (mit US-Prüfung)
    · Werkstoffe Nr. / EN / (DIN) 1.0348 P 195 GH (UH 1)
    1.0345 P 235 GH (St 35.8 / H 1)
    1.0425 P 265 GH (St 45.8)
    1.5415 16 Mo 3 (15 Mo 3)
    1.7335 13 CrMo 4-5 (13 CrMo 44)
    1.7380 10 CrMo 9-10 (10 CrMo 910)
    · Lieferlänge 5 bis 7 m oder doppelte Länge
    · Abmessungsbereich
    DA 10,2 bis 711 mm
    · Wanddicke bis 100 mm
    · Genaulänge nach Vereinbarung
    · Geradheit 1,5 : 1.000 für das Rohr
    örtlich 3 : 1.000 mm
    · Rohrtoleranz
    DA +/- 1 % oder +/- 0,5 mm
    jeweils der größere Wert
    DI +/- 1 % oder +/- 2 mm
    jeweils der größere Wert
    · Wandtoleranz
    ≤ 219,1 DA +/- 12,5 % +/- 0,4 mm
    jeweils der größere Wert
    > 219,1 DA +/- 10 bis +/- 20 %
    weitere Grenzabmaße siehe EN 10216-2
    Tabellen 7–11
    · Kennzeichnung Werksstempel, EN-Norm, Stahlsorte,
    Schmelzen-Nr, Prüfklasse TC 1,
    bei unlegiert Prüfklasse TC 2 Abneh-merzeichen,
    Identifizierungsnummer
    · Abnahmeprüfzeugnis EN 10204-3.1
    · Amtliche Regelwerke DVGW, TRD-, TRB-Richtlinien, PED,
    ADW-Merkblätter
    · Umstempelungsgenehmigung
    vorhandenHoned or skived and roller burnished cylinder tubes

    Standard EN 10305-1/-2

    Dimensions 30 x 5 mm to 300 x 25 mm

    Tolerances outside diameter acc. to EN 10305-1/-2

    inside diameter acc. to H8, ISO 286 part 2

    Lengths 5 to 8 m

    other lengths and fixed lengths on request

    Delivery conditions +SR (BKS)

    Materials Steel grade (EN)

    E355

    other materials on request

    Surface roughness (inside) Ra max. 0.3 µm acc. to EN ISO 4287

    Certification 3.1 acc. to EN 10204

    other certifications on request

    Cylinder tubes suitable for honing or skiving and roller burnishing

    Standard EN 10305-1/-2

    Dimensions 30 x 5 mm to 300 x 25 mm

    Tolerances outside diameter acc. to EN 10305-1/-2

    Delivery conditions +SR

    Materials Steel grade (EN)

    E 355

    other materials on request

    Surface treatment inside suitable for honing or skiving and roller burnishing

    Certification 3.1 acc. to EN 10204

    other certifications on request


    Surface Treatment Bar: Origin Black, Origin Annealing bright, Turned, Peeled, Grinded

    Heat Treatment/ Anealing
    1) Forging
    Preheat the steel carefully, then raise the temperature to 1150-1200°C for forging. Do not forge below 850°C.
    2)Annealing
    Heat the AISI 4140 slowly to 800-850°C and allow enough time for the steel to be thoroughly heated. Cool slowly in the furnace to 480°C followed by air cooling.
    3)Stress Relieving
    When parts are heavily machined, ground or otherwise subject to cold work, stress relieving will be beneficial prior to hardening.
    4)Hardening
    AISI 4140 steel is usually supplied ready heat treated to 18-22HRC. If further heat treatment is required annealed AISI 4140 should be heated slowly to 840-875°C and after adequate soaking at this temperature quench in oil. Temper as soon as the tools reach room temperature.
    5)Tempering
    Heat the AISI 4140 carefully to a suitable temperature selected by reference to a tempering chart or table (usually between 550-700°C, soak at the temperature for 2 hours per 25mm of ruling section, then allow to cool in air. Tempering between 250-375°C is not advised as tempering within this range will seriously reduce the impact value.


    Quality :


    Our products will be from black round bar. We will order the raw material from first class steel making companies to guarantee the inner quality. You can also lock the raw material manufacturer for your order.

    We will continually improves and expands the quantity and quality of our product which exactly meet customers need. We do whatever it takes to make our clients happy.
    We will develop long-term commercial and technical partnerships with customers. And we are committed to continual quality improvement of all internal processes. The success of our quality program is affirmed by our strong customer retention rate.


    Certification :


    Achieving the ISO 9001:2008 Certification is just one example of our Products’ dedication to quality and continuous improvement. Each employee is responsible for understanding company expectations and adhering to the procedures of our Quality Management System.
    Our Products ensures customers receive the material ordered with accurate supporting paperwork. Customers can count on proper documentation, on-time performance and effective follow-up.


    Our company

    Our story
    Since beginning operation in 1996, We has been dedicated to providing more than just material supply, We has helped customers reduce costs and improve the bottom line. This approach to partnering with customers has made our Products a leader among Steel Round bar and one of the fastest growing companies in China.


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    Buy Steel tubes for machining Seamless hollow bars for machining  Steel grade · 20MnV6 at wholesale prices
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