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Long Lifespan Mild Steel Seamless Tube Low Alloy Chromium Molybdenum CrMo Steel

Long Lifespan Mild Steel Seamless Tube Low Alloy Chromium Molybdenum CrMo Steel

Brand Name: Best
Certification: API/CE/ISO/PED
Model Number: 40mm--360mm
Minimum Order Quantity: 1 Pcs
Delivery Time: 30 days normally, according to order quantity
Payment Terms: L/C, D/A, D/A, D/P, T/T, Western Union, MoneyGram
BEST PIPELINE EQUIPMENT CO.,LTD
Verified Supplier
Suzhou Jiangsu China
Business type: Manufacturer Distributor/Wholesaler Agent Importer Exporter Trading Company Seller Other
N0.192,Suzhou Industrial Park, JiangSu Province,China
Supplier`s last login times: within 36 hours

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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Product Tags:

alloy steel seamless tubes

      

seamless alloy steel tube

      

Long Lifespan Mild Steel Seamless Tube Low Alloy Chromium Molybdenum CrMo Steel Images

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Long Lifespan Mild Steel Seamless Tube Low Alloy Chromium Molybdenum CrMo Steel

EN 10297 20MNV6 Carbon Seamless Steel Pipe With Carbon Steel Plate

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Certification :API, CE, PED, ISO

ASTM A213 T11 Alloy Steel Pipe P11 Alloy Steel SCH 40 Fabricated Type

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Certification :API, CE, PED, ISO

P265GH P91 Alloy Steel Seamless Pipes Balck Seamless Carbon Steel Pipe

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Certification :API, CE, PED, ISO