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  • JIS G 3441 Class 2 Alloy Seamless Steel Tubes

JIS G 3441 Class 2 Alloy Seamless Steel Tubes

Pipe ordered under this specification for machinery, automobiles and other machine parts.

PRODUCT DESCRIPTION

Standard: JIS G 3441

Application of JIS G 3441 Alloy Seamless Steel Tubes:

Pipe ordered under this specification for machinery, automobiles and other machine parts.

Manufacturing Process of JIS G 3441 Alloy Seamless Steel Tubes:

By a seamless process: hot finished and cold finished (with annealed)

Details of JIS G 3441 Alloy Seamless Steel Tubes We can supply:

Manufacture:seamless pipe (hot finished and cold finished)

Size: O.D.: 15.0~114mm W.T.: 2~20mm

Grade: Class1, Class2, Class3

Length: 6M or specified length as required.

Ends: Plain End, Beveled End.

Chemical Composition and mechanical properties JIS G3441 Alloy Seamless Steel tubes:

Grade and Chemical Composition (%)

GradeC≤SiMnP≤S≤CrMo
SCM 420TK0.18~0.230.15~0.350.60~0.850.0300.0300.90~1.20-
SCM 415TK0.13~0.180.15~0.350.60~0.850.0300.0300.90~1.200.15~0.30
SCM 418TK0.16~0.210.15~0.350.60~0.850.0300.0300.90~1.200.15~0.30
SCM 420TK0.18~0.230.15~0.350.60~0.850.0300.0300.90~1.200.15~0.30
SCM 430TK0.28~0.330.15~0.350.60~0.850.0300.0300.90~1.200.15~0.30
SCM 435TK0.33~0.380.15~0.350.60~0.850.0300.0300.90~1.200.15~0.30
SCM 440TK0.38~0.430.15~0.350.60~0.850.0300.0300.90~1.200.15~0.30
Note: 1. Ni as an impurity in various steel pipes does not exceed 0.25%, and Cu does not exceed 0.30%; 2. When the purchaser requests the analysis of the finished product, the allowable deviation is as specified in Table 3 of JIS G0321.


Tolerance of outside diameter and wall thickness:

Tolerance of OD and W.T

DivisionTolerance on O.DTolerance on W.T
Class 1D<50m±0.5 mmS<4mm+0.6mm-0.5mm
50mm≤D±1%S≥4mm+1% -12.5%
Class 2D<50m±0.25mmS<3mm±0.3mm
50mm≤D±0.5%S≥3mm±10%
Class 3D<25m±0.12mmS<2mm±0.15mm
40mm>D≥25mm±0.15mm

50mm>D≥40mm±0.18mmS≥2mm±8%
60mm>D≥50mm±0.20mmNotes: tolerance on each wall thickness shall be rounded off to one decimal place in accordance with rule a JIS Z 8401
70mm>D≥60mm±0.23mm
80mm>D≥70mm±0.25mm
90mm>D≥80mm±0.30mm
100mm>D≥90mm±0.40mm
D≥100mm±0.50%





1. The OD tolerance of hot finish seamless steel pipe according to Class1 2. Quenched and tempered steel pipes according to 4 categories.


Delivery Condition:

In principle, it should be in manufacturing condition, or a cold finish condition, or an annealing condition. Other heat treatments are available upon request

Appearance for JIS G3441 Alloy Seamless Steel tubes:

The steel pipe shall be straight and the both ends should be cut in perpendicular; there shall be no defects on the surface that are harmful to the use;

When there are special requirements for pipe surface processing, the supplier and the buyer agree.

Marking:

a.Grade

b.Manufacture method code(hot finished seamless steel pipe: S-H; Cold finished seamless steel pipe: S-C)

c.Dimensions(nominal diameter X nominal wall thickness or outside diameter X wall thickness)

d.Manufacturer's name or its identifying brand

Packing for JIS G3441 Alloy Seamless Steel tubes:

a.Bare pipe, black coating ( customized);

b.6" and below sizes In bundles with two cotton slings, other sizes in loose;

c.Both ends with end protectors;

d.Plain end, bevel end

e.Marking.