BKS BKW NBK Alloy Steel Tubes SCM418TK SCM420TK SCM430TK for Automobiles , Thin Wall Tube

Delivery Time:25~35days
Certification:ISO9001 14001 BV TUV PED DNV etc

BKS BKW NBK Alloy Steel Tubes SCM418TK SCM420TK SCM430TK for Automobiles , Thin Wall Tube

Quick Detail:

Standards: JIS G3441

Grade: SCr420TK SCM415TK SCM418TK SCM420TK SCM430TK SCM435TK SCM440TK

Size (mm):
Out Dimensions: 6mm ~ 350mm
Wall Thickness: 0.8mm ~ 35mm
Length: Fixed(6m,9m,12,24m) or normal length(5-12m)

Description:

Standards: JIS G3441

Grade: SCr420TK SCM415TK SCM418TK SCM420TK SCM430TK SCM435TK SCM440TK

Size (mm):

Outer Dimensions: 6mm ~ 350mm

Wall Thickness: 0.8mm ~ 35mm

Length: max 24000mm

Application: Tubes used for machinery, automobiles, bicycles, furniture, appliances and other machine parts.

Packing: Beveled/black painting/ plastic caps/ in bundles/ steel strips/ wooden protection
Inspection and Test: Chemical Composition Inspection, Mechanical Properties Test(Tensile Strength, Yield Strength,Elongation, Flaring, Flattening, Bending, Hardness, Impact Test),Surface and Dimension Test,Nodestructive Test, Hydrostatic Test.
Surface treatment:Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting
Mark: As requested.

Delivery Condition:Annealed, Normalized, Normalized and Tempered

Si

Size range of JIS G3441 Alloy Steel Tubes:

Tolerance on Outside Diameter in JIS G3441

O.D.(mm)	Tolerance(%)
<13 td>	0.25
<13-25	0.40
<25-40	0.60
<40-65	0.80
<65-90	1.00
<90-140	1.20
<140	By agreement

Tolerance on Wall Thickness in JIS G3441

W.T.(mm)	Tolerance
< td>	-0.5,+0.6
<4	-12.5%, +15%

How to Test JIS G3441 Alloy Steel Tubes:

Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation)

Technical Properties (Flattening Test, Flaring Test, Bending Test, Hardness Test, Blow Test, Impact Test etc)

Exterior Size Inspection.

Mill Test Certificate:EN 10204/3.1B

Delivery Condition:BKS, NBK,BK ,BKW, GBK(+A), NBK(+N), BK(+C)

JIS G3441 Alloy Steel Tubes Chemical composition Limits(%):

Steel grade	Steel grade(old)	C	Si	Mn	P	S	Cr	Mo
SCr420TK		0.18~0.23	0.15~0.35	0.60~0.85	<0 td>	<0 td>	0.90~1.20	0.15~0.30
SCM415TK		0.13~0.18	0.15~0.35	0.60~0.85	<0 td>	<0 td>	0.90~1.20	0.15~0.30
SCM418TK		0.16~0.21	0.15~0.35	0.60~0.85	<0 td>	<0 td>	0.90~1.20	0.15~