DIN2391 Carbon Steel Mechanical Tubing For Automotive Hydraulic System

Delivery Time:30 Days
Certification:TS 16949

DIN2391 Carbon Steel Mechanical Tubing For Automotive Hydraulic System

Description: 

Standard:DIN2391/C/EN10305-1/4 /SAEJ524/BS6323/4/JISG3445/ASTMA519 Size:OD:4-60mm,WT:0.5-6mm. Material:ST35,ST37.4,ST37,ST45,ST52,ST52.4,E235,E255,E355,SAE1010,SAE1020 Delivery State:NBK/GBK. Raw material:Bao Steel,Huai Steel,XingCheng Steel with good quality. Length:5.8m,6m. Package:Bundles or wooden cases. Surface Anti-rust:Both outside and internal tube surface flushing with anti-rust oil.

Synopsis of Process Routing: Quality Carbon steel — Cold Drawn — Heat Treatment Without Oxidization (NBK Status) — Nondestructive Testing— Flushing The Internal Hole With Special Equipment Under The High Pressure —Dealing With Antirust Oil On Surface — Plastic Capping On Both Ends.

Quality: 

Surface roughness:Ra:0.8-1.3 um. Surface quality:very smooth and bright without oxide scale,pock,strach,crack and other defects. Internal hole Cleaness:clean without iron scrap,dust,better for hydraulic system life. Mechanical Properties:better extending rate and strength property,after bending with no deformation,after flattening and flaring process with no crack. Raw material: Precision tubes are made from carbon steel from quality Bao Steel,XingCheng Steel,and HuaiSteel.

Tolerance Table of DIN2391 Carbon Steel Mechanical Tubing For Automotive 

NAME	SCOPE(mm)	GB (mm)	DIN (mm)	Enterprise control(mm)	Special high-precision(mm)
Out Diameter	4-30	±0.1	±0.08	±0.05	±0.03
31-40	±0.15	±0.15	±0.05	±0.03
41-50	±0.20	±0.20	±0.08	±0.03
51-60	±0.25	±0.25	±0.08	±0.03
Wall thickness	0.5-7	±10%,Min±0.12	±10%	±10%,Min±0.05	±10%,Min±0.03

Steel grades for DIN2391 Carbon Steel Mechanical Tubing For Automotive 

Chemical composition(cast analysis)a
Steel grade	% by mass
Steel name	Steel number	C	Si	Mn	P	S
max.	max.		max.	max.
ST35	1.0305	0.17	0.35	≥0.40	0.025	0.025
ST45	1.0408	0.21	0.35	≥0.40	0.025	0.025
ST52	1.0580	0.22	0.55	≤1.60	0.025