Automobile Steel Pipe

Seamless Steel Tube for Auto Mechanical StructureStandards: ASTM A519, EN 10297-1 and JIS G3445

  • Applications

JST automotive steel pipe is true for general structure and automobile mechanical structure seamless steel tube. We mainly manufacture the following grades of pipes, such as 10#, 20#, 35#, 45#, 16Mn, 1020, 1045, 1541, E275, E315, 34CrMo4, 42CrMo4, STKM13A, STKM13B, etc.
Chemical Composition of Automotive Steel Pipe

Standard Grade Chemical Composition
C Si Mn P、S Cu Ni Mo Cr
ASTM A519 1020 0.18-0.23 / 0.30-0.60 ≤ 0.040 / / / /
1045 0.43-0.50 / 0.60-0.90 ≤ 0.040 / / / /
1541 0.36-0.44 / 1.35-1.65 ≤ 0.040 / / / /
EN10297-1 E275 ≤ 0.21 ≤ 0.35 ≤ 1.40 ≤ 0.030 / / / /
E315 ≤ 0.21 ≤ 0.30 ≤ 1.50 ≤ 0.030 / / / /
34CrMo4 0.30-0.37 ≤ 0.40 0.60-0.90 ≤ 0.035 / / 0.15-0.30 0.90-1.20
42CrMo4 0.38-0.45 ≤ 0.40 0.60-0.90 ≤ 0.035 / / 0.15-0.30 0.90-1.20
JIS G3445 STKM13A ≤ 0.25 ≤ 0.35 ≤ 0.60 ≤ 0.040 / / / /
STKM13B ≤ 0.25 ≤ 0.35 ≤ 0.60 ≤ 0.040 / / / /

Mechanical Properties of Seamless Steel Tube for Auto Mechanical Structure

Standard Grade Tensile Strength (MPa) Yield Strength (MPa) Elongation (%)
EN 10297-1 E275 ≥ 410 ≥ 275 ≥ 22
E315 ≥ 450 ≥ 315 ≥ 21
34CrMo4 ≥ 1000 ≥ 800 ≥ 11
42CrMo4 ≥ 1100 ≥ 900 ≥ 10
JIS G3445 STKM13A ≥ 375 ≥ 215 ≥ 30
STKM13B ≥ 440 ≥ 305 ≥ 20

Seamless Steel Pipe for Semi-Shaft CasingThis automotive steel pipe is a kind of hot-rolled seamless steel tube with high-quality carbon structural steel and alloy structure. It is mainly used for producing automobile semi-shaft casing and drive axle shaft tube. JST is able to supply 45Mn2, 45# and 25MnCr grades of automotive steel pipes for customers.

Dimensional Tolerance

Supply Conditions Steel Tubes Provided according to Outside Diameter and Wall Thickness Steel Pipes Provided according to Outside Diameter, Inside Diameter and Wall Thickness Steel Tubes with the Outside Diameter of 77 mm, Inside Diameter of 57 mm and the Wall Thickness of 10 mm
Allowable Deviation of Diameter and Wall Thickness Size (mm) Allowable Deviation (%) Size Allowable Deviation Size Allowable Deviation
Outside Diameter ±1.0 Outside Diameter ±1.0% Outside Diameter +1.0 mm-0.55 mm
Wall Thickness ≤ 7 +15-9
﹥7-15 +12.5-10 Inside Diameter ±1.75% Inside Diameter +1.5 mm-0.5 mm
﹥15 +12.5-7.5 Wall-Thickness-Difference ≤ 15% of Nominal Wall Thickness Wall-Thickness-Difference ≤ 15% of Nominal Wall Thickness

 

CONTACT FORM

We'll do our best to support our clients business growth.