S10C, S20C, S35C, S45C, ST37, SAE1536HT, 16MnCr5 AUTOMOTIVE TUBE



high precision cold drawn and cold rolled seamless steel tubes for auto parts in transmission, powertrain, steering and suspension systems.


Optimized mechanical properties enabling easy bending, flaring, flattening and other processing

Good surface roughness suitable for electrophoresis, coating, galvanization and chroming processing

High precision

Excellent microstructure

Size Range

O.D 16-245mm, WT 1-32mm

Executive Standard

GB/T3639, Cold-drawn or cold-rolled precision seamless steel

DIN2391, Seamless precision steel tubes

DIN2393, Welded Precision Steel Tubes

EN10305-1, Steel tubes for precision applications Part 1: Seamless cold drawn tubes

EN10305-2, Cold drawn steel tubes for precision applications Part 2: Welded cold drawn tubes

ASTM A519, Seamless Carbon and Alloy Steel Mechanical Tubing

ASTM A513, Electric-Resistance-Welded Carbon and Alloy Steel Mechanical Tubing

JIS G3445, Carbon Steel Pipe For Mechanical Purpose

JIS G4051, Carbon Steels for Machine Structural Use

According to customer’s specific requirements

Steel Grade

10#, 20#, 35#, 45#, 55#, Q355B, 25Mn, 16MnCr5, 20MnCr5, 30CrMo, 35CrMo, 42CrMo, 20Cr, 40Cr, 20CrNiMo ; ST37, ST45, ST52, 34CrMo4, 42CrMo4 ; E235, E255, E355 ; 1010, 1020, 1026, 1035, 1045, 1050, 4130, 4140, 8620 ; SAE1541M, SAE1041M, SAE1536HT, STKM 11A, STKM 12B, STKM 13C, STKM 14B ; S10C, S20C, S35C, S45C and etc.

Delivery Condition

Cold drawn/hard (+C) (BK)

Cold drawn/soft (+LC) (BKW)

Cold drawn and stress relieved (+SR) (BKS)

Annealed (+A) (GBK)

Normalized (+N) (NBK)

Quenched and Tempered (QT)

Our customer: