Material

C,%

Rm,MPa

ReL,MPa

A,%

External diameter

mm

Wall-thickness/mm

Non- straightness

Length/m

Roundness

30CrMo

0.26/0.34

≥910

≥765

≥12

232±0.75%
273±0.75%
325±0.75%
356±0.75%
406±0.75%

4.2,+15%,-0

4.8,+15%,-0

5.0, +15%,-0

5.6, +15%,-0

1.5mm/M

3-10.5

≤0.5%
diameter

35CrMo

0.32/0.40

≥960

≥825

≥12

34CrMo4

0.30/0.37

≥980

≥835

≥12

34Mn2V

0.30/0.37

≥745

≥530

≥16

P≤0.020S≤0.020P+S≤0.030.
Thermal treatment: quenching and tempering