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Grade grade

Chemical composition limits, %

C

Si

Mn

P max

S max

Ni

Cr

Mo

360

≤0.17

0.10-0.35

0.40-0.80

0.035

0.035

/

/

/

440

0.12-0.18

0.10-0.35

0.90-1.20

0.035

0.035

/

/

/

243

0.10-0.20

0.10-0.35

0.40-0.80

0.035

0.035

≤0.20

≤0.30

0.25-0.30

620-460

0.10-0.15

0.10-0.35

0.40-0.70

0.030

0.030

≤0.20

0.70-1.10

0.45-0.65

622-490

0.08-0.15

≤0.50

0.30-0.70

0.025

0.020

≤0.20

2.00-2.50

0.90-1.20

Grade grade

Mechanical properties

Steel type

Steel number

Yield strength MPa

Min.

Tensile strength MPa

Elongation %

Min.

Carbon

360

235

360-510

24

Carbon manganese

440

245

440-580

21

0.3%Mo

243

275

480-630

22

1%Cr0.5%Mo

620-460

180

460-610

22

2.25%Cr1%Mo

622-490

275

490-640

20