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characteristics of 20# steel
20# steel is a high-grade unalloyed steel used in metal structures and components operating in temperatures of -40°с to +450°с. hot-rolled and forged long products made from 20 steel conform to the dstu 7809 and gost 1050 standards.
cold deformation, high plasticity, generally for bending, rolling, bending and hammer arch and other processing, arc welding and contact welding welding performance is good, gas welding when the thickness is small, strict shape or shape complex parts prone to crack. cutting process cold drawn or normalized state is better than the annealed state, generally used in the manufacture of small force and toughness of the workpiece.
20# seamless steel pipe material for the 20# steel, the intensity is slightly higher than the 15#, rarely quenching, no temper brittleness.
chemical composition of 20 steel, according dstu 7809%
|
с |
si |
mn |
p |
s |
cr |
cu |
ni |
|
0.17-0.24 |
0.17-0.37 |
0.35-0.65 |
≤0.035 |
≤0.040 |
≤0.25 |
≤0.30 |
≤0.30 |
mechanical properties of 20 steel after normalization
|
minimum yield strength, n/mm2, not less |
ultimate tensile strength, n/mm2, not less |
minimum elongation ratio, %, not less |
contraction ratio, %, not less |
|
245 |
410 |
25 |
55 |
analogues to steel 20
|
us |
1020, 1023, 1024, g10200, g10230, h10200, m1020, m1023 |
|
japan |
s20c, s20ck, s22c, stb410, stkm12a, stkm12a-s, stkm13b, stkm13b-w |
|
eu |
1.1151, 2c22, c20e2c, c22, c22e |
|
china |
20, 20g, 20r, 20z |
|
sweden |
1450 |
|
australia |
1020, m1020 |
|
switzerland |
ck22 |
|
south korea |
sm20c, sm20ck, sm22c |
