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Steel 50РА (50P)

Designation

Name The value
Designation GOST Cyrillic 50РА
Designation GOST Latin 50PA
Transliteration 50RA
The chemical elements 50B
Name The value
Designation GOST Cyrillic 50Р
Designation GOST Latin 50P
Transliteration 50R
The chemical elements 50B

Description

50РА steel is used: for the production of slabs for the manufacture of tape, the flat springs for various purposes.

Note

Steel spring alloy of high quality.

Standards

Name Code Standards
Sheets and stripes В23 GOST 14918-80
Sectional and shaped rolling В32 GOST В 5160-89, TU 14-1-1271-75
Tapes В34 TU 14-1-2687-79, TU 14-1-2992-80
Bulls. Blanks. Slabs В31 TU 14-1-2782-79

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu B
TU 14-1-2687-79 0.49-0.55 ≤0.01 ≤0.02 0.5-0.8 0.1-0.3 0.17-0.37 ≤0.3 The rest - ≥0.001
TU 14-1-2782-79 0.49-0.55 ≤0.012 ≤0.016 0.5-0.8 0.1-0.3 0.17-0.37 ≤0.3 The rest ≤0.25 ≤0.0045
Fe is the basis.
According to TU 14-1-2687-79 the chemical composition is given for steel grade 50RA.
According to TU 14-1-2782-79, the chemical composition is given for steel grade 50RA, smelted in open electric arc furnaces. In the steel, deviations in chemical composition are allowed: in carbon ± 0.010%, in silicon ± 0.020%, in manganese ± 0.020%, in sulfur ± 0.0030%, in phosphorus ± 0.0030%, provided that the total mass fraction of sulfur and phosphorus will not be more than 0.0280%. Boron is introduced according to the calculation without fumes in an amount not exceeding 0.0045%, while the residual content in the steel should not be less than 0.0010%.

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