FIELD: ferrous metallurgy. SUBSTANCE: steel has, wt.-%: carbon 0.36-0.44; silicon 0.25-0.45; manganese 0.5-0.8; chrome 0.85-1.50; titanium 0.02-0.04; aluminium 0.01-0.05; boron 0.003-0.005; calcium 0.001-0.004; copper 0.2-0.6; nickel 0.2-0.5; barium 0.01-0.04, and iron - the rest. Ratio Cu/Mn + Ni = 0.15-0.75. Steel is used for manufacture of machines working at alternating sign loading under condition of low temperatures (shafts, crankpin, axis). EFFECT: high strength, elasticity, fatigue strength, hardenability, cold-resistance and workability of steel. 2 tbl
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Year |
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