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C0.38-0.43;Mn0.6-0.8;P≤0.035;S≤0.04;Si≤0.15-0.35;Ni≤1.65-2.0;Cr0.7-0.9;Mo0.2-0.3
Steam turbine shaft, blades, high-load transmission parts and fasteners.
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C0.41-0.46;Mn0.65-0.95;Si≤1.45-1.8;Ni≤1.6-2.0;Cr0.7-0.9;Mo0.3-0.4; V≥0.05
Steel for aircraft landing gear.
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