Chemical composition and mechanical properties of 25Cr2Mo1VA, main uses Stop Check Valve,Cast Steel Globe Stop Check Valve,Stainless Steel Stop Check Valve,Cast Globe Stop Check Valve Jiangsu Hida Marine Valve Co., Ltd , https://www.haidavalve.com Material Name: 25Cr2Mo1VA
Material Name: High quality steel standard: GB/T 3077-1999
Chemical composition Carbon C: 0.22-0.29 Silicon Si: 0.17-0.37
Manganese Mn: 0.50-0.80
Molybdenum Mo: 0.90-1.10
Chromium Cr: 2.10-2.50
Vanadium V: 0.30-0.50
Phosphorus P: 0.035 (residual content)
Sulfur S: 0.035 (residual content)
Copper Cu: 0.30 (residual content)
Nickel Ni: 0.30 (residual content)
[heat treatment]
Quenching heating temperature (°C): 900;
Coolant: oil tempering heating temperature (°C): 640;
[Mechanical properties]
Tensile strength (σb/MPa): ≧ 930
Yield point (σs/MPa): ≧785
Elongation after break (δ5/%): ≧14
Area shrinkage (ψ/%): ≧55
Impact absorption work (Aku2/J): ≧63
Brinell hardness (HBS100/3000) (annealed or high temperature tempered state): ≦241
Main features Medium carbon heat resistant steel. Both strength and toughness are high. When the temperature is lower than 500 ° C, the high temperature performance is good, there is no tendency to be hot and brittle, the hardenability is good, the machinability is good, the cold deformation plasticity is medium, and the weldability is poor. Generally used in quenched and tempered state, can also be used after normalizing and high temperature tempering. For the manufacture of nuts under high temperature conditions (less than or equal to 550 ° C), bolts, studs (less than 530 ° C), long-term working temperature to 510 ° C fasteners, turbine rotor, sleeve, main steam valve, regulating valve It can also be used as nitriding steel to make valve stems, gears, etc.
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