42crmo High Strength Alloy Structural Steel Plate

　　42CrMo steel plate is ultra-high strength alloy structural steel, characterized by high strength and toughness, good hardenability, no obvious temper brittleness, high fatigue limit and multi-impact resistance after quenching and tempering treatment, good low temperature impact toughness. 42crmo high strength alloy structural steel plate is suitable for the manufacture of large and medium-sized plastic molds requiring a certain strength and toughness.
 

　　42crmo steel sheet material properties

　　42CrMo has high creep strength and long-lasting strength at high temperatures. The steel usually has a surface quenching after quenching and tempering as a heat treatment scheme. As a plastic mold steel, it has excellent workability and good mechanical properties.
 

　　42crmo steel Plate Equivalent

　　Its corresponding international standard organization number: 42CrMo4

　　Corresponding Japanese grade: SCM440

　　Corresponding to the German grade: 42CrMo4

　　Approximate to the ASTM grade: 4140

　　Chemical Composition of 42crmo Steel Plates

　　Carbon C: 0.38 to 0.45%

　　Silicon Si: 0.17~0.37%

　　Manganese Mn: 0.50 to 0.80%

　　Sulfur S: Allowable residual content ≤0.035%

　　Phosphorus P: Allowable residual content ≤0.035%

　　Chromium Cr: 0.90 to 1.20%

　　Nickel Ni: Allowable residual content ≤0.30%

　　Copper Cu: Allowable residual content ≤0.30%

　　Molybdenum Mo: 0.15 to 0.25%
 

　　42crmo Steel Plate Physical Properties

　　1) Critical point temperature (approximate): Ac1 = 730 ° C, Ac3 = 800 ° C, Ms = 310 ° C.

　　2) Linear expansion coefficient: temperature 20~100°C/20~200°C/20~300°C /20 ~400°C/20~500°C /20~600°C, linear expansion coefficient: 11.1×10K /12.1 × 10K / 12.9 × 10K / 13.5 × 10K / 13.9 × 10K14.1 × 10K.

　　3) Modulus of elasticity: temperature 20 ° C / 300 ° C / 400 ° C / 500 ° C / 600 ° C, elastic touch 210000MPa / 185000MPa / 175000MPa / 165000MPa / 15500oMPa 
 

　　42crmo Steel Plate Characteristics And Application

　　This material is featured with high strength, hardenability, good toughness, small deformation during quenching, high creep strength and long-lasting strength at high temperatures. Forgings requiring higher strength and larger quenching section than 35CrMo steel, such as large gears for locomotive traction, supercharger transmission gears, pressure vessel gears, rear axles, extremely loaded connecting rods and spring clips. 42crmo alloy can also be used for oil deep well drill pipe joints and fishing tools below 2000m, and can be used for molds of bending machines.

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