21CRMOV5-11 STEEL
1.7709 STEEL
21CrMoV5-7 alloy
20CDV5.07 Steel
20CDV5-07 Steel
Standard: DIN17240-1976
Chemical composition
C: 0.17-0.25
Si: 0.15-0.35
Mn: 0.35-0.85
S: ≤0.035
P: ≤0.030
Cr: 1.20-1.50
Mo: 0.65-0.80
V: 0.25-0.35
Heat treatment state: 890-940ºC quenching, 680-720ºC tempering (at least 2h)
Yield strength, N/mm² : min.550
Tensile strength, N/mm² : 700-850
Elongation, % : min.16
Shrinkage rate, % : min.60
Absorbed work DVM, J: min.63
Elastic modulus, N/mm² : 211
Density, Kg/dm³ : 7.85