Key Specifications/Special Features:
Description:
Special structural steel
Applications:
Special purpose production
Parts of larger cross-sections where higher toughness is demanded, for gears, crankshafts
Physical properties (avarage values) at ambient temperature:
Modulus of elasticity: 210103 x N/mm2
Density: 7.80g/cm3
Soft annealing:
Heat to 620 to 660oC, cool slowly in furnace
This will produce a maximum Brinell hardness of 255
Intermediate annealing:
Temperature: 600 to 630oC
Carburizing:
Temperature: 860 to 890oC
Hardening:
Harden from a temperature of 780 to 810oC followed by oil quenching or thermal bath at 180 to 220oC
Tempering:
Tempering temperature: 150 to 180oC
Forging:
Hot forming temperature: 1050 to 850oC
| C |
Mn |
Si |
P |
S |
Cr |
Ni |
Mo |
| 0.03 |
0.5 |
0.5 |
0.02 |
0.005 |
11.5~13.5 |
4.5~6.5 |
1.5~3.5 |
Mechanical behavior
State: hardening and tempering state. The supply status is typically 95 or 110 ksi, 0.2% yield strength
Extreme tensile strength: 115 ksi or more (792N / mm2)
0.2% Yield point: 110 ksi or more (758 N / mm2)
Elongation: 15%
V-notch impact strength (-10 ° C): 78 Joules (60ft-lbf)
Hardness: 33%
Audited Supplier 
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