Detailed Product Description
Performance Characteristics:
High strength, high tenacity, good hardenability, and high resistance to thermal properties.
Applications:
Used for the important quenched and tempered parts which request high strengh , high toughness and large section size, such as the transmission of the horizontal forging machine eccentric shaft, forging crankshaft.It is also used for manufacturing big sized important quenched-and-tempered parts which request good toughness and high strength. such as top load shaft ,steam turbine shaft, vane, and heavy-load transmission parts, fastening piece, crankshaft, gears etc.
Chemical Composition(%):
|
Standard |
Steel Grade |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
|
DIN |
1.6511 |
0.35-0.43 |
≤0.40 |
0.50-0.80 |
≤0.025 |
≤0.035 |
0.60-1.00 |
0.15-0.25 |
0.70-1.20 |
|
ASTM |
4340 |
0.38-0.43 |
0.15-0.35 |
0.60-0.80 |
≤0.035 |
≤0.040 |
0.70-0.90 |
0.20-0.30 |
1.65-2.00 |
|
GB |
40CrNiMoA |
0.37-0.44 |
0.17-0.37 |
0.50-0.80 |
≤0.025 |
≤0.025 |
0.60-0.90 |
0.15-0.25 |
1.25-1.65 |
Annealed Hardness:
|
HBS≤248 |
Process Of Production
|
EAF+LF+VD+ESR+Forged +Heat Treatment(optional) |
