CHEMICAL COMPOSITION
|
Carbon
|
0.05 – 0.18%
|
|
Manganese
|
0.40 – 0.70%
|
|
Silicon
|
0.60% Max
|
|
Phosphorus
|
0.035% Max
|
|
Sulfur
|
0.035% Max
|
|
Nickel
|
0.50% Max
|
|
Chromium
|
2.00 – 2.75%
|
|
Molybdenum
|
0.90 – 1.20%
|
|
Copper
|
0.50% Max
|
|
Tungsten
|
0.10% Max
|
|
Total of residual elements
|
1.00% Max
|
PHYSICAL PROPERTIES
|
Tensile Strength
|
70,000 – 95,000 PSI
|
|
Yield Strength
|
40,000 PSI Min
|
|
Elongation at 2in.
|
20.0% Min
|
|
Reduction of area
|
35.0% Min
|