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

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