40Mn, to be delivered in either non-heat treated or heat treated (annealing, normalizing, or high-temperature tempering) condition. Delivery in heat treated condition should be specified in the contract; otherwise, it will be delivered without heat treatment.

● Chemical Composition:

Carbon (C): 0.37~0.44

Silicon (Si): 0.17～0.37

Manganese (Mn): 0.70～1.00

Sulfur S: ≤0.035

Phosphorus (P): ≤0.035

Chrome (Cr): ≤0.25

Nickel (Ni): ≤0.30

Copper (Cu): ≤0.25