Provincial
Well-known member
Chromium-Molybdenum Steel was a very common high strength steel prior to WWII. The SAE grades of 4130 and 4140 were used for tubing and shafting respectively. Thinner sheet were made of 4130. 4140 had a higher carbon content to aid in heat treating.
I think you have Magnesium confused with Manganese, which is an alloying element for wear-resistant steel.
I think you have Magnesium confused with Manganese, which is an alloying element for wear-resistant steel.
















