What the SAE1045 and 45# steel difference in chemical composition?

The carbon content of SAE1045 and 45# steel is 0.01% carbon less than the lowest value of the American standard. However, in terms of manganese content, the manganese content of SAE1045 carbon steel is 0.1% higher than the lowest and highest value of 45# steel. In addition, there are other alloying elements that have not made corresponding agreements. Mn alloy in steel can improve steel toughness, strength, hardness, wear resistance and wear resistance. Improve the hardenability of steel and improve the hot workability of steel. Increased manganese content reduces corrosion resistance and welding performance.

SAE1045 cold-rolled coil can supply spot specifications:

Thickness: 0.2mm~6.0mm

Width: 15mm~620mm or 1000mm~1250mm

Hardness: cold hard (hrb89~ hrb 105)

Soft state (hrb75~ hrb 85)

Hardened (hrc27~ hrc 60)

SAE1045 cold rolled coil and sheet surface treatment: bluish, black, polished, bright, mirror