Best Selling Transmission System 45# Steel High-Toughness Bar

Forging transforms solid metal from one shape to another through plastic forming (hot or cold processing), while casting transforms liquid metal into a solid shape by pouring it into a mold. Forging improves mechanical properties, whereas casting focuses on melting and pouring processes.

High-quality forgings are selected through external observation (checking dimensions, surface defects like cracks or bubbles) and internal testing (analyzing chemical composition, macroscopic/microscopic structures, and mechanical properties like tensile strength and hardness using specialized instruments).

The process for circular forgings includes pier roughening, elongation, punching, and expanding. Free forging uses a horse screw to expand holes, while ring rolling uses rolling. Both are solid-state plastic forming processes.

The bar is made of 45# structural carbon steel, which has 0.42-0.50% carbon content. It offers low price, good cutting performance, and high strength, toughness, and wear resistance after quenching and tempering.

The product is certified under GB/T19001-2016 and ISO9001:2015 standards. The company also provides quality certification documents and performs flaw detection at all levels according to customer requirements.