Machining Square Forged AISI 4140 Solid Steel Block Forging Bar

Forging transforms solid metal from one shape to another through plastic deformation, while casting transforms liquid metal into a solid shape by pouring it into a mold. Forging improves mechanical properties, whereas casting is suitable for complex shapes.

Select forgings by checking external dimensions and surface defects like cracks or bubbles. Internally, verify chemical composition, mechanical properties, and use specialized instruments to detect internal defects like shrinkage or dendrites.

The process includes pier roughening, elongation, punching, and expanding. Ring rolling uses rolling to expand holes, while free forging typically uses a horse screw for this step.

The primary material is AISI 4140 or 45# carbon structural steel, known for good cutting performance, high hardness after quenching, and excellent strength and toughness.

The product is certified under GB/T19001-2016 and ISO9001:2015 standards, ensuring quality management and product consistency.