Introduction to high hardness stainless steel: 9Cr18
9Cr18 is a high hardness stainless steel. The steel has high hardness and wear resistance; good corrosion resistance in the atmosphere, water, seawater and certain acids and salts in aqueous solutions; good cutting properties, but poor weldability; suitable for the manufacture of wear-resistant parts working in corrosive environments.
(1) Material grades. 9Cr18
(2) Similar grades. 95X18 (Russia), (440C) (USA), SUS440C (Japan).
(3) Technical standards of the material. See table below.
(4) Chemical composition.
(5) Heat treatment system. Rods and forgings: 1050°C oil quenched and tempered to the required hardness. Wire: 800~840°C annealed.
(6) Species specifications and supply status.
1. Species specifications. See the table below for the provisions of the standards.
2. State of supply. Bar and wire are supplied in annealed condition.
(7) Melting and casting process. Can be smelted in electric arc furnace, electric arc furnace + electroslag remelting and other processes.
(8) Application profile and special requirements. Has been used for ball bearings, bearing bushings, bushings, valve bushings in fuel accessories, etc. Due to the high carbon content, it is prone to cracking in production, especially during forging, and should be noted.