9Cr18 stainless iron, 9Cr18Mo stainless iron, and 9Cr18MoV stainless iron all belong to high-carbon, high-chromium martensitic stainless steels, yet each has its own specific characteristics. Now, let's compare them one by one.

9Cr18 stainless iron exhibits excellent properties such as high hardness, high wear resistance, and corrosion resistance after quenching, making it suitable for manufacturing plastic molds that endure high wear, high loads, and exposure to corrosive media.

Compared to 9Cr18 stainless iron, the addition of Mo enhances the passivation of the steel, so 9Cr18Mo stainless iron offers high hardness and wear resistance after quenching, along with improved dimensional stability at both high and low temperatures. 9Cr18Mo stainless iron is primarily used for manufacturing bearings in corrosive environments such as seawater, river water, nitric acid, steam, and marine conditions, including bearings for ships, submersible pump components, petroleum and chemical machinery, and navigational instrument bearings.

9Cr18MoV stainless iron is currently the ideal choice for making cutting tools. The addition of V achieves a perfect balance of strength and toughness, making it highly suitable for manufacturing stainless steel blades, mechanical cutting tools, shearing tools, surgical blades, and high-wear-resistant equipment parts.

3Cr2W8V—Die Steel‖, 5CrNiMo, 9CrSi‖Die Steel, GCr15 Bearing Steel, ‖60Si2Mn Spring Steel, 35CrMo—Alloy Steel, 40Cr—Gear Steel, 38CrMoAl—Machinery Steel, 20CrMnTi, 42CrMo, W6Mo5Cr4V2—High-Speed Steel, SKH-9 High-Speed Steel, Electric Furnace, Electroslag H13—Die Steel‖, Cr12MoV—Die Steel, LD—Die Steel, Alloy Steel, High-Speed Steel Round Bar, and H13—Electroslag Module, P20—Die Steel, 718H—Die Steel, 2738, NAK80, S136 Plate Module

Cold Work Die Steel: Cr12MoV, Cr12Mo1V1, SKD11, D2, CrWMn, LD, DC53
Hot Work Die Steel: 5CrNiMo, 5CrNiMoV (1.2714), SWQH13, SWMD, 1.2367, DSAMAX, 3Cr2W8V
Plastic Mold Steel: SWP20, SW718H, S136, 4Cr13
Alloy Tool Steel: 9CrSi