Ni, Cr and Mo all increase the hardenability of steel. In general, Ni is the most expensive per unit of increased hardenability, but is warranted when toughness is a primary consideration.

Chromium brings resistance to corrosion and oxidation, high temperature strength and abrasion resistance.

Molybdenum increases hardenability and helps maintain a specified hardenability. It also increases high temperature tensile and creep strengths. These grades are generally heat treated to specified properties.

Grade Designation:  43XX, 43BVXX, 47XX, 81XX, 86XX, 87XX, 88XX, 93XX, 94XX, 97XX, 98XX, PSXX (Formerly EX grades)

Click the links below to view
Chemical Composition Ranges
and Limits Charts.