Stainless Steel AISI 420 (Martensitic)

Balls of this material have a lower chrome content than 440C, and are used in application where the more rigid corrosion resistance requirements can be relaxed. They have fair resistance to fresh water, steam, oil gasoline, blood, perspiration, alcohol and food environment. However will not pass 40 hours salt spray test.

International Equivalents

AISI 420, JIS SUS 420, JI X20 CR13, Z40 C13, EN56D, Wks 1.4034

Material Specification


C 0.15 – 0.36 %
Cr 12 – 14 %
Si 1.0 % Max
Mn 1.0 % Max
P 0.04 % Max
S 0.03 % Max



HRc 52 – 55


Mechanical Properties

Tensile Strength 275,000 psi
Specific Weight 0.280 lbs/cu in


Size Range

1.588mm (1/16″) to 50.80mm (2″)


Standard Grades Available


VTLG Asia is the first Asian-based German supplier of products and services to the capital equipment and Industrial component industry. For inquiries and requests please contact us at: VTLG specializes in supplying ball products to the linear guide, ball screw and ball retainer industry.