S-1 Shock Resisting Tool Steel


S-1 is a medium-carbon steel which combines moderate hardness with good impact toughness. It is a deep-hardening, oil-hardening steel designed for shock and impact loading applications.

Analysis:

C CO CR MN MO NI P S SI V W
0.40 - 0.55 1.00 - 1.800.10 - 0.400.50 Max. 0.03 Max.0.03 Max.0.15 - 1.200.15 - 0.301.50 - 3.00

Designations:

AFNOR 55 WC 20-France
DIN 1.2550-Germany
UNI 58 WCr 9 KU-Italy
ASTM A681-US
FED QQ-T-570-US
SAE J438-US
UNS T41901-US
AISI S1 Tool Steel-US

Data is typical and should not be construed as actual values for any category.
Applications and technical information require engineers and tool designers to exercise independent judgement.