AISI S7

Typical analysis

C	Cr	Mo
0.50	3.25	1.40

Designed for use where the ability to withstand repeated blows at normal operating temperatures is more important than the ability to resist wear and abrasion.

Typical applications

Hand and pneumatic tools for chipping, punching, riveting, as well as drift pins, grippers, mandrels, heavy duty blanking and forming dies and shears blades.

Thermal Treatments	Degrees Celsius
Forging	1120°C - 950°C
Annealing	815°C - 840°C Tensile strength as Annealed ( 45 - 52 tons per Sq. inch ) Hardness: 187 - 223 BHN
Hardening	925°C - 950°C
Tempering ( maximum wear )	205°C - 260°C
Tempering ( maximum toughness )	480°C - 540°C
Quenching medium	Air ( Section greater than 2 - 1/2" flash oil quench )
Obtainable hardness ( HRC )	45 - 57
Wear resistance	Medium
Toughness	Very high
Distortion in heat treating	Lowest
Machinability	Medium
Red hardness	High