S7 (1.2357) Cold work tool steel

Specification

AISI S7 tool steel is a shock-resistant air hardening steel. AISI S7 steel has exceptional impact properties plus the highest hardenability of shock resisting grades of tool steel. Steel S7 also possesses good softening resistance at high temperatures which gives it hot work capabilities. Since S7 steel hardens in air, it is also safe and stable in heat treatment. AISI S7 tools steel has an unusual combination of properties, making it suitable for an extremely wide range of tool and die work – where shock-resistance, medium hot-work properties, or ease of machining and heat-treatment are most important.

Application

Because of its unusual combination of properties, S7 tool steel is suitable and versatile for a wide range of tool and die applications. AISI S7 Steel can be used for hot and cold shock applications, medium hot-work dies and medium-run cold work tools and dies.Other uses include: Bull Riveters, Concrete Breakers (Moll Points), Riveting Dies, Powder Metal Dies, Notching Dies, Dowels, Drills, Drill Plates, Hubs, Plastic Mold Dies, Cold Forming Dies, Blanking Dies, Bending Dies, engraving dies, machined cavities for plastic molding dies, die-casting dies, shear blades and Master Hobs.

Chemical Analysis %

C	Mn	Cr	Si	V	MO	P	S
0.45-0.55	0.20-0.90	3.00-3.50	0.20-1.00	0.35 MAX	1.30-1.80	0.030 Max	0.030 Max

Delivery condition
Annealed 230 HB MAX
Heat Treatment

Soft Annealing	Cooling	Hardness	Hardening	Quenching	Hardness after quenching HRC
810-850°C	Furnace	230HB MAX	940-980°C	Oil or thermal bath,180-220°C	62

Tempering °C

Tempering°C	100	200	300	400	500	600
HRC	62	57	54	53	51	49