CarTech S7 Steel

CarTech S7 Steel

Steel name: S7
Diagram No.: 2303
AISI/SAE designation: S7
Chemical composition in weight %: 0.50% C, 0.30% Si, 0.70% Mn, 3.25% Cr, 1.40% Mo
Steel group: Tool steels
Properties: CarTech S7 is a general purpose air hardening tool steel having high impact and shock resistance. It has good resistance to softening at moderately high temperatures. This combination of properties makes it suitable for many hot-work and cold-work applications.
Applications: Tool steel applications.
Reference: Not shown in this demo version.

Heat Treatment
Hardening: Tools made of Carpenter S7 tool steel may be hardened by placing them in the furnace maintained at a temperature of 1700/1750°F (927/954°C). Let the tools heat naturally to the furnace temperature, soak for 20 minutes plus 5 minutes per inch (25.4 mm) of maximum thickness and quench. Sections up to 2 ½" (64.5 mm) thick may be cooled in air. Heavier sections, i.e., with section thickness larger than 2 ½", should be oil quenched to 150°F (66°C). Temper as quickly as possible after the hardening operation.
Tempering: The best combination of hardness and toughness is obtained by tempering at about 400°F (204°C). This tempering temperature is therefore suggested for cold-work applications. Tempering at 900/1000°F (482/538°C) is usually desirable for hot-work applications.
Diagram note: No data

Effect Tempering Temperature on Hardness

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Other Steel Data links
Carbides in Steel
CCT and TTT Diagrams of Steels
CCT and TTT Diagram Calculating Service
Hardenability Diagrams of Steels
Hardenability Calculating Service
Macro Defects in Steel
Metal Etchants
Non-Metallic Inclusions in Steel
Semiconductor Etchants

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