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What Is S7 Tool Steel?

S7 tool steel is a type of high-performance tool steel that is widely used in tool and die making applications. It is a shock-resistant air-hardening steel that contains high levels of carbon, chromium, molybdenum, vanadium, and tungsten. The combination of these elements gives S7 tool steel its exceptional hardness, toughness, and wear resistance.

S7 tool steel is known for its ability to maintain its shape and sharpness even under high impact loads, making it an excellent choice for applications that require high levels of durability and toughness.

AISI S7 UNS T41907/DIN 1.2357
FusionTG Color Code Dark Blue
Offered As Availability
Sheet Yes - Upon Request
Plate Yes
Cut Bar Yes
Blocks Yes
Rounds Yes
Forging Yes
Drill Rod Yes
Flat Ground Stock Yes
Typical Chemical Composition Minimum - Maximum Value
Carbon (C) 0.45% - 0.55%
Manganese (Mn) 0.20% - 0.80%
Silicon (Si) 0.20% - 0.50%
Chromium (Cr) 3.00% - 3.50%
Vanadium (V) 0.20% - 0.30%
Molybdenum (Mo) 1.30% - 1.80%
Maximum Rockwell C Hardness Obtainable 60 HRC
Supplied In Annealed Condition 229 BHN

S7 steel is a popular choice for a variety of industrial and commercial applications that require high performance and durability. Some typical applications of S7 steel include:

  • Punches and dies: S7 steel's high toughness and wear resistance make it an ideal material for creating punching and forming tools.
  • Shear blades: S7 steel's high impact resistance and toughness make it an excellent choice for creating shear blades, which are used to cut through metal sheets and other materials.
  • Chisels and hammers: S7 steel's ability to maintain a sharp edge even under heavy use makes it an excellent material for creating chisels and hammers.
  • Cold work tooling: S7 steel's high wear resistance and dimensional stability make it a popular choice for cold work tooling applications such as forming and blanking dies.
  • Injection molding: S7 steel is commonly used to create molds for plastic injection molding due to its high hardness and resistance to wear.

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