Toolman Special Steels is proud to produce and offer S7 1.2357 steel. S7 is a general purpose air hardening tool steel having high impact and sock resistance. This steel product has a special property combination of high impact resistance and toughness. It can be easily processed and heat treated. It has good softening resistance at medium temperatures and often used in the shock resisting applications.
Steel Properties
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High impact resistance
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Good wear resistance
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Good toughness with high strength
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High hardenability
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Softening resistance
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Good Polishability
Chemical Composition
| Element | C (%) | Si (%) | Mn (%) | P (≤ %) | S (≤ %) | Cr (%) | Mo (%) | V (%) |
|---|---|---|---|---|---|---|---|---|
| Min (%) | 0.45 | 0.20 | 0.20 | - | - | 3.00 | 1.30 | 0.00 |
| Max (%) | 0.55 | 1.00 | 0.90 | 0.030 | 0.030 | 3.50 | 1.80 | 0.35 |
Mechanical Properties
| Property | Value |
|---|---|
| Annealing Hardness (HBW) | 229 max |
| Quenching and Tempering Hardness (HRC) | 56 min |
Physical Properties
| Property | Value |
|---|---|
| Density (g/cm³) | 7.76 |
Modulus of Elasticity
| Temperature (°C) | GPa |
|---|---|
| 20 | 210 |
Thermal Properties
| Temperature (℃) | Thermal Expansion Coefficient (10^-6/℃) |
|---|---|
| 400 | 13.8 |
| 500 | 14.1 |
Thermal Conductivity
| Temperature (℃) | Thermal Conductivity (W/m•K) |
|---|---|
| 20 | 28.5 |
HEAT TREATMENT AND PROCESSES
Heat treatment
| Soft annealing °F | Cooling | Hardness HB |
|---|---|---|
| 1130 - 1200 | Furnace 20°F/hr to 930°F then air cool | Max 229 |
| Stress-relief annealing | Temperature and Cooling |
|---|---|
| Annealed Parts | 1200°F - 1250°F Hold time 2 hours, slowly cool to 930°F, then air cool |
| Hardened Parts | Heat to 25°F - 50°F below the original tempering temperature, hold for 2 hours, then cool in air |
| Hardening °F | Quenching | Hardness after quenching HRC |
|---|---|---|
| 1690°F - 1775°F Hold at temperature for 30 minutes | Furnace quench to 350°F, air cool to 120°F. Immediately temper | 60 - 62 |
| Tempering °C | HRC |
|---|---|
| 100 | 60 |
| 200 | 58 |
| 300 | 54 |
| 400 | 53 |
| 500 | 53 |
| 600 | 44 |
Applications
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Compression molds
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Tablet compression dies
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Injection mold
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Shears
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Blanking dies
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Punches
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Chisels
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Rivet sets
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Driver bolts
Quality Assurance
Our S7 1.2357 steel undergoes rigorous testing and quality control to meet international standards, ensuring consistent performance and reliability. Certificates and test reports are available upon request. Feel free to reach out to us for more information on our S7 steel products or to discuss your specific requirements. We're dedicated to providing top-quality steel solutions that meet your needs and exceed your expectations.
Manufacturing Range
| Products | Diameter (mm) |
|---|---|
| Hot Rolled bar | 8 - 65 |
| Forged and Turned bars | 65.2 - 500 |
| Forged Square Bars | 50 - 500 |
Flats
| THICKNESS | WIDTH |
|---|---|
| 6.00 mm - 410.00 mm | 20.00 mm - 700.00 mm |