Description
S7 Round Bars / 1.2357 Round Bars
S7 Round Bars is a shock resistant Air Hardening Steel. The impact properties plus very high hardenability of shock resisting grades of tool steel make this steel indispensable to the tablet tool industry. S7 also possesses good softening resistance at high temperatures which gives it hot work capabilities. S7 maintains stability in heat treatment.
It has unusual combination of properties making it suitable for an extremely wide range of tool and die work. Shock resistance and medium hot work properties or ease of machining and heat treatment are the most important.
Excellent toughness and high strength, along with a low to medium wear resistance. Versatile tool steel for both cold and warm shock applications.
S7 Tool Steel is a Shock Resistant grade containing high impact properties. As an air-hardening grade, S7 is stable for heat treatment, and its combination of high machinability and dimensional stability makes it ideal for a variety of different tool and die work.
S7 Chemical Composition of AISI S7 Round Bars :
| Grade | S7 Round Bars | |
| % | Min. | Max. |
| C | 0.45 | 0.55 |
| Mn | 0.20 | 0.80 |
| Si | 0.20 | 1.00 |
| Cr | 3.00 | 2.50 |
| Mo | 1.38 | 1.46 |
| V | 0.23 | 0.31 |
| P | – | 0.015 |
| S | – | 0.008 |
Applications of AISI S7 Round Bar :
- • Tablet Tool Punches & Dies
- • Cold Forming Dies
- • Blanking Dies
- • Bending Dies
- • Engraving Dies
- • Shear Blades
- • Master Hobs
- • Chisels
- • Punches
- • Moll Points
- • Gripper Dies
- • Riveting Dies
- • Hot Headers
S7 is recommended for applications that require a high level of shock resistance, medium hot-work properties and/or ease of machining. Short-run dies used in cold-forming, blanking and bending also use S7.
Heat Treatment :
This is the process of heating metal to an elevated temperature to obtain change in properties of metallurgical structure. The heat treatment for S7 is as follows:
| Forging | 1800-2100°F |
| Annealing | 1500-1600°F |
| Hardening | 1725-1850°F |
| Tempering | 400-1150°F |
S7 Tool Steel Round Bar Stock Sizes:
- • 10 mm Dia S7 Tool Steel Round
- • 20 mm Dia S7 Tool Steel Round
- • 30 mm Dia S7 Tool Steel Round
- • 40 mm Dia S7 Tool Steel Round
- • 50 mm Dia S7 Tool Steel Round
- • 60 mm Dia S7 Tool Steel Round
- • 65 mm Dia S7 Tool Steel Round
- • 70 mm Dia S7 Tool Steel Round
- etc.
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