In tool steel standard ASTM A681, shock-resisting tool steels are designated as group S steels according to the AISI classification system. S1, S2, S5, S6, and S7 are the types of shock-resisting tool steels. 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.
| Carbon: | Chromium: | Molybdenum: | Manganese: | Vanadium: | Silicon: | Phosphorus: | Sulfur: |
| 0.45/0.55 | 3.10/3.40 | 1.30/1.60 | 0.50/0.70 | 0.20/0.30 | 0.20/0.40 | 0.025 max | 0.030 max |
| Properties | Metric |
| Hardness, Rockwell C (air cooled from 941°C, 649°C temper temperature) | 41 |
| Hardness, Rockwell C (air cooled from 941°C, 449°C temper temperature) | 53 |
| Hardness, Rockwell C (air cooled from 941°C, 149°C temper temperature) | 57 |
| Modulus of elasticity | 207 GPa |
| Charpy impact (V-notch; air cooled from 941°C; 425°C temper temperature) | 13.6 J |
| Charpy impact (V-notch; air cooled from 941°C; 649°C temper temperature) | 16.3 J |
| Charpy impact (V-notch; air cooled from 941°C; 200°C temper temperature) | 16.9 J |
| Machinability (1% carbon steel) | 70.0 – 75.0% |
| Poisson’s ratio | 0.27-0.30 |
| item | value |
| Grade | s7 |
| Type | Alloy Plate |
| Application | aerospace auto parts building etc. |
| Width | 1250mm-6200mm custom size |
| Surface Treatment | Anodized Polished etc. |
| Alloy Or Not | Is Alloy |
| Place of Origin | China |
| Shandong | |
| Model Number | 5052 5754 5083 |
| Tolerance | 1MM |
| Processing Service | Bending, Decoiling, Welding, Punching, Cutting |
| Color | Silver |
| Shape | sheet Plate |
| Surface | Smooth Anodized Polishing |
| Certification | ISO9001/SGS |
| Material | Alloy Metal |
| Standard | GB/T3880 |
| Technique | Cold Rolled Hot Rolled |
| Delivery Time | 5-10DAYS |
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