S7 Tool Steel
Product Overview
S7 Tool Steel is an air-hardening or oil-hardening tool steel known for its exceptional impact toughness. It is specifically designed for applications that require a unique combination of high strength and maximum resistance to shock and breakage.
With its relatively high chromium content, S7 also offers good wear resistance and excellent softening resistance at moderately high temperatures. If your tools are failing due to chipping or snapping, S7 is the ultimate solution.
1.S7 Tool Steel Typical Chemical composition:
C=0.45-0.55,Si=0.20-1.00,Mn=0.20-0.90,Cr=3.00-3.50,Mo=1.30-1.80,P≤0.03,S≤0.03
2. Delivery condition:
Hot rolled or forged,Black/ Grinding / Polishing / Milling / Machined Surface
Annealing(hardness max230HB)
EAF or ESR material
SEP 1921-84 Gr3, Class D/d
3. Size specification
S7Tool Steel Flat bar size dimension
| Thickness range(mm) | Width range(mm) | Length range(mm) | |
| Rolled Flat bar | 10-70 | 310-910 | 3000-5800 |
| Forged Flat bar | 75-500 | 310-910 | 3000-5800 |
| Diameter range(mm) | Length range(mm) | |
| Rolled Round bar | 10-60 | 3000-5800 |
| Forged Round bar | 65-500 | 3000-5800 |
4. Delivery time:
---10-15 days for ready stock
---30-60 days for new production products
5. S7 Tool Steel Key Features
Incredible Shock Resistance: Absorbs heavy impacts without fracturing, making it superior to D2 or A2 in high-shock environments.
Good Wear Resistance: Maintains a durable surface despite its primary focus on toughness.
High Hardness Capability: Can be heat-treated to 54-58 HRC, providing a solid balance of hardness and ductility.
Dimensional Stability: As an air-hardening steel, it exhibits minimal movement during heat treatment, reducing the risk of distortion in complex tools.
Versatility: Performs well in both cold-work and medium-temperature hot-work applications.
6.S7 Tool Steel Typical Application:
S7 Tool Steel is the"heavy-duty"choice for tools subjected to repeated, violent impact:
Pneumatic Tools: Chisels, hammers, and rivet sets.
Battering Tools: Drift pins, punches, and heavy-duty shear blades.
Cold & Hot Heading Dies: Where shock loading is a constant factor.
Plastic Injection Molds: Particularly for large molds or those requiring high polishability and toughness.
Master Hobs: For cold-forming other tool steels.
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