Starc Metals is a reliable manufacturer and supplier located in Canberra, Australia, with a focus on high-quality Tool and Die Steel S7 Bars. Renowned for our precision engineering and top-notch product standards, we provide materials that can handle the toughest industrial challenges. Our S7 Tool Steel Bars are celebrated for their remarkable shock resistance, toughness, and wear performance, even in the harshest conditions. Thanks to our advanced manufacturing techniques and strict quality control, each S7 Bar is crafted to ensure superior reliability, durability, and consistency—making it the go-to choice for toolmakers, engineers, and industrial manufacturers throughout Australia.
Tool and Die Steel S7 Bars are made up of carbon (0.45–0.55%), manganese (0.20–0.80%), silicon (0.20–1.00%), chromium (3.00–3.50%), molybdenum (1.30–1.80%), and vanadium (0.20–0.35%). This unique blend gives S7 steel its exceptional impact toughness, high hardenability, and solid wear resistance. After heat treatment, it maintains a hardness of 54–56 HRC while still offering excellent ductility. Plus, S7 steel experiences minimal distortion during hardening, making it perfect for tools that face repeated shock or impact loads without sacrificing strength or dimensional stability.
| ASTM A681-2008 | C | Si | Mn | P | S | Cr | V | Mo | ||||||
| S7/T41907 | 0.45 | 0.55 | 0.20 | 1.00 | 0.20 | 0.90 | 0.03 | 0.03 | 3.00 | 3.50 | – | 0.35 | 1.30 | 1.80 |
| DIN ISO 4957 | C | Si | Mn | P | S | Cr | V | Mo | ||||||
| 1.2355/50CrMoV13-15 | 0.45 | 0.55 | 0.20 | 0.80 | 0.50 | 0.90 | 0.03 | 0.02 | 3.00 | 3.50 | 0.15 | 0.35 | 1.30 | 1.70 |
| 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 |
| Country | USA | German |
| Standard | ASTM A681 | DIN EN ISO 4957 |
| Grades | S7/T41907 | 1.2355/50CrMoV13-15 |
| Properties | Conditions | ||
|---|---|---|---|
| T (°C) | Treatment | ||
| Thermal expansion | 12.6 x 10-6/ºC | 20-200 | – |
The standard annealing temperature for Tool and Die Steel S7 bars is typically around 1,600°F to 1,650°F (871°C to 899°C), followed by slow cooling to relieve internal stresses.
Yes, Tool and Die Steel S7 bars are available in custom lengths and shapes, often tailored to specific customer requirements, ensuring versatility for various tooling and die applications.
Tool and Die Steel S7 Bars are commonly used in applications that require high impact strength and durability. They’re perfect for crafting chisels, punches, shear blades, rivet sets, forming dies, and other impact-resistant tools. Thanks to their ability to maintain toughness at both high and low temperatures, S7 Bars find their place in the aerospace, automotive, and heavy engineering sectors. Their resistance to cracking and chipping under intense shock loading makes them ideal for tools that endure dynamic stress. The versatility and strength of S7 steel make it a favored material for critical tooling operations.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Starc Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Canberra, Australia
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