Semih Metals, an Istanbul, Turkey-based company, is a trusted Tool and Die Steel S1 bar manufacturer and supplier providing high-impact resistant steel for tooling purposes. Focused on quality and precision, Semih Metals provides S1 steel bars that conform to international requirements and provide consistent performance in harsh environments. Supplying industries like tooling, forging, and manufacturing, the company achieves ultimate durability, toughness, and heat resistance in all its steel products. Semih Metals combines superior manufacturing processes with rigorous quality control to match the specialized demands of tool and die usage globally.
Tool and Die Steel S1 is an impact-resistant tool steel renowned for outstanding toughness, high-impact strength, and moderate wear resistance. It generally includes carbon (0.5–0.6%), chromium, tungsten, and vanadium, which impart its hardenability and strength. S1 steel is easily machinable in the annealed state and retains its strength and toughness after heat treatment. It generally exhibits a typical hardness of 54–58 HRC after tempering and hardening. The steel is also resistant to softening at high temperatures and hence can be used for hot and cold work operations with high impact.
| C | Mn | Si | Cr | Ni | Mo | W | V | Cu | P | S |
| 0.40-0.55 | 0.10-0.40 | 0.15-1.20 | 1.00-1.80 | 0.30 | 0.50 | 1.50-3.00 | 0.15-0.30 | 0.25 | 0.03 | 0.03 |
| Properties | Metric | Imperial |
|---|---|---|
| Hardness, Rockwell C (air cooled from 899°C, 30 mins) | 54.5 | 54.5 |
| 56 | 56 | |
| Hardness, Rockwell C (air cooled from 982°C, 30 mins) | 56.5 | 56.5 |
| Modulus of elasticity | 207 GPa | 30000 ksi |
| Charpy impact (V-notch; oil quenched from 954°C; 149°C temper temperature) | 10.8 J | 8.00 ft-lb |
| Charpy impact (V-notch; oil quenched from 954°C; 625°C temper temperature) | 29.8 J | 22.0 ft-lb |
| Machinability (1% carbon steel) | 70.0 – 75.0% | 70.0 – 75.0% |
| Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
| AISI / SAE | DIN / W.Nr | UNS | JIS | GB | AFNOR |
| S1 | 1.2550 | T41901 | G4053 | GB/T 3077 | 55 WC 20 |
| Properties | Conditions | ||
|---|---|---|---|
| T (°C) | Treatment | ||
| Thermal expansion | 12.4 x 10-6/ºC | 20-100 | – |
When choosing Tool and Die Steel S1 bars, consider hardness, wear resistance, toughness, machinability, heat treatment capabilities, and the specific requirements of the application to ensure optimal performance and durability.
Tool and Die Steel S1 bars resist corrosion due to their alloy composition, which includes elements like chromium and molybdenum. These elements form a protective oxide layer, enhancing resistance to oxidation and rust.
S1 tool steel bars are generally applied in uses where optimum toughness and impact resistance at both hot and cold temperatures are needed. The most common applications include shears, punches, shear blades, dies, and forming tools that are subjected to repeated impact or shock loading. In metal stamping and forging, S1 best suits tools withstanding high mechanical stress. It is also applied in heavy machinery manufacturing and aerospace, where tool brittle fracture must be prevented. The fact that S1 can withstand cracking and retain hardness under stress makes it a reliable option in heavy-duty tool and die use.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Semih Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Istanbul, Turkey
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