Isis Metals, a trusted supplier of specialty tool steels based in Manila, Philippines, proudly presents its top-notch **S1 Tool and Die Steel Bars**. These bars are crafted for applications that demand exceptional toughness and shock resistance. S1 is a silicon-manganese-molybdenum alloy tool steel, specifically designed for cold work tools that face repeated impacts and abrasive wear. Perfect for forging, stamping, and heavy-duty forming, S1 ensures reliable performance even in the toughest conditions. Isis Metals offers S1 bars in a variety of sizes and conditions, providing toolmakers, fabricators, and manufacturers with durable, consistent material solutions tailored for high-impact tooling environments.
Typically, S1 tool steel comprises about 0.50% carbon, 2.00% silicon, 0.30% molybdenum, and 1.50% manganese. This unique blend gives it remarkable shock resistance and decent wear resistance at low to moderate temperatures. With the right heat treatment, S1 can reach a hardness of 58–62 HRC while still retaining enough ductility to avoid cracking under impact. The inclusion of silicon boosts toughness and heat resistance, making S1 an excellent choice for tools that experience dynamic stress. Its tensile strength varies between 1,400 to 1,700 MPa, depending on its condition, and it is oil-hardened, ensuring good dimensional stability during the hardening process.
| 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 and Die Steel Bars are mainly utilized in tools that operate in high-impact, cold working environments. Common applications include cold chisels, hammer dies, shear blades, punches, drift pins, and impact tools used in forging and forming tasks. S1 is particularly ideal for operations that involve repeated striking or deformation, such as hand tools and tooling components in blacksmithing.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Isis Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Manila, Philippines
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