Chuck Metals, a reliable manufacturer and supplier located in Singapore, Pulau Ujong, provides top-notch Tool and Die Steel S7 Bars designed for outstanding impact strength and toughness. Renowned for their remarkable shock resistance, S7 tool steel bars are perfect for situations that involve sudden or intense loading. Chuck Metals offers S7 bars in a variety of sizes and finishes to cater to different industrial requirements, adhering to standards like ASTM A681. With a precise chemical makeup and excellent machinability, these bars are essential for high-performance tooling, die-making, and stamping industries where strength and durability under extreme conditions are vital.
Tool and Die Steel S7 Bars are air-hardening tool steels with a composition that includes about 0.45–0.55% carbon, 3.0–3.5% chromium, 1.4–2.2% molybdenum, and 0.2–0.8% vanadium, along with silicon and manganese. This well-balanced composition gives S7 steel a tensile strength of up to 1600 MPa, a hardness rating of 55–60 HRC, and impressive toughness. S7 bars maintain their strength and dimensional stability even when faced with high-impact loads and elevated temperatures. The steel also shows excellent resistance to chipping and cracking, making it ideal for cold work and intermediate hot work applications.
| 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 | – |
Tool and Die Steel S7 Bars are extensively utilized in cold work tooling, including shear blades, chisels, punches, dies, and forming tools, thanks to their shock resistance. They’re also well-suited for plastic molding, hydraulic rams, concrete breakers, and air hammers that undergo sudden or repeated impacts. The ability of S7 steel to retain strength under stress makes it a fantastic option for forging dies and extrusion tools. In industries like aerospace, automotive, and construction, S7 bars are preferred for their machinability and durability, helping to minimize downtime and prolong tool life in high-performance operations.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Chuck Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Singapore, Singapore
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