Description
EN31 Grade Introduction:
We manufacture EN31 Round Bars using high-quality billets and blooms to ensure superior quality for our customers. EN31 round bars are widely used in machinery and OEM auto components, adhering to stringent industry quality parameters. These round bars are provided with test certificates and can be supplied in bulk or retail quantities based on customer requirements. EN31 alloy steel round bars are used across various industries for their high strength, wear resistance, and ductility.
EN31 is a high-strength steel alloy that is hardened and tempered before being supplied. It contains nickel, chromium, and molybdenum, making it a high-tensile steel with excellent wear resistance and ductility. EN31 also possesses good impact properties at low temperatures and can be used for elevated temperature applications. Its high internal and external strength makes it a popular choice for demanding industrial applications.
EN31 Grade Application:
EN31 steel is used in a wide range of applications that require high strength and wear resistance, including:
- Taps and gauges
- Swaging dies
- Ejector pins
- Ball and roller bearings
- Wear-resistant machine parts
- Press tools
EN31 Equivalent Grades:
| Country | Standard | Equivalent Grades |
|---|---|---|
| British | BS 970:1991 / BS 970:1955 | 535A99 / EN31 |
| German | DIN | 100CR6 |
| French | AFNOR | 100C6 |
| Swedish | SS | 2258 |
| American | SAE | 52100 |
Additional Grades Available:
We also offer a variety of other grades, including EN1A, EN8, EN9, EN24, EN36C, H13, D2, and more, covering a wide range of carbon and alloy steels.
EN31 Chemical Composition:
| Element | C | Si | Mn | P (Max) | S (Max) | Cr |
|---|---|---|---|---|---|---|
| Content | 0.95-1.10 | 0.10-0.35 | 0.40-0.70 | 0.040 Max | 0.050 Max | 1.20-1.60 |
EN31 Mechanical Properties:
| Property | Metric | Imperial |
|---|---|---|
| Tensile Strength | 750 N/mm² | 108,750 psi |
| Yield Stress | 450 N/mm² | 65,250 psi |
| Reduction of Area | 45% | 45% |
| Elongation | 30% | 30% |
| Modulus of Elasticity | 215,000 N/mm² | 31,183,000 psi |
| Hardness | 63 HRC | 63 HRC |
EN31 Hardness:
EN31 exhibits a high hardness of up to 63 HRC, making it highly wear-resistant and suitable for heavy-duty applications.
EN31 Heat Treatment:
Heat treatment varies based on the shape and size of the EN31 components. Factors like furnace type, quenching medium, and workpiece transfer are critical for optimizing the process.
- Hardening: Heat to 800-820°C, soak thoroughly, then quench in oil.
- Tempering: Typically performed between 150-300°C, soaking for 1 hour per 25 mm thickness.
EN31 Tempering Properties:
| Temperature [°C] | 150 | 200 | 250 | 300 |
|---|---|---|---|---|
| Hardness (HRC) | 63-62 | 62-61 | 60-59 | 57-56 |
EN31 Physical Properties:
| Property | Value |
|---|---|
| Thermal Conductivity | 46.6 W/m·K |
| Density | 7.81 g/cm³ |
| Melting Point | 1540°C |
EN31 Thermal Properties:
| Property | Metric | Imperial |
|---|---|---|
| Thermal Expansion Coefficient | 11.9 µm/m°C | 6.61 µin/in°F |
| Thermal Conductivity | 46.6 W/m·K | 323 BTU in/hr.ft².°F |
EN31 Forging Properties:
Heat slowly to 1000-1050°C for forging. Ensure adequate soaking at forging temperatures, and do not forge below 850°C. Post-forging, allow EN31 steel to cool slowly, ideally in a furnace.
EN31 Stress Relieving:
Stress-relieving can be beneficial before hardening, particularly for heavily machined components. Heat to 700°C, soak thoroughly, and cool in air.
EN31 Normalizing:
Normalize by heating EN31 to 872°C, followed by slow cooling. This process helps relieve machining stresses and prepares the steel for further treatment.
EN31 Annealing:
EN31 is usually supplied in annealed form. If re-annealing is required, heat slowly to 800-810°C, soak thoroughly, and cool slowly in the furnace.
EN31 Density:
The density of EN31 steel is 7.81 g/cm³, making it a strong and durable material for industrial applications.
EN31 Machinability:
EN31 steel’s machinability is well-suited for the automobile industry. It responds well to wire electrical discharge machining (WEDM). Parameters such as pulse on-time, servo voltage, wire feed, and wire tension impact the quality of the machined surface, with low pulse on-time reducing edge roughness.
EN31 Welding:
EN31 Alloy Steel can be welded, but the process must account for its high carbon content to avoid cracking. Preheating and post-weld treatments like annealing are recommended to achieve the desired strength and prevent material failure.
Supply Cities:
Mumbai Ahmedabad, Amaravathi, Ambattur, Bangalore, Belgaum, Chennai, Chittoor, Coimbatore, Dindigul, Mysore, Nellore, Hyderabad, Kochi, Mangalore, Tirupur, Tuticorin, Madurai, Andhra Pradesh, Karnataka, Puducherry, Kerala, Tamil Nadu, Telangana, Visakhapatnam, Kochi, Kerala, Hubli-Dharwad, Karnataka.
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