Description
EN31 Grade Introduction
As EN31 Round Bar manufacturers, we prioritize using only prime quality billets and blooms to produce high-grade round bars. Our EN31 Round Bars are renowned for their exceptional quality and are widely used in machinery and OEM auto components. Manufactured to meet stringent industry standards, these bars come with test certificates and can be supplied in bulk or retail quantities to suit customer needs. EN31 alloy steel round bars are utilized across various industries for their reliability and performance.
EN31 is a high-strength steel alloy that is hardened and tempered to enhance its mechanical properties. With a composition of nickel, chromium, and molybdenum, EN31 exhibits high tensile strength, excellent ductility, and superior wear resistance. It maintains good impact properties at low temperatures and performs well in elevated temperature applications. EN31 round bars are known for their high internal and external strength, making them highly wear-resistant and ideal for demanding applications.
EN31 Grade Application
EN31 steel is commonly used in a variety of applications, including:
- Taps
- Gauges
- Swaging dies
- Ejector pins
- Ball and roller bearings
This grade is suitable for wear-resistant machine parts and press tools that do not require more complex alloys.
EN31 Equivalent Grades
- British BS 970:1991: 535A99
- British BS 970:1955: EN31
- German DIN: 100CR6
- French AFNOR: 100C6
- Swedish SS: 2258
- American SAE: 52100
Additional Grades
MS, EN1A, EN3B, EN8, EN8D, EN9, EN24, EN31, EN32B, EN36C, EN41B, EN43B, EN47, EN353, IS2062, 42CrMo4, HCHCR, D2, D3, H-11, H-13, CW-1, OHNS, M2, M35, M42, DIN 1.2714, P20, P20+S, P20+Ni, SCM420, ASTM A36, ASTM A105, SAE1018, SAE1010, SAE4140, SAE8620, 16MNCR5, 20MNCR5, C20, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75, SAE52100, S40C, S355J2G3.
Our Supply Range
- Price List: EN31
EN31 Chemical Composition
| Element | C (%) | Si (%) | Mn (%) | P (%) | S (%) | 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
- Tensile Strength: 750 N/mm²
- Yield Stress: 450 N/mm²
- Reduction of Area: 45%
- Elongation: 30%
- Modulus of Elasticity: 215,000 N/mm²
- Density: 7.8 kg/m³
- Hardness: 63 HRC
EN31 Hardness
- Rockwell Hardness: 63 HRC
EN31 Heat Treatment
Heat treatment parameters, including heating rates, cooling, and soaking times, will vary based on the shape and size of the component. For precise guidelines, consult your heat treatment provider.
Hardening: Heat slowly to 800-820°C, soak thoroughly, and then quench in oil.
Tempering: Temper based on application requirements, typically between 150°C and 300°C. Soak for at least one hour per 25 mm of thickness and cool slowly in air.
| Temperature [°C] | Hardness [HRc] |
|---|---|
| 150 | 63-62 |
| 200 | 62-61 |
| 250 | 60-59 |
| 300 | 57-56 |
EN31 Physical Properties
- Thermal Conductivity: 46.6 W/m-K
- Density: 7.81 g/cm³
- Melting Point: 1540°C
EN31 Thermal Properties
- Thermal Expansion Coefficient (@ 23-280°C/73.4-536°F): 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 and begin forging at 1000-1050°C. Maintain temperature for thorough soaking. Avoid forging below 850°C. After forging, cool slowly, preferably in a furnace.
EN31 Stress Relieving
For parts that undergo heavy machining, stress-relieving is beneficial before hardening. Heat EN31 to 700°C, soak well, and cool in air.
EN31 Normalizing
Heat EN31 to 816°C and quench in oil. Prior to normalizing, heat to 872°C and cool slowly to reduce machining stress.
EN31 Annealing
Typically supplied in an annealed and machinable condition. Re-annealing is needed only if the steel has been forged or hardened. To anneal, heat to 800-810°C, soak well, and cool in the furnace.
EN31 Machinability
EN31 steel is used in the automobile industry and is challenging to machine precisely. Investigations focus on wire electrical discharge machining (WEDM) to understand how parameters like pulse on-time, servo voltage, wire feed, and wire tension affect surface characteristics. Lower pulse on-time and servo voltage generally reduce kerf width and edge roughness, though cutting rate varies with pulse on-time and servo voltage. Wire tension and feed impact edge roughness and kerf width differently.
EN31 Welding
EN31 alloy steel welding performance meets the relevant standards and can be customized based on customer requirements. For detailed welding guidance, consult your welding consumables supplier.
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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