Spring Steel
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Spring Steel EN 42J
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| Material Grade | Standard |
| Technique | Standard |
| Hardness | Standard |
| Material | Standard |
| Microstructure | Standard |
| Reduction Ratio | Standard |
Chemical composition-
Mechanical Properties
Applications
The chemical composition of M42 molybdenum high speed tool steel is outlined in the following table.
| Element | Min % | Max % |
|---|---|---|
| Carbon, C | 0.75 | 0.90 |
| Manganese, Mn | 0.60 | 0.90 |
| Silicon, Si | -.-- | 0.35 |
| Nickel, Ni | -.-- | -.-- |
| Molybdenum, Mo | -.-- | -.-- |
| Chromium,Cr | -.-- | -.-- |
| Sulfur, S | -.-- | 0.05 |
| Phosphorous, P | -.-- | 0.05 |
| Elastic Modulus (GPa) | 190-210 |
|---|---|
| Tensile Strength (Mpa) | 615.4 |
| Yield Strength (Mpa) | 375.8 |
| Elongation (%) | 24.7 |
| Reduction in Area (%) | 45 |
| Hardness (HB) | 174 |
| Impact Strength (J) | 6.1 |
- EN42J is suitable for a wide variety of spring applications including flat springs, clutches, knives, doctor blades, saw blades, agricultural tools, wood cutting saws, shims, knives, blades, shims, washers, masonry tools.
- When heat treating EN42 temperatures, including rate of heating, cooling and soaking times etc. will vary due to factors such as the shape and size of each component. Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities. Please consult your heat treatment provider for full guidance on heat treatment of spring steels.
- We recommend you contact your welding consumables supplier who should provide you full assistance and information on welding EN42J steel.
Spring Steel EN 47
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Mechanical Properties
Physical Properties
Forging
Welding
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| Material Grade | Standard |
| Hardness | Standard |
| Material | Standard |
| Microstructure | Standard |
| Reduction Ratio | Standard |
| Spark And Spectral | Standard |
- EN47 is suitable for oil hardening and tempering. When used in the oil hardened and tempered condition EN47 spring steel combines spring characteristics with good wear and abrasion resistance. When hardened EN47 offers excellent toughness and shock resistance which make it a suitable alloy spring steel for parts exposed to stress, shock and vibration.
- EN47 is used widely in the motor vehicle industry and many general engineering applications. Suitable for applications that require high tensile strength and toughness. Typical applications include crankshafts, steering knuckles, gears, spindles and pumps.
| Element | Min % | Max % |
|---|---|---|
| Carbon, C | 0.45 | 0.55 |
| Manganese, Mn | 0.50 | 0.80 |
| Silicon, Si | -.-- | 0.50 |
| Nickel, Ni | -.-- | -.-- |
| Molybdenum, Mo | -.-- | -.-- |
| Chromium,Cr | 0.80 | 1.20 |
| Sulfur, S | -.-- | 0.05 |
| Phosphorous, P | -.-- | 0.05 |
| Vanadium | 0.15 | -.-- |
| Quantity | Value | Unit |
|---|---|---|
| young's Modulus | 200000-200000 | MPa |
| Tensile strength | 650-880 | MPa |
| Elongation | 41876 | % |
| Fatigue | 275-275 | MPa |
| Yield strength | 350-550 | MPa |
| Density | 7700 | kg/m3 |
| Quantity | Value | Unit |
|---|---|---|
| Thermal expansion | 41922 | e-6/k |
| Thermal conductivity | 25-25 | W/m.k |
| Specofic heat | 460-460 | J/kg.k |
| Melting temperature | 1450-1510 | °C |
| Density | 7700-7700 | kg/m3 |
| Resistivity | 0.55-0.55 | ohm.mm2/m |
- Preheat the steel carefully, then raise temperature to 1050°C for forging. Do not forge below 840°C. After forging EN47 spring steel cool slowly, preferably in a furnace.
- Heat slowly to 820-840°C, soak well. Cool slowly in the furnace.
- Heat slowly to 650-700°C and thoroughly soak. Continue to heat the steel to the final hardening temperature of 830-860°C and allow the component to be heated through. Quench in oil.
- Temper the EN47 spring steel component immediately after quenching whilst tools are still hand warm. Re-heat to the tempering temperature then soak for one hour per 25 millimetre of total thickness (2 hours minimum) Cool in air. For most applications tempering of this grade will be between 400-600°C.
- Heat treatment temperatures, including rate of heating, cooling and soaking times etc. will vary due to factors such as the shape and size of each component. Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities. Please consult your heat treatment provider for full guidance on heat treatment of EN47.
| Annealing | Quenching | Tempering | Normalizing | Q&T |
|---|---|---|---|---|
- We recommend you contact your welding consumables supplier who should provide you full assistance and information on welding EN47 chrome vanadium spring steel.
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E Mohammad Shahid (Managing Director)
Popular Steel Corporation
No. 72- A, Mugappair Road, Mannurpet
Padi, Chennai - 600050, Tamil Nadu, India
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