- EN31 is a high carbon Alloy steel which achieves a high degree of hardness with compressive strength and abrasion resistance.
PROPERTIES
|
METRIC
|
IMPERIAL
|
|---|---|---|
| Density | 7.85 g/cc | 0.284 lb/in3 |
Forging
- Forge at 1000°/1050°C. Heat slowly, allowing sufficient time at the forging temperature for the steel to be thoroughly soaked through. Re-heat as often as necessary to keep the temperature above 850°C. After forging cool very slowly, preferably in a furnace.
Annealing
- Heat uniformly to 800°C, equalize, then furnace cool. (Hardness about 229 Brinell).
Stress Relieving
- If machining operations have been heavy or if the tool has an unbalanced section, remove stresses before hardening by heating up to 700°C, equalize, then cool slowly.
Tempering
- Heat uniformly and thoroughly at the selected tempering temperatures and hold for at least one hour per inch of total thickness.
TEMPERING °C
|
100
|
150
|
200
|
250
|
300
|
350
|
|---|---|---|---|---|---|---|
| HRc | 64/63 | 63/62 | 62/61 | 60/59 | 57/56 | 54/53 |
Physical Properties
NAME OF MATERIAL
|
COMPOSITION IN %OF WEIGHT
|
THERMAL CONDUCTIVITY W/M-K
|
DENSITY KGM3
|
MELTING POINT °C
| ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| C | Mn | Si | Cr | S | P | Mg | ||||
| EN-31 IS-103 Crl | 1.5 | 0.52 | 0.22 | 1.3 | 0.05 | 0.05 | – | 46.6 | 7810 | 1540 |
Mechanical Properties
ELEMENT
|
OBJECTIVE
|
|---|---|
| Tensile Strength | 750 N/mm² |
| Yield Stress | 450 N/mm² |
| Reduction of Area | 0.45 |
| Elongation | 0.3 |
| Modulus of elasticity | 215 000 N/mm² |
| Density | 7.8 Kg/m3 |
| Hardness | 63 HRC |
Heat Treatment of EN-31
ELEMENT
|
OBJECTIVE
|
|---|---|
| Hardening Temperature | 802˚- 860˚ C |
| Quenching Medium | Oil |
| Tempering Temperature | 180˚- 225˚ C |
| Brinell-Rockwell Hardness | 59 – 65 |
Hardening
- Heat uniformly to 800/820°C until heated through. Allow 30 minutes per inch of ruling section and quench immediately in oil.
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