Special Alloy Steels
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Our Stocks are indicated in the tables below. Standard sizes not in our stocks can be requested
EN-19 STEELS
HIGH TENSILE CONSTRUCTION STEEL
Approximate Other Equivalents
Is : 40 Cr4 Mo3 VISL : M – VCL 140 BASL : B – ACS 17
DIN : 42 Cr Mo4 SAE/AISI : 4140
APPLICATION
Parts of Medium cross section where High Tensile & Impact Values are required. Combined with high endurance bending strength. Used in manufacture of Gears/ Shafts/Connecting Rod/High Tensile Bolts, Nuts and Fastners Etc.,
Our Colour Code: ORANGE & YELLOW
LIST OF STANDARD SIZES
- Round: Ø 16mm – Ø 400mm – Black Bass
- Ø 6mm – 32mm – Bright Bass
- RCS: 50 – 200mm
OUR STOCKS
- Round: Ø 8mm – Ø 400mm
- Flat: 20x65mm to 65x200mm
| QUALITY | C | SI | MN | CR | Mo | P & S |
|---|---|---|---|---|---|---|
| EN – 19 | 0.35 | 0.1 | 0.5 | 0.9 | 0.2 | 0.055 |
| 0.45 | 0.35 | 0.8 | 1.2 | 0.35 | MAX |
SPECIFIC HEAT TREATMENT
| QUALITY | EN-19 |
|---|---|
| Forging Temperature | 1050 to 850ºC |
| Annealing Temperature | 680 to 720 (Soft Annealing) |
| Annealed Hardness BHN Max | 217 BHN |
| Hardening Temperature | 830 to 850ºC (Oil), 820 to 840ºC (water) |
| Quenching Media | Oil/Water |
| Obtainable Hardness R.C. | —- |
| Working Hardness HRC. | —- |
| Tempering Temperature | 670 to 530ºC |
| Normalizing Temp | 850 to 880ºC |
EN-24 STEELS
HIGH TENSILE CONSTRUCTION STEEL
Ni-Cr-Mo Steel
APPROXIMATE OTHER EQUIVALENTS
IS: 40 Ni6 Cr Mo3 VISL: M – NMH BASL : B-ACS 21
SAE/ASI: 4340
APPLICATION
Due to High Molybdenum content, these steels are insusceptible to overheating and are free from temper brittleness while permitting higher stress relieving temperatures. Used in construction of aircrafts/heavy vehicles/crank shafts, gear rods, connecting rods etc..
Our Colour Code: GREY
LIST OF STANDARD SIZES
- Round: Ø 6mm – Ø 600mm
- Flat: 6×20 – 200x500mm
- Square: 6mm to 300mm
OUR STOCKS
- Round: Ø 16mm – Ø 400mm
- Flat: 7x50mm to 200x300mm
- Square: 25mm to 200mm
| QUALITY | C | SI | Mn | Cr | Ni | Mo | P & S |
|---|---|---|---|---|---|---|---|
| EN-24 | 0.35 | 0.1 | 0.4 | 0.9 | 1.25 | 0.1 | 0.055 |
| 0.45 | 0.35 | 0.7 | 1.3 | 1.75 | 0.2 | MAX |
SPECIFIC HEAT TREATMENT
| QUALITY | EN-24 |
|---|---|
| Forging Temperature | 1050 to 850ºC |
| Annealing Temperature | 680 to 700ºC (Soft Annealing) |
| Annealed Hardness BHN Max | 220 BHN |
| Hardening Temperature | 830 to 850ºC (Oil) |
| Quenching Media | Oil |
| Obtainable Hardness R.C. | —- |
| Working Hardness HRC. | —- |
| Tempering Temperature | 670 to 530ºC |
| Normalizing Temp | 850 to 880ºC |
EN-31 &SAE 52100
BALL BEARING STEEL
1% CARBON CHROMIUN STEEL
APPROXIMATE OTHER EQUIVALENTS
IS : 104Cr2/103Cr2Mn70 VISL : M – K150 BASL : B – B2
T105Cr1/T105Cr1Mn6
DIN :100Cr6 AISI : 52100
APPLICATION
Used in manufacture of Ball & Roller Bearing, Connecting Rods, big end Bushes, Lathe Centers & Collets. EN – 31 BB SAE 52100 are also be used as back up Rolls in cold Rolling and Stainless Steels Sheets Rolling Mills. Can also be used for small hardened steel Rolling Mill shear Blades, Instrument Pivots & Spindles, Pillars & Bushes for Die Sets.
NOTE: Values may vary between EN-31(Tool Steel) to EN-31(BB) SAE52100 Quality. You will need to verify this with your metallurgist or customer.
Our Colour Code: GREEN & YELLOW
LIST OF STANDARD SIZES
- Round: Ø 16mm – Ø 400mm
- Flat: 6×25 – 200×500
- Square: 20 – 200mm
- Silver Steel(52100): Gr Bass – Q1 to Q25 mm
OUR STOCKS
- Round: Ø 14mm – Ø 300mm
- Flat: 6x25mm to 150x400mm
- Square: 16mm to 200mm
- Silver Steel(52100): Gr 2x16mm
| QUALITY | C | SI | MN | CR | P & S |
|---|---|---|---|---|---|
| EN – 31 & SAE 52100 | 0.95 | 0.15 | 0.25 | 0.4 | 0.025 |
| EN – 31 & SAE 52100 | 1.15 | 0.35 | 0.45 | 1.65 | MAX |
SPECIFIC HEAT TREATMENT
| QUALITY | EN – 31 | SAE 52100 |
|---|---|---|
| Forging Temperature | 1050 to 850ºC | 1050 to 850ºC |
| Annealing Temperature | 750 to 800ºC | 750 to 800ºC |
| Annealed Hardness BHN Max | 207 BHN | 207 BHN |
| Hardening Temperature | 800 to 820ºC (Water), 830 to 850ºC (Oil) | 800 to 820ºC, 830 to 850ºC |
| Quenching Media | Water /Oil | Water /Oil |
| Obtainable Hardness R.C. | 63-67 & 63-67 HRC | 63-67 & 63-67 HRC |
| Working Hardness HRC. | 61-65 & 61-63 HRC | 61-65 & 61-63 HRC |
| Tempering Temperature | 150 to 250ºC | 150 to 250ºC |
| Normalising Temperature | —- | —- |
