SAE 52100
SAE 52100 Grade Introduction:
SAE 52100 Grade introduction:
SAE 52100 bearing steel is a high-quality Alloy Bearing steel, It belongs to high carbon, chromium-containing low alloy steel. SAE 52100 Oil Quenched & Tempered Hardness is 28-34 HRC. SAE 52100 steel Annealing delivery hardness less than 250HB.
SAE 52100 Alloy bearing steel properties is a chromium, manganese alloy steel specification. SAE 52100 is equivalent to DIN 100Cr6, GB GCr15 steel. Most applications can replace each other.
SAE 52100 Grade Application:
- Bearings in rotating machinery
- Valve bodies
- Pumps and fittings
- High load wheels
- Bolts and double-headed bolts
- Gears
- Internal combustion engines
- Electric locomotives
- Machine tools
- Railway vehicles
SAE 52100 Equivalent Grades:
| Country |
Standard |
Grade |
| USA |
ASTM A295 |
52100 |
| German |
DIN 17230 |
100Cr6/1.3505 |
| Japan |
JIS G4805 |
SUJ2 |
| British |
BS 970 |
535A99/EN31 |
SAE 52100 Chemical Composition:
| Standard |
Grade |
C |
Mn |
P |
S |
Si |
Ni |
Cr |
Cu |
Mo |
| ASTM A295 |
52100 |
0.93-1.05 |
0.25-0.45 |
0.025 |
0.015 |
0.15-0.35 |
0.25 |
1.35-1.60 |
0.30 |
0.10 |
| DIN 17230 |
100Cr6/1.3505 |
0.90-1.05 |
0.25-0.45 |
0.030 |
0.025 |
0.15-0.35 |
0.30 |
1.35-1.65 |
0.30 |
– |
| JIS G4805 |
SUJ2 |
0.95-1.10 |
0.50 |
0.025 |
0.025 |
0.15-0.35 |
– |
1.30-1.60 |
– |
– |
| BS 970 |
535A99/EN31 |
0.95-1.10 |
0.40-0.70 |
– |
– |
0.10-0.35 |
– |
1.20-1.60 |
– |
– |
Mechanical Properties:
| Quantity |
Value |
Unit |
| Young’s modulus |
200000 – 20000 |
MPa |
| Tensile strength |
50 – 880 |
MPa |
| Elongation |
8 – 25 |
% |
| Fatigue |
275 – 275 |
MPa |
| Yield strength |
350 – 350 |
MPa |
Physical Properties:
| Property |
Metric |
Imperial |
| Density |
7.81 g/cm³ |
0.282 lb/in³ |
| Melting point |
1424°C |
2595°F |
Thermal Properties:
| Property |
Metric |
Imperial |
| Thermal expansion coefficient (@ 23-280°C/73.4-536°F, annealed) |
11.9 µm/m°C |
6.61 µin/in°F |
| Thermal conductivity (typical steel) |
46.6 W/mK |
323 BTU in/hr.ft².°F |
Forging Properties:
AISI 52100 alloy steel is forged at 927 to 1205°C, and should not be forged below 925ºC. A post-forge equalization treatment is recommended at 745ºC for 4-6 hours followed by air cooling for SAE/AISI 52100 steel.
Stress Relieving:
Heat it up to 600-700℃, stay the temperature, furnace cooling. The need for the hardness of mold steel is 187-229HBS. The characters remove the work hardening and residual stress.