Steel SAE 52100
AISI SAE 52100 steel is a kind of anti-friction bearing steel with high carbon content.
52100 Bearing Steel Data Sheet
The following table and lists show the data sheet and specifications of 52100, including chemical composition, mechanical properties and heat treatment, etc.
Chemical Composition of AISI 52100 Steel
The following table presents the chemical composition of AISI SAE 52100 steel.
| Chemical composition % | |||||||||||
| Steel Grade (UNS) | W | Yes | Mn | P ≤ | S ≤ | Cr | Mo ≤ | Ni ≤ | Cu ≤ | Oh ≤ | Al ≤ |
| 52100 (G52986) | 0.93-1.05 | 0.15-0.35 | 0.25-0.45 | 0.025 | 0.015 | 1.35-1.60 | 0.10 | 0.25 | 0:30 | 0.0015 | 0.05 |
Physical properties
| AISI 52100 linear thermal expansion coefficient | ||
| Value (10-6/K) | Temperature (°C) | Treatment or condition |
| 11.9 | 0-100 | Annealed |
| 12.6 | Hardened | |
Mechanical Properties of Steel 52100
ASTM 52100 Material Hardness
- Hot rolled and annealed coils: ≤92 HRB
- Hot-rolled annealed bars and tubes: ≤207 HBW
- Annealed and cold drawn coils: ≤92 HRB
- Annealed and cold drawn coils, bars and tubes: ≤248 HBW
- Annealed and cold stirred tubes: ≤331 HBW
Flame hardening AISI 52100
- 55-60 HRC (Quenchant: Air or oil)
- 62-64 HRC (Quenchant: Water)
Typical heat treatment
girdling
Annealing temperature is 730-790 ℃ (1350-1450 ℉), furnace cooling.
Austenitization
The austenitizing temperature is 855 ℃ (1575 ℉)
Hammertemperage
Martempering Temperature: 190℃ (375℉), Agent: Oil.
Martensitic
The heat treatment cycle for martensitic hardening of 52100 bearing steel is as follows:
- The austenitizing temperature is 815-855°C for 15-40 minutes, each additional inch of thickness increases by 30 minutes.
- Quenching temperature ≤ 150 °C stirred oil (martensitic hardening); ≥ 230 °C molten salt (bainite hardening).
- Tempering temperature 150-230 °C for 2-4 hours (Rockwell hardness 58-64 HRC)
Rockwell hardness when quenched after heat treatment is typically 64-67 HRC.
Forms
Bearing Steel 52100 mainly used for bearings, bearing races, sealing rings, balls, rollers, guide bars, sleeves, knives and blades, etc.
Equivalent Notes
AISI SAE 52100 bearing steel equivalent to ISO, European EN (Germany DIN, British BS, French NF), Japanese JIS and Chinese GB. (For reference)
| 52100 equivalent grades of steel | |||||||||||||
| USA | ISO | European | Germany | Japan | China | ||||||||
| Standard | Note | Standard | Grade (steel number) | Standard | Grade (steel number) | Standard | Grade (steel number) | Standard | Note | Standard | Note | ||
| AISI-SAE; ASTM A295/A295M |
52100 | ISO 683-17 | 100Gr6 (1.3505) | EN ISO 683-17 | 100Gr6 (1.3505) | DIN EN ISO 683-17 | 100Gr6 (1.3505) | JIS G4805 | SUJ2 | GB/T 18254 | GCr15 | ||
