5195 vs 52100
These two grades are listed as equivalents of each other: their chemistry windows overlap and they serve the same applications. They are not always identical — check the differences below before substituting, especially in certified designs.
5195
Alloy & Engineering Steel
5195 is a high carbon chromium steel closely related to the bearing steel family, used where 1095-class hardness is needed with a little more hardenability from chromium. It appears in spring, blade and wear applications rather than mainstream bar programs.
Standards: AISI 5195 · JIS SUP9 family (near)
52100
Alloy & Engineering Steel
52100 is the world-standard through-hardening bearing steel (ASTM A295): about 1% carbon and 1.5% chromium, hardened to 62–66 HRC for rolling contact fatigue resistance. The JIS name is SUJ2 and the EN name 100Cr6 — all describe the same grade family.
Standards: DIN 1.3505 (100Cr6) · AISI 52100 · JIS SUJ2 · GB GCr15
Chemical composition compared (%)
| Element | 5195 | 52100 |
|---|---|---|
| C | 0.90–1.03 | 0.98–1.10 |
| Si | 0.15–0.35 | 0.15–0.35 |
| Mn | 0.30–0.50 | 0.25–0.45 |
| P | ≤0.035 | ≤0.025 |
| S | ≤0.040 | ≤0.025 |
| Cr | 0.70–0.90 | 1.30–1.60 |
Properties compared
| Property | 5195 | 52100 |
|---|---|---|
| Hardness (hardened) | 58–63 HRC (typ.) | 62–66 HRC |
| Density | 7.85 g/cm³ | 7.85 g/cm³ |
| Delivery condition | — | Spheroidize annealed (≈180–210 HB) |
Sourcing either grade?
Nasteel stocks both families from Shenzhen with EN 10204 3.1 mill certificates by heat number.
Ask for a quotationSee full data sheets: 5195 · 52100. Substitution decisions for certified parts stay with the design authority.