X70CrMo15
1.4109Ultra-high-carbon martensitic stainless steel for maximum hardness and edge retention. The highest standard carbon content (0.60-0.75%) among EN 10088 martensitic grades with Mo addition. Achieves 58-60 HRC. Superior wear resistance and edge sharpness. Used for premium razor blades, surgical scalpels, industrial cutting tools, and high-performance knife blades where maximum edge retention is critical.
Chemical composition comparison (wt%)
Side-by-side: X70CrMo15 (EN) (EN 10088-2) vs ASTM
| Element | X70CrMo15 (EN) | ASTM | Overlap |
|---|---|---|---|
| C | 0.6–0.75% | — | — |
| Si | ≤ 1% | — | — |
| Mn | ≤ 1% | — | — |
| P | ≤ 0.04% | — | — |
| S | ≤ 0.015% | — | — |
| Cr | 14–16% | — | — |
| Mo | 0.4–0.8% | — | — |
Mechanical properties
QT
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ≥ 1000 | MPa |
| Yield Strength | ≥ 800 | MPa |
| Elongation | ≥ 6 | % |
| Hardness HRC | 58–60 | HRC |
| Density | ≥ 7.7 | g/cm3 |
Heat treatment
| Process | Temperature | Medium | Holding Time | Notes |
|---|---|---|---|---|
| hardening | 1050–1100 °C | oil | — | Oil quench; cryogenic treatment recommended |
| tempering | 150–250 °C | air | — | Low temper for maximum hardness |
Related materials
304 Stainless Steel
1.4301The most widely used austenitic stainless steel. Excellent corrosion resistance, good formability and weldability. Standard choice for food processing, chemical, and architectural applications.
316L
1.4404Low-carbon austenitic stainless steel with molybdenum addition. Superior corrosion resistance to 304, especially against chlorides and pitting. Standard choice for chemical processing, marine, medical implants, and pharmaceutical equipment.
430 Stainless Steel
1.4016Ferritic chromium stainless steel with good corrosion resistance and formability. Lower cost than austenitic grades. Used for automotive trim, kitchen sinks, architectural panels, and appliance components.
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