CA6NM / X3CrNiMo13-4
1.4313Soft martensitic (supermartensitic) stainless steel with good corrosion resistance and high toughness. Low carbon prevents embrittlement. The standard material for hydraulic turbine runners, pump impellers, compressor components, and offshore valves.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | ASTM | USA | CA6NM / UNS J91540 | J91540 | REF |
| 🇪🇺 | EN | Europe | X3CrNiMo13-4 | 1.4313 | 100% |
| 🇺🇸 | AISI | USA | AISI 415 | S41500 | 95% |
Sources: ASTM A743, EN 10088-3, ASTM A240
Chemical composition comparison (wt%)
Side-by-side: CA6NM / X3CrNiMo13-4 (EN) (EN 10088-3) vs AISI 415 (AISI)
| Element | CA6NM / X3CrNiMo13-4 (EN) | AISI 415 (AISI) | Overlap |
|---|---|---|---|
| C | 0–0.05% | — | — |
| Si | 0–0.7% | — | — |
| Mn | 0–1.5% | — | — |
| P | 0–0.04% | — | — |
| S | 0–0.015% | — | — |
| Cr | 12–14% | — | — |
| Mo | 0.3–0.7% | — | — |
| Ni | 3.5–4.5% | — | — |
Mechanical properties
QT
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 760–960 | MPa |
| Yield Strength | ≥ 550 | MPa |
| Elongation | ≥ 15 | % |
| Elastic Modulus | ≥ 215 | GPa |
| Density | ≥ 7.7 | g/cm3 |
Heat treatment
| Process | Temperature | Medium | Holding Time | Notes |
|---|---|---|---|---|
| quenching | 980–1020 °C | air | 30-60 min | Air hardening typical |
| tempering | 580–620 °C | air | min 2 hours | Double temper recommended. Avoid 350-550°C. |
Compatibility verdict
CA6NM / X3CrNiMo13-4 and AISI 415: 95% composition match
Close equivalents but NOT identical.
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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