X2CrNiN18-7
1.4318Nitrogen-alloyed work-hardening austenitic — AISI 301LN. Lower Ni (6-8%) than 304 makes it metastable: cold work transforms austenite to martensite → UTS up to 1400 MPa in full-hard condition. N addition compensates low C for corrosion and strength. Used for rail car bodies, springs, structural parts requiring high strength-to-weight ratio, and architectural cladding.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AISI | USA | AISI 301LN / UNS S30153 | S30153 | REF |
| 🇪🇺 | EN | Europe | X2CrNiN18-7 / 1.4318 | 1.4318 | 100% |
Sources: ASTM A666, EN 10088-2
Chemical composition comparison (wt%)
Side-by-side: X2CrNiN18-7 (EN) (EN 10088-2) vs X2CrNiN18-7 / 1.4318 (EN) (EN 10088-2)
| Element | X2CrNiN18-7 (EN) | X2CrNiN18-7 / 1.4318 (EN) | Overlap |
|---|---|---|---|
| C | 0–0.03% | 0–0.03% | OK |
| Si | 0–1% | 0–1% | OK |
| Mn | 0–2% | 0–2% | OK |
| Cr | 16.5–18.5% | 16.5–18.5% | OK |
| Ni | 6–8% | 6–8% | OK |
| N | 0.07–0.2% | 0.07–0.2% | OK |
Mechanical properties
Solution annealed
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 550–750 | MPa |
| Yield Strength | ≥ 250 | MPa |
| Elongation | ≥ 40 | % |
| Density | ≥ 7.9 | g/cm3 |
C1000
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 950–1150 | MPa |
Compatibility verdict
X2CrNiN18-7 and X2CrNiN18-7 / 1.4318: 100% 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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