X30Cr13
1.4028Martensitic chromium stainless steel with moderate carbon content (0.26-0.35%) and 12-14% Cr. Part of the AISI 420 family. Can be hardened to approximately 50-52 HRC. Good balance of hardness, toughness, and corrosion resistance. Used for cutlery, kitchen knives, scissors, springs, surgical instruments, and pump shafts. Better toughness than higher-carbon variants X39Cr13 and X46Cr13.
Chemical composition comparison (wt%)
Side-by-side: X30Cr13 (EN) (EN 10088-2) vs ASTM
| Element | X30Cr13 (EN) | ASTM | Overlap |
|---|---|---|---|
| C | 0.26–0.35% | — | — |
| Si | ≤ 1% | — | — |
| Mn | ≤ 1% | — | — |
| P | ≤ 0.04% | — | — |
| S | ≤ 0.015% | — | — |
| Cr | 12–14% | — | — |
Mechanical properties
QT
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ≥ 800 | MPa |
| Yield Strength | ≥ 600 | MPa |
| Elongation | ≥ 12 | % |
| Hardness HRC | 48–52 | HRC |
| Density | ≥ 7.7 | g/cm3 |
Heat treatment
| Process | Temperature | Medium | Holding Time | Notes |
|---|---|---|---|---|
| hardening | 980–1030 °C | oil | — | Air or oil quench |
| tempering | 150–350 °C | air | — | Temper to desired hardness |
| annealing | 750–800 °C | furnace | — | Soft annealing, slow cool |
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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