Mechanical Properties Of Martensitic Stainless Steel Bars
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Martensitic stainless steel is a type of stainless steel that can be strengthened by quenching + tempering heat treatment. Its crystal structure is mainly martensite phase, with high strength and hardness. According to the composition, it can be divided into:
Cr13 type (such as 410, 420, 420J2): contains 12-14% Cr, carbon content 0.1-0.4%, balance strength and corrosion resistance.
High carbon high chromium type (such as 440A/B/C): contains 16-18% Cr, carbon content 0.7-1.2%, known for its ultra-high hardness.
Mechanical properties of martensitic stainless steel bars
| Type | Representative Grades | Yield Strength (MPa) | Hardness (HRC) | Corrosion Resistance | Typical Applications |
|---|---|---|---|---|---|
| Martensitic | 410, 440C | 500-1500 | 20-60 | Moderate | Knives, mechanical components |
| Austenitic | 304, 316L | 205-300 | 15-25 | Excellent | Food equipment, chemical pipelines |
| Ferritic | 430, 409 | 200-400 | 15-25 | Good | Appliance housings, automotive exhaust |
Key notes:
The numerical ranges reflect typical mechanical property variations across different heat treatment conditions
Austenitic grades are non-magnetic while martensitic/ferritic grades are magnetic
Corrosion resistance ranking: Austenitic > Ferritic > Martensitic
316L contains molybdenum for improved chloride resistance compared to 304
