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1. Martensitic 410 Overview
Martensitic 410 stainless steel (UNS S41000) is the most widely used general-purpose martensitic chromium stainless steel without nickel addition. Featuring a straightforward chemical composition with 11.5%–13.5% chromium and controlled carbon content up to 0.15%, this alloy delivers balanced mechanical strength, excellent heat-treatable hardness, moderate atmospheric corrosion resistance, and outstanding cost performance. Manufactured in strict accordance with ASTM A240, AISI, and EN industry standards, 410 stainless steel is magnetic, easy to machine, and suitable for mass industrial production.
Unlike austenitic stainless steels such as 304, martensitic 410 gains customizable hardness and tensile strength through precise quenching and tempering heat treatment. After thermal processing, its martensitic microstructure significantly improves wear resistance and structural stability, making it an ideal material for high-hardness mechanical components, general engineering parts, and daily hardware products.
2.Chemical Composition
The compositional ranges of grade 410 stainless steels are displayed below.
| Grade | C | Mn | Si | P | S | Cr | Ni | |
|---|---|---|---|---|---|---|---|---|
| 410 | min. max. | – 0.15 | – 1 | – 1 | – 0.04 | – 0.03 | 11.5 13.5 | 0.75 |
3.Mechanical Properties
The typical mechanical properties of grade 410 stainless steels are listed in the following table:
| Tempering Temperature (°C) | Tensile Strength (MPa) | Yield Strength 0.2% Proof (MPa) | Elongation (% in 50 mm) | Hardness Brinell (HB) | Impact Charpy V (J) |
|---|---|---|---|---|---|
| Annealed * | 480 min | 275 min | 16 min | – | – |
| 204 | 1475 | 1005 | 11 | 400 | 30 |
| 316 | 1470 | 961 | 18 | 400 | 36 |
| 427 | 1340 | 920 | 18.5 | 405 | # |
| 538 | 985 | 730 | 16 | 321 | # |
| 593 | 870 | 675 | 20 | 255 | 39 |
| 650 | 300 | 270 | 29.5 | 225 | 80 |
4. Core Material Advantages
- Heat-Treatable Hardness: In accordance with ASTM A240 standard, the maximum annealed hardness is 201 HB, while tempered hardness can be upgraded to 38–45 HRC, meeting diverse hardness requirements for mechanical parts.
- Excellent Machinability: Soft annealed state ensures smooth cutting, punching, fine blanking, and surface polishing, reducing processing costs for manufacturers.
- Moderate Corrosion Resistance: Resists rusting in dry atmospheric environments, fresh water, and weak corrosive media; its oxidation and corrosion resistance is superior to carbon steel, but slightly inferior to high-chromium ferritic stainless steel (e.g., 430).
- High Mechanical Stability: High tensile strength and yield strength after heat treatment, with good wear resistance and fatigue resistance for long-term service.
- Cost-Effective Formula: Low-alloy design without expensive nickel elements, realizing low procurement cost while maintaining basic stainless steel performance.
- Good Formability: Available in sheet, plate, strip, flat bar, and customized profiles to adapt to diversified industrial processing scenarios.
5. Typical Industrial Applications
Due to its balanced performance and economic benefits, martensitic 410 stainless steel covers extensive application fields across global industries:
- Hardware & Cutlery: Kitchen knives, scissors, daily cutlery, and polished hardware accessories.
- Fluid Control Components: Industrial valves, pump bodies, valve cores, and petroleum well pump accessories.
- Mechanical Parts: Transmission shafts, wear-resistant gaskets, industrial springs, and separating filter screens.
- Medical & Precision Tools: Low-load surgical instruments, dental tools, and precision machinery blades.
- General Engineering: Heat-resistant fasteners, furnace accessories, and high-hardness structural parts for mechanical equipment.
6. Processing & Usage Notes
410 martensitic stainless steel requires professional heat treatment to maximize performance. The recommended austenitizing temperature ranges from 982°C to 1066°C, followed by oil quenching for rapid cooling. Tempering treatment at 204°C–649°C is necessary to eliminate internal stress and improve material toughness. Important Temper Brittleness Warning: 410 stainless steel exhibits severe temper embrittlement when tempered in the range of 400°C–565°C. Tempering within this interval is not recommended for any load-bearing parts; avoid using 538°C tempering process for stressed structural components. Weldability is relatively poor compared with 304 stainless steel; preheating (200-300°C) and post-weld stress-relieving tempering are required for welding processing to avoid cracking, instead of complete annealing which will cause grain coarsening. This material is not recommended for highly corrosive environments such as strong acid, alkali, and high-chloride salt water.
7. Physical Properties
Physical properties of annealed grade 410 stainless steels
| Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (μm/m/°C) | Thermal Conductivity (W/m.K) | Specific Heat 0-100 °C (J/kg.K) | Electrical Resistivity (nΩ.m) | |||
|---|---|---|---|---|---|---|---|---|---|
| 0-100 °C | 0-315 °C | 0-538 °C | at 100 °C | at 500 °C | |||||
| 410 | 7800 | 200 | 9.9 | 11 | 11.5 | 24.9 | 28.7 | 460 | 570 |
Grade Specification Comparison
Grade specifications of 410 grade stainless steels
| Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
|---|---|---|---|---|---|---|---|
| BS | En | No | Name | ||||
| 410 | S41000 | 410S21 | 56A | 1.4006 | X12Cr13 | 2302 | SUS 410 |
Note: All data in this document are derived from official factory test reports and ASTM standard specifications for reference only; specific parameters shall prevail with actual delivery inspection reports.
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