Stainless 410 · UNS S41000 · W. Nr. 1.4006
Stainless 410 (S41000): composition, properties, fittings and flanges
Stainless 410 (S41000, W. Nr. 1.4006) is Martensitic chromium stainless steel. Stainless 410 is specified at Chromium 11.50 - 13.50, Nickel 0.75 max. 410 is the basic hardenable martensitic stainless: 12 % chromium gives corrosion resistance above carbon steel, and a simple quench and temper takes it to useful hardness for wear…
- UNS
- S41000
- W. Nr.
- 1.4006
- Density
- 7.75 g/cm³ (0.280 lb/in³)
- Key strength
- 485 MPa / 70 ksi
Identification and standards
| Short form | Stainless 410 · UNS S41000 · W. Nr. 1.4006 |
|---|---|
| Classification | Martensitic chromium stainless steel |
| UNS | S41000 |
| Werkstoff number | 1.4006 |
| Material family | Stainless Steel |
Chemical composition
| Element | Composition (wt %) | Why it is there |
|---|---|---|
| Chromium (Cr) | 11.50 - 13.50 | Corrosion and oxidation resistance |
| Carbon (C) | 0.08 - 0.15 | Hardening response |
| Manganese (Mn) | 1.00 max | - |
| Silicon (Si) | 1.00 max | - |
| Nickel (Ni) | 0.75 max | Residual |
| Phosphorus (P) | 0.040 max | - |
| Sulphur (S) | 0.030 max | - |
| Iron (Fe) | Balance | Matrix |
Note Single figures are maximum limits unless shown as a range. Always confirm against the heat-specific EN 10204 3.1 certificate supplied with your order.
Mechanical properties
| Tensile strength, min (annealed) | 485 MPa / 70 ksi |
|---|---|
| 0.2 % yield strength, min (annealed) | 275 MPa / 40 ksi |
| Elongation in 2 in, min (annealed) | 20 % |
| Typical hardness, hardened and tempered | 30 - 40 HRC |
| Maximum recommended service temperature | About 650 °C |
Warning Values depend on product form, section thickness and heat treatment. Larger sections generally achieve lower strength than thin product; always design against the applicable code allowable stress rather than these figures.
Physical properties
| Density | 7.75 g/cm³ (0.280 lb/in³) |
|---|---|
| Melting range | 1480 - 1530 °C (2700 - 2790 °F) |
| Modulus of elasticity | 200 GPa (29.0 x 10⁶ psi) |
| Thermal conductivity at 20 °C | 24.9 W/m·K |
| Mean coefficient of thermal expansion, 20-100 °C | 10.4 µm/m·°C |
| Specific heat capacity | 460 J/kg·K |
Specifications by product form
| Forgings & flanges | ASTM A182 F6a · ASME SA-182 (UNS S41000) |
|---|---|
| Butt weld fittings | ASTM A403 WP410 family or to order |
| Seamless pipe & tube | ASTM A268 / A312 TP410 or to order |
| Plate / sheet / strip | ASTM A240 410 · ASME SA-240 |
| Bar / rod | ASTM A276 / A479 |
| Welding consumables | ER410, with preheat and post-weld temper |
| UNS / EN / China | UNS S41000 · W. Nr. 1.4006 · GB 12Cr13 |
Product forms available
Hangbo supplies this grade in the following forms. Sizes outside the listed range can often be produced to order.
- Forged flanges blanks and finished flanges to ASME B16.5, B16.47 Series A/B and B16.36
- Butt weld elbows, tees, reducers, caps and stub ends to ASME B16.9 and MSS SP-43
- Seamless pipe and tube to the applicable ASTM / ASME pipe specification
- Forged rings, discs and hubs machined to your drawing
Typical applications
- Valve trim, stems, seats and gate components
- Pump shafts, turbine blades and compressor parts
- Fasteners, springs and wear-resistant machine parts
- Refinery and petrochemical internal components
Welding, forming and machining
- Welding
- Preheat to 200 - 300 °C, weld with ER410 filler and temper immediately after welding. Martensitic grades crack if they are allowed to cool untempered from welding temperature.
- Heat treatment
- Anneal at 830 - 885 °C and furnace cool, or harden by austenitising at 925 - 1010 °C, oil quench and temper at 205 - 650 °C to the required hardness.
- Hot and cold forming
- Hot work in the range stated by the mill for this grade, then re-solution or re-age before final machining so that the delivered condition matches the certificate.
- Machining
- Machine with sharp carbide or high-speed steel tooling, positive rake, constant feed and ample coolant. Never dwell - the surface work-hardens quickly.
Buy Stainless 410 from Hangbo
Material is supplied with full heat-number traceability, solution annealing or ageing performed under calibrated furnace control, and an EN 10204 3.1 certificate covering chemical analysis, mechanical properties, heat treatment records and the agreed NDT scope. Positive material identification and third party inspection and test reports from SGS are available for critical service.