ASTM A511 MT 410 Stainless Steel Seamless Mechanical Tubing
ASTM A511 MT 410 Stainless Steel Seamless Mechanical Tubing - Properties, Equivalents and Applications
Comprehensive technical data for ASTM A511 MT 410 stainless steel pipe: chemical composition, mechanical and physical properties, and global equivalents. Suitable for mechanical and structural components requiring high strength and moderate corrosion resistance.
Cold drawing, hot finishing, heat treatment (annealing, hardening and tempering), machining
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ASTM A511 MT 410 Stainless Steel Seamless Mechanical Tubing Introduction
ASTM A511 MT 410 is a martensitic stainless steel supplied as seamless mechanical tubing. This grade offers a balanced combination of good mechanical strength, moderate corrosion resistance and hardenability through heat treatment. In the annealed condition it provides excellent machinability and ductility, while quenching and tempering can significantly increase hardness and tensile strength. MT 410 is widely used for parts that require better mechanical properties than austenitic grades in mildly corrosive environments. The material is magnetic in all conditions and can be welded with appropriate pre‑heating and post‑weld heat treatment.
ASTM A511 MT 410 Stainless Steel Seamless Mechanical Tubing Chemical composition according to ASTM A511
The chemical composition limits for grade MT 410 tubing are specified in ASTM A511. The alloy is a chromium martensitic stainless steel with controlled carbon to provide hardenability. All values are weight percent maximum unless a range is given.
| Element | Standard Value (%) | Remarks |
|---|---|---|
| Carbon (C) | 0.15 max | Increases hardenability |
| Manganese (Mn) | 1.00 max | Deoxidiser, improves hot workability |
| Phosphorus (P) | 0.040 max | Controlled for ductility |
| Sulfur (S) | 0.030 max | Controlled for machinability |
| Silicon (Si) | 1.00 max | Deoxidiser |
| Chromium (Cr) | 11.5 – 13.5 | Provides corrosion resistance and hardenability |
| Nickel (Ni) | – | Not specified (residual only) |
| Molybdenum (Mo) | – | Not added (residual) |
| Nitrogen (N) | – | Not controlled |
ASTM A511 MT 410 Stainless Steel Seamless Mechanical Tubing Typical physical properties
The following physical constants are typical for MT 410 (12 % Cr martensitic stainless steel) at room temperature unless otherwise noted. These values are not mandatory in ASTM A511 but are widely accepted and used for design calculations.
| Property | Typical Value | Unit | Reference Temperature / Condition |
|---|---|---|---|
| Density (ρ) | 7.74 | g/cm³ | 20 °C |
| Density (ρ) | 0.280 | lb/in³ | 68 °F |
| Modulus of elasticity in tension (E) | 200 | GPa | 20 °C |
| Modulus of elasticity in tension (E) | 29.0 × 10³ | ksi | 68 °F |
| Shear modulus (G) | 77 | GPa | 20 °C |
| Poisson"s ratio (ν) | 0.27 – 0.30 | – | Room temperature |
| Thermal expansion coefficient (α) | 9.9 | 10⁻⁶/°C | 20 – 100 °C (68 – 212 °F) |
| Thermal expansion coefficient (α) | 11.0 | 10⁻⁶/°C | 20 – 300 °C (68 – 572 °F) |
| Thermal conductivity (λ) | 24.9 | W/m·K | 100 °C (212 °F) |
| Thermal conductivity (λ) | 28.5 | W/m·K | 300 °C (572 °F) |
| Specific heat capacity (cp) | 460 | J/kg·K | 20 °C (68 °F) |
| Electrical resistivity (ρe) | 0.57 × 10⁻⁶ | Ω·m | 20 °C (68 °F) |
ASTM A511 MT 410 Stainless Steel Seamless Mechanical Tubing Mechanical properties – annealed condition
The mechanical property requirements for MT 410 tubing in the annealed (condition A) delivery state are taken from ASTM A511. The values represent longitudinal specimens tested at room temperature.
| Property | Standard Requirement | Unit | Test Condition |
|---|---|---|---|
| Tensile strength (Rm) | 450 min | MPa | Room temperature, longitudinal |
| Yield strength (ReH, 0.2 % offset) | 205 min | MPa | Room temperature, longitudinal |
| Elongation (A, 2 in. or 50 mm) | 20 min | % | Gauge length 50 mm |
| Hardness | 207 max | HBW | Typical average, annealed |
| Hardness | 92 max | HRB | Alternative Rockwell B reading |
ASTM A511 MT 410 Stainless Steel Seamless Mechanical Tubing Fully equivalent material standards and alternative grades
| Country / Region | Standard / Specification | Grade | Remarks |
|---|---|---|---|
| USA | UNS designation | S41000 | Base chemical composition |
| USA | ASTM A276 (bars and shapes) | Type 410 | Comparable chemical and mechanical properties for solid sections |
| USA | ASTM A479 (pressure vessel bars) | Type 410 | For pressure‑retaining parts |
| USA | ASTM A182 (forged fittings) | F6a Class 1 | Similar composition; heat treatment may differ |
| Europe | EN 10088‑2 (flat products) | 1.4006 (X12Cr13) | Nearest European grade, slightly different C range (0.08‑0.15) |
| Japan | JIS G4303 (bars) | SUS410 | Equivalent martensitic stainless grade |
| China | GB/T 1220 (bars) | 12Cr13 | Equivalent Chinese grade, similar limits |
| Germany (historical) | DIN 17440 | 1.4006 (X12Cr13) | Old designation, now replaced by EN |
ASTM A511 MT 410 Stainless Steel Seamless Mechanical Tubing Application Introduction
MT 410 seamless tubing is used wherever a combination of moderate corrosion resistance, high strength and good machinability is required. The annealed condition permits cold forming and machining; subsequent heat treatment can tailor hardness and toughness. Typical industries and products include:
Product Applications: Seamless hydraulic cylinder tubes, Pump shafts and sleeves, Valve stems and discs, Turbine blade root inserts, Precision mechanical tubing for automotive steering components, Cutting blades and knife stock
Processed into products: Machined bushings and spacers, Threaded fasteners (bolts, studs), Spindles and axles, Guide rods, Cam followers, Ingot molds for glass industry
Application industries: Automotive (valve components, shafts), Petrochemical (pump parts, valve stems), Power generation (turbine blades, fasteners), General engineering (bushings, spacers, mechanical shafts), Cutlery and kitchenware (blades, utensils), Hydraulic and pneumatic systems (cylinder tubes)
ASTM A511 MT 410 Stainless Steel Seamless Mechanical Tubing Similar / nearest alternative materials
| Country / Region | Standard / Specification | Grade | Remarks |
|---|---|---|---|
| USA | ASTM A276 / A479 | Type 410S | Lower carbon (0.08 max) improves weldability, similar corrosion resistance |
| USA | ASTM A511 | MT 403 | Lower Si (0.50 max) for improved formability; similar mechanicals |
| USA | ASTM A511 | MT 416 | Free‑machining variant with sulfur addition; lower corrosion resistance |
| Europe | EN 10088‑2 | 1.4021 (X20Cr13) | Higher carbon (0.16‑0.25) for greater hardness after hardening |
| Japan | JIS G4303 | SUS420J1 | Higher carbon (0.16‑0.25), can reach higher hardness levels |
Notes:
Heat treatment: MT 410 can be hardened by heating to 925‑1010 °C (1700‑1850 °F) and oil or air quenching. Tempering between 200 and 370 °C (400‑700 °F) raises toughness while retaining high strength. Welding: Preheat to 150‑260 °C (300‑500 °F) and post‑weld anneal or temper to avoid cracking. Corrosion resistance: Best in mild environments (fresh water, steam, organic acids); not suitable for severe chloride or reducing acid service. Certification: Mill test reports to EN 10204 3.1 are typically available upon request.
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