Stainless Steel 1.4000 +A (Annealed)
Heat-treated state · default condition
EN 1.4000
Default stocked condition for plate, sheet, bar and tube; best formability and toughness.
Values for the +A condition
Other 1.4000 tempers and conditions
1.4000 is listed in 3 conditions; see the grade overview at 1.4000.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
+ADefaultThis page Annealed | Default stocked condition for plate, sheet, bar and tube; best formability and toughness. | 285 | 480 | 30 | 150 HB | — |
Stress relieved | For cold-drawn bar or formed parts that must stay dimensionally stable after machining. | 470 | 620 | 17 | 185 HB | 2.9 % IACS |
Cold drawn | Choose for straight bright bar with higher strength, tighter tolerance and better chip control than annealed. | 520 | 660 | 14 | 195 HB | 2.9 % IACS |
What is 1.4000 +A?
1.4000 +A is 1.4000 heat treated to +A — default stocked condition for plate, sheet, bar and tube; best formability and toughness. 1.4000 +A has a yield strength of 285 MPa (41.3 ksi) and a tensile strength of 480 MPa (69.6 ksi) — weaker than 74% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 220 GPa (31.9 Msi). 1.4000 +A has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,480°C (2,696 °F).
Advantages
- Conducts heat well — 30 W/m·K (17.3 BTU/hr·ft·°F), better than 99% of stainless steel grades
- Low embodied carbon — 2.9 kg CO₂/kg, better than 98% of stainless steel grades
- Easy to machine — 50/100, better than 90% of stainless steel grades
- High electrical conductivity — 2.9 % IACS, better than 87% of stainless steel grades
Limitations
- Needs corrosion protection — 40/100, worse than 93% of stainless steel grades
- Hard to polish — 60/100, worse than 80% of stainless steel grades
1.4000 +A properties
Typical room-temperature values for 1.4000 +A; 10 are specific to this condition. Other listed values are 1.4000 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4000 +A has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,480°C (2,696 °F).
Mechanical15
1.4000 +A has a yield strength of 285 MPa (41.3 ksi) and a tensile strength of 480 MPa (69.6 ksi) — weaker than 74% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 220 GPa (31.9 Msi).
Thermal6
1.4000 +A is rated for continuous service to 700°C (1,292 °F). It conducts heat at 30 W/m·K (17.3 BTU/hr·ft·°F), better than 99% of stainless steel grades. Thermal expansion is 10.5 µm/m·K (5.83 µin/in·°F).
Electrical3
1.4000 +A conducts electricity at 2.9 % IACS, better than 87% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is fair (40/100), worse than 93% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4000 +A takes about 38 MJ of energy and emits 2.9 kg of CO₂ — less than 99% of stainless steel grades. Typical recycled content is 60%.
Manufacturability8
1.4000 +A's machinability is fair (50/100, better than 90% of stainless steel grades); weldability very good (70/100); formability good (65/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4000 +A
Is 1.4000 easy to machine?
Machines like a soft low-alloy steel at roughly half of 1212 speed; use sharp positive-rake tooling, rigid setups and generous coolant to avoid the gummy built-up edge typical of low-carbon 13Cr.
Can 1.4000 be welded?
Readily welded by TIG/MIG/SMAW; use 309L or matching 410-type filler, preheat 100–200 °C on thick sections and consider a 700–760 °C post-weld anneal to restore HAZ ductility.
Can 1.4000 be formed, bent or molded?
Cold forms and deep draws reasonably well in the annealed condition (less than 430 or 304); allow generous bend radii (≥1t) and avoid heavy work near 400–500 °C to prevent embrittlement.
What surface finishes work on 1.4000?
Pickle and passivate after hot work or welding to rebuild the chromium oxide; takes a fair mechanical polish, and is often aluminized or painted for high-temperature and outdoor service. Not anodizable.
1.4000 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| CEN 10088-2 X6Cr13; ASTM A240 410S also 0.08 max | ≤ 0.08 | 0.05 |
| Si | ≤ 1 | 0.4 |
| Mn | ≤ 1 | 0.5 |
| P | ≤ 0.04 | 0.03 |
| SASTM A240 410S allows 0.030 max | ≤ 0.02 | 0.01 |
| Cr410S/SUS410S: 11.5–13.5 | 12 – 14 | 13 |
| Nilimit per ASTM A240 410S; not specified in EN 10088-2 | ≤ 0.6 | 0.25 |
| Fe | balance | — |
1.4000 +A — frequently asked
What is 1.4000 +A used for?
1.4000 +A is typically used for cutlery blanks, kitchen equipment, mild chemical exposure parts and boiler fittings. In short: cheapest 13Cr ferritic; non-hardenable 410 variant; weldable without heat treatment.
What is the yield strength of 1.4000 +A?
1.4000 +A has a typical yield strength of 285 MPa (41.3 ksi) and a tensile strength of 480 MPa (69.6 ksi) — weaker than 74% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is 1.4000 +A easy to machine?
Reasonably — machinability is rated fair (50/100, better than 90% of stainless steel grades). Machines like a soft low-alloy steel at roughly half of 1212 speed; use sharp positive-rake tooling, rigid setups and generous coolant to avoid the gummy built-up edge typical of low-carbon 13Cr.
Can 1.4000 +A be welded?
Yes — weldability is rated very good (70/100). Readily welded by TIG/MIG/SMAW; use 309L or matching 410-type filler, preheat 100–200 °C on thick sections and consider a 700–760 °C post-weld anneal to restore HAZ ductility.
What surface finishes work on 1.4000 +A?
Pickle and passivate after hot work or welding to rebuild the chromium oxide; takes a fair mechanical polish, and is often aluminized or painted for high-temperature and outdoor service. Not anodizable.
Can 1.4000 +A be formed, bent or molded?
Cold forms and deep draws reasonably well in the annealed condition (less than 430 or 304); allow generous bend radii (≥1t) and avoid heavy work near 400–500 °C to prevent embrittlement.
What is the maximum service temperature of 1.4000 +A?
1.4000 +A is rated for continuous use to about 700°C (1,292 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- EN 10088-1/-2/-3 (X6Cr13, 1.4000) — CEN (2014)
- ASTM A240/A240M (UNS S41008, 410S) — ASTM International (2023)
- JIS G4305 (SUS410S) — JSA (2021)
- GB/T 3280 / GB/T 1220 (06Cr13) — SAC (2015)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels — ASM International (1990)
- Outokumpu Stainless Steel Handbook / 410S datasheet — Outokumpu (2021)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.