Stainless Steel 1.4986-SA (Solution annealed)
Heat-treated state · default condition
EN 1.4986
Standard supply condition for tube, bar and plate; best ductility, weldability and long-term creep behaviour.
Values for the SA condition
Other 1.4986 tempers and conditions
1.4986 is listed in 4 conditions; see the grade overview at 1.4986.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Hot finished | Hot-finished plate, bar and seamless tube supplied descaled and solution treated; properties essentially those of the SA condition. | 265 | 610 | 38 | 180 HB | 2 % IACS |
SADefaultThis page Solution annealed | Standard supply condition for tube, bar and plate; best ductility, weldability and long-term creep behaviour. | 275 | 620 | 40 | 175 HB | — |
Solution annealed then cold drawn / lightly cold worked | Cold-drawn tube and bar with tighter tolerances and better surface, moderately raised proof strength. | 420 | 700 | 30 | 17 HRC | 2 % IACS |
Solution annealed + 10–20 % cold work | Deliberate cold deformation of ~15 % used on superheater tubing to boost 600–700 °C creep-rupture strength via fine carbide/boride precipitation. | 550 | 780 | 22 | 23 HRC | 2 % IACS |
What is 1.4986-SA?
1.4986-SA is 1.4986 heat treated to SA — standard supply condition for tube, bar and plate; best ductility, weldability and long-term creep behaviour. 1.4986-SA has a yield strength of 275 MPa (39.9 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 77% of stainless steel grades. Elongation at break is 40% and the elastic modulus is 197 GPa (28.6 Msi). 1.4986-SA has a density of 8 g/cm³ (0.289 lb/in³), heavier than 92% of stainless steel grades. It melts at 1,370°C (2,498 °F).
Advantages
- Forms and bends easily — 70/100, better than 79% of stainless steel grades
Limitations
- Low strength — 275 MPa (39.9 ksi), worse than 77% of stainless steel grades
- Low electrical conductivity — 2 % IACS, worse than 77% of stainless steel grades
1.4986-SA properties
Typical room-temperature values for 1.4986-SA; 14 are specific to this condition. Other listed values are 1.4986 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4986-SA has a density of 8 g/cm³ (0.289 lb/in³), heavier than 92% of stainless steel grades. It melts at 1,370°C (2,498 °F).
Mechanical14
1.4986-SA has a yield strength of 275 MPa (39.9 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 77% of stainless steel grades. Elongation at break is 40% and the elastic modulus is 197 GPa (28.6 Msi).
Thermal6
1.4986-SA is rated for continuous service to 700°C (1,292 °F). It conducts heat at 15 W/m·K (8.67 BTU/hr·ft·°F), worse than 59% of stainless steel grades. Thermal expansion is 16.5 µm/m·K (9.17 µin/in·°F).
Electrical3
1.4986-SA conducts electricity at 2 % IACS, worse than 77% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), worse than 52% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4986-SA takes about 62 MJ of energy and emits 5.2 kg of CO₂ — more than 75% of stainless steel grades. Typical recycled content is 50%.
Manufacturability8
1.4986-SA's machinability is poor (33/100, worse than 57% of stainless steel grades); weldability good (60/100); formability very good (70/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4986-SA
Is 1.4986 easy to machine?
Machines like a tough 316: low speed, heavy positive-rake carbide tooling, rigid setup and flood coolant to fight work hardening and built-up edge.
Can 1.4986 be welded?
TIG/MIG/SAW with Nb-stabilized 16-16-2 or matching filler; boron increases hot-cracking sensitivity, so keep heat input low, avoid restraint and use interpass ≤150 °C.
Can 1.4986 be formed, bent or molded?
Excellent hot workability at 1150–1200 °C; cold forming is possible but with high work-hardening rate — solution anneal at 1050–1120 °C with rapid cooling after heavy forming.
What surface finishes work on 1.4986?
Pickle/passivate after hot work or welding to restore the passive film; electropolishing or mechanical polishing gives good surfaces — no anodizing.
1.4986 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 |
|---|---|---|
| C | 0.04 – 0.08 | 0.06 |
| Si | ≤ 0.7 | 0.45 |
| Mn | ≤ 1.5 | 1.2 |
| Pimpurity limit | ≤ 0.04 | — |
| Simpurity limit | ≤ 0.02 | — |
| Cr | 15.5 – 17.5 | 16.5 |
| Ni | 15.5 – 17.5 | 16.3 |
| Mo | 1.6 – 2 | 1.8 |
| Nbstabilizing addition, typically ≥10×C | 0.6 – 1.2 | 0.85 |
| Bmicro-boron for creep strength; key difference vs 1.4981 | 0 – 0.01 | 0.01 |
| N | ≤ 0.05 | — |
| Fe | balance | — |
1.4986-SA — frequently asked
What is 1.4986-SA used for?
1.4986-SA is typically used for boiler headers, high-temperature reactor components and power plant piping. In short: creep-strength 16-16 austenitic; nb and B stabilised; 700 °C service rating.
What is the yield strength of 1.4986-SA?
1.4986-SA has a typical yield strength of 275 MPa (39.9 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 77% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is 1.4986-SA easy to machine?
Not especially — machinability is rated poor (33/100, worse than 57% of stainless steel grades). Machines like a tough 316: low speed, heavy positive-rake carbide tooling, rigid setup and flood coolant to fight work hardening and built-up edge.
Can 1.4986-SA be welded?
Yes — weldability is rated good (60/100). TIG/MIG/SAW with Nb-stabilized 16-16-2 or matching filler; boron increases hot-cracking sensitivity, so keep heat input low, avoid restraint and use interpass ≤150 °C.
What surface finishes work on 1.4986-SA?
Pickle/passivate after hot work or welding to restore the passive film; electropolishing or mechanical polishing gives good surfaces — no anodizing.
Can 1.4986-SA be formed, bent or molded?
Excellent hot workability at 1150–1200 °C; cold forming is possible but with high work-hardening rate — solution anneal at 1050–1120 °C with rapid cooling after heavy forming.
What is the maximum service temperature of 1.4986-SA?
1.4986-SA 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.
What is the difference between 1.4986-SA and 1.4986-HF?
SA is the default condition — standard supply condition for tube, bar and plate; best ductility, weldability and long-term creep behaviour. HF: hot-finished plate, bar and seamless tube supplied descaled and solution treated; properties essentially those of the SA condition. Yield strength is 275 MPa in SA versus 265 MPa in HF.
Sources
- EN 10302 — Creep resisting steels, nickel and cobalt alloys — CEN (2008)
- DIN 17459 — Seamless circular tubes of austenitic creep-resisting steels — DIN (1992)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials — ASM International (2005)
- Creep-resisting austenitic tube grades 1.4981 / 1.4986 datasheets — European tube producers (2020)
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.