Stainless Steel 1.4962 +AT (Solution annealed)
Heat-treated state · default condition
EN 1.4962
Standard supply condition for seamless superheater tube and bar: maximum ductility, homogeneous austenite for long-term creep service.
Values for the +AT condition
Other 1.4962 tempers and conditions
1.4962 is listed in 2 conditions; see the grade overview at 1.4962.
- +AT
- +WW
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
+ATDefaultThis page Solution annealed | Standard supply condition for seamless superheater tube and bar: maximum ductility, homogeneous austenite for long-term creep service. | 320 | 700 | 38 | 185 HB | — |
Warm worked | Choose when higher room- and mid-temperature proof strength is needed (bolting, thin-wall tube) and full creep-ductility of the annealed state is not required. | 480 | 800 | 22 | 23 HRC | — |
What is 1.4962 +AT?
1.4962 +AT is 1.4962 heat treated to +AT — standard supply condition for seamless superheater tube and bar: maximum ductility, homogeneous austenite for long-term creep service. 1.4962 +AT has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 700 MPa (102 ksi) — weaker than 60% of stainless steel grades. Elongation at break is 38% and the elastic modulus is 200 GPa (29 Msi). 1.4962 +AT has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Limitations
- Low electrical conductivity — 2 % IACS, worse than 77% of stainless steel grades
1.4962 +AT properties
Typical room-temperature values for 1.4962 +AT; 16 are specific to this condition. Other listed values are 1.4962 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4962 +AT has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Mechanical13
1.4962 +AT has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 700 MPa (102 ksi) — weaker than 60% of stainless steel grades. Elongation at break is 38% and the elastic modulus is 200 GPa (29 Msi).
Thermal5
1.4962 +AT 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
1.4962 +AT 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 1.4962 +AT takes about 57 MJ of energy and emits 4.6 kg of CO₂ — more than 62% of stainless steel grades. Typical recycled content is 50%.
Manufacturability7
1.4962 +AT's machinability is poor (33/100, worse than 57% of stainless steel grades); weldability good (55/100); formability good (58/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4962 +AT
Is 1.4962 easy to machine?
Gummy and strongly work-hardening — use rigid setups, sharp carbide (coated) tools, low speed/high feed, generous flood coolant and avoid dwelling; TiC and borides accelerate edge wear.
Can 1.4962 be welded?
Weldable by TIG/MIG/SMAW with matched or 16-8-2 / Ni-base filler, but boron raises hot-cracking risk: minimise heat input and restraint, no preheat, interpass < 150 °C, and solution anneal where design permits.
Can 1.4962 be formed, bent or molded?
Hot working 1150–900 °C followed by solution anneal at 1050–1100 °C with rapid cooling; cold forming needs ~40–50 % more force than 304 and intermediate anneals for severe draws.
What surface finishes work on 1.4962?
Pickle and passivate after hot work or welding to restore the Cr oxide film; can be ground, electropolished or shot-blasted — no anodizing.
1.4962 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 |
|---|---|---|
| Chigh-C for creep strength | 0.08 – 0.16 | 0.12 |
| Si | ≤ 0.8 | 0.4 |
| Mn | ≤ 1.5 | 1 |
| P | ≤ 0.04 | — |
| S | ≤ 0.02 | — |
| Cr | 15.5 – 17.5 | 16.5 |
| Ni | 12.5 – 14.5 | 13.5 |
| Wsolid-solution strengthener | 2 – 3 | 2.5 |
| TiMC carbide former / stabiliser | 0.3 – 0.8 | 0.55 |
| Bgrain-boundary creep strengthener | 0 – 0.01 | 0.01 |
| Fe | balance | — |
1.4962 +AT — frequently asked
What is 1.4962 +AT used for?
1.4962 +AT is typically used for superheater tubing, boiler headers, high-temperature bolting and steam turbine components. In short: tungsten-boron creep grade; 700 °C service limit; tube and bolting alloy.
What is the yield strength of 1.4962 +AT?
1.4962 +AT has a typical yield strength of 320 MPa (46.4 ksi) and a tensile strength of 700 MPa (102 ksi) — weaker than 60% of stainless steel grades. Strength varies by condition: see the 2 listed tempers.
Is 1.4962 +AT easy to machine?
Not especially — machinability is rated poor (33/100, worse than 57% of stainless steel grades). Gummy and strongly work-hardening — use rigid setups, sharp carbide (coated) tools, low speed/high feed, generous flood coolant and avoid dwelling; TiC and borides accelerate edge wear.
Can 1.4962 +AT be welded?
Yes — weldability is rated good (55/100). Weldable by TIG/MIG/SMAW with matched or 16-8-2 / Ni-base filler, but boron raises hot-cracking risk: minimise heat input and restraint, no preheat, interpass < 150 °C, and solution anneal where design permits.
What surface finishes work on 1.4962 +AT?
Pickle and passivate after hot work or welding to restore the Cr oxide film; can be ground, electropolished or shot-blasted — no anodizing.
Can 1.4962 +AT be formed, bent or molded?
Hot working 1150–900 °C followed by solution anneal at 1050–1100 °C with rapid cooling; cold forming needs ~40–50 % more force than 304 and intermediate anneals for severe draws.
What is the maximum service temperature of 1.4962 +AT?
1.4962 +AT 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 10302 — Creep resisting steels, nickel and cobalt alloys — CEN (2008)
- EN 10216-2 — Seamless steel tubes for pressure purposes, alloy/creep-resisting steels — CEN (2020)
- DIN 17459 (withdrawn) — Seamless tubes of creep-resisting austenitic steels — DIN (1992)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- Stahlschlüssel (Key to Steel) — Verlag Stahlschlüssel Wegst (2019)
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.