Stainless Steel 1.4982 ST+SR
Heat-treated state
EN 1.4982
ST+SR = solution annealed + stabilizing/stress-relief ~750 °C
Choose for welded superheater assemblies and creep service where NbC/VC precipitation and residual-stress removal before start-up are wanted.
Values for the ST+SR condition
Other 1.4982 tempers and conditions
1.4982 is listed in 4 conditions; see the grade overview at 1.4982.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
STDefault Solution annealed | Standard supply condition for tube, pipe and bar; best ductility and creep ductility, baseline for all service exposure. | 330 | 660 | 45 | 185 HB | — |
ST+SRThis page Solution annealed + stabilizing/stress-relief ~750 °C | Choose for welded superheater assemblies and creep service where NbC/VC precipitation and residual-stress removal before start-up are wanted. | 370 | 700 | 38 | 200 HB | 2 % IACS |
Warm worked (≈15–25 % reduction) bolting condition | Standard high-temperature bolting condition per DIN 17240: warm/cold deformation after solution treatment raises proof stress and relaxation resistance at 550–650 °C. | 560 | 780 | 25 | 22 HRC | 2 % IACS |
Cold drawn | Bright cold-drawn bar for machined fasteners and studs where higher room-temperature proof stress and better surface/tolerance are needed. | 600 | 800 | 22 | 250 HB | — |
What is 1.4982 ST+SR?
1.4982 ST+SR is 1.4982 heat treated to ST+SR — choose for welded superheater assemblies and creep service where NbC/VC precipitation and residual-stress removal before start-up are wanted. 1.4982 ST+SR has a yield strength of 370 MPa (53.7 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 50% of stainless steel grades. Elongation at break is 38% and the elastic modulus is 200 GPa (29 Msi). 1.4982 ST+SR has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,370°C (2,498 °F). ST is the default condition FabDigit quotes; ST+SR is available on request or by drawing note.
Limitations
- Low electrical conductivity — 2 % IACS, worse than 77% of stainless steel grades
1.4982 ST+SR properties
Typical room-temperature values for 1.4982 ST+SR; 22 are specific to this condition. Other listed values are 1.4982 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4982 ST+SR has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,370°C (2,498 °F).
Mechanical14
1.4982 ST+SR has a yield strength of 370 MPa (53.7 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 50% of stainless steel grades. Elongation at break is 38% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1.4982 ST+SR is rated for continuous service to 700°C (1,292 °F). It conducts heat at 14.5 W/m·K (8.38 BTU/hr·ft·°F), worse than 72% of stainless steel grades. Thermal expansion is 17 µm/m·K (9.44 µin/in·°F).
Electrical3
1.4982 ST+SR conducts electricity at 2 % IACS, worse than 77% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (57/100), worse than 66% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4982 ST+SR takes about 58 MJ of energy and emits 4.6 kg of CO₂ — more than 66% of stainless steel grades. Typical recycled content is 40%.
Manufacturability7
1.4982 ST+SR's machinability is poor (28/100, worse than 79% of stainless steel grades); weldability good (65/100); formability fair (50/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4982 ST+SR
Is 1.4982 easy to machine?
Machines like a tough 316 but harder: rigid setups, positive-rake sharp carbide, heavy constant feed and flood coolant to avoid work-hardened glazing; expect ~30 % of 1212 rates.
Can 1.4982 be welded?
Readily welded by TIG/MMA/SAW with matching Nb-bearing 15Cr-10Ni-6Mn filler; keep heat input and interpass temperature low to limit hot-cracking, no post-weld heat treatment mandatory but 750 °C stabilizing is common for creep duty.
Can 1.4982 be formed, bent or molded?
Hot work 1150–950 °C then solution treat; cold forming possible but the high work-hardening rate demands high forming loads and intermediate anneals.
What surface finishes work on 1.4982?
Pickle and passivate after hot work or welding to restore the chromium oxide film; electropolishing gives good surface for steam service; no anodizing (ferrous).
1.4982 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 | 0.06 – 0.15 | 0.1 |
| Si | 0.2 – 1 | 0.5 |
| Mnhigh Mn stabilises austenite and raises N solubility | 5.5 – 7 | 6.2 |
| P | ≤ 0.04 | — |
| S | ≤ 0.02 | — |
| Cr | 14 – 16 | 15 |
| Ni | 9 – 11 | 10 |
| Mo | 0.8 – 1.2 | 1 |
| Nbprimary creep strengthener (NbC) | 0.75 – 1.25 | 1 |
| V | 0.15 – 0.4 | 0.25 |
| Bgrain-boundary strengthening | 0 – 0.01 | 0.01 |
| Fe | balance | — |
1.4982 ST+SR — frequently asked
What is 1.4982 ST+SR used for?
1.4982 ST+SR is typically used for high-temperature bolts, turbine casings and boiler support components. In short: most weldable creep austenitic; nb/V/B microalloyed; 700 °C bolting steel.
What is the yield strength of 1.4982 ST+SR?
1.4982 ST+SR has a typical yield strength of 370 MPa (53.7 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 50% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is 1.4982 ST+SR easy to machine?
Not especially — machinability is rated poor (28/100, worse than 79% of stainless steel grades). Machines like a tough 316 but harder: rigid setups, positive-rake sharp carbide, heavy constant feed and flood coolant to avoid work-hardened glazing; expect ~30 % of 1212 rates.
Can 1.4982 ST+SR be welded?
Yes — weldability is rated good (65/100). Readily welded by TIG/MMA/SAW with matching Nb-bearing 15Cr-10Ni-6Mn filler; keep heat input and interpass temperature low to limit hot-cracking, no post-weld heat treatment mandatory but 750 °C stabilizing is common for creep duty.
What surface finishes work on 1.4982 ST+SR?
Pickle and passivate after hot work or welding to restore the chromium oxide film; electropolishing gives good surface for steam service; no anodizing (ferrous).
Can 1.4982 ST+SR be formed, bent or molded?
Hot work 1150–950 °C then solution treat; cold forming possible but the high work-hardening rate demands high forming loads and intermediate anneals.
What is the maximum service temperature of 1.4982 ST+SR?
1.4982 ST+SR 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 1.4982-ST and 1.4982-CD?
ST is the default condition — standard supply condition for tube, pipe and bar; best ductility and creep ductility, baseline for all service exposure. CD: bright cold-drawn bar for machined fasteners and studs where higher room-temperature proof stress and better surface/tolerance are needed. Yield strength is 330 MPa in ST versus 600 MPa in CD.
Sources
- DIN 17240 — Heat-resisting steels for bolts and nuts (X10CrNiMoMnNbVB15-10-1, 1.4982) — DIN (1976)
- EN 10302 — Creep resisting steels, nickel and cobalt alloys — CEN (2008)
- Esshete 1250 austenitic creep-resisting steel data sheet — Sandvik / Corus Engineering Steels (2010)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- Stahlschlüssel / Key to Steel — material 1.4982 — 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.