Stainless Steel 1.4983-AT
Precip hard · default condition
EN 1.4983
Standard delivery condition for tube, plate and bar used in creep service; maximum ductility and corrosion resistance.
Values for the AT condition
Other 1.4983 tempers and conditions
1.4983 is listed in 4 conditions; see the grade overview at 1.4983.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Forged + solution annealed (headers, flanges, bolting blanks) | Heavy-section forged components for high-temperature pressure parts, tested per VdTÜV creep requirements. | 250 | 570 | 38 | 165 HB | 2.3 % IACS |
ATDefaultThis page solution annealed (approx. 1050–1100 °C, rapid cooled) | Standard delivery condition for tube, plate and bar used in creep service; maximum ductility and corrosion resistance. | 265 | 590 | 40 | 170 HB | 2.3 % IACS |
+AT + stabilizing anneal | Choose when maximum immunity to intergranular corrosion after long hot service or heavy weld fabrication is required. | 280 | 590 | 38 | 175 HB | 2.3 % IACS |
Cold drawn | For bar stock and small-diameter tubing needing tighter tolerance, better surface and higher room-temperature strength. | 450 | 700 | 25 | 19 HRC | 2.3 % IACS |
What is 1.4983-AT?
1.4983-AT is 1.4983 in the AT condition — standard delivery condition for tube, plate and bar used in creep service; maximum ductility and corrosion resistance. 1.4983-AT has a yield strength of 265 MPa (38.4 ksi) and a tensile strength of 590 MPa (85.6 ksi) — weaker than 81% of stainless steel grades. Elongation at break is 40% and the elastic modulus is 200 GPa (29 Msi). 1.4983-AT has a density of 8 g/cm³ (0.289 lb/in³), heavier than 92% of stainless steel grades. It melts at 1,385°C (2,525 °F).
Advantages
- Tough — resists crack growth — 200 MPa·√m (182 ksi·√in), better than 86% of stainless steel grades
- Forms and bends easily — 70/100, better than 79% of stainless steel grades
Limitations
- Low strength — 265 MPa (38.4 ksi), worse than 81% of stainless steel grades
1.4983-AT properties
Typical room-temperature values for 1.4983-AT; 23 are specific to this condition. Other listed values are 1.4983 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4983-AT has a density of 8 g/cm³ (0.289 lb/in³), heavier than 92% of stainless steel grades. It melts at 1,385°C (2,525 °F).
Mechanical16
1.4983-AT has a yield strength of 265 MPa (38.4 ksi) and a tensile strength of 590 MPa (85.6 ksi) — weaker than 81% of stainless steel grades. Elongation at break is 40% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1.4983-AT is rated for continuous service to 650°C (1,202 °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 µm/m·K (8.89 µin/in·°F).
Electrical3
1.4983-AT conducts electricity at 2.3 % IACS, better than 55% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is very good (72/100), better than 73% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4983-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 60%.
Manufacturability7
1.4983-AT's machinability is poor (33/100, worse than 57% of stainless steel grades); weldability good (65/100); 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 1.4983-AT
Is 1.4983 easy to machine?
Machines like a gummy 316Ti — rigid setups, sharp positive-rake carbide, heavy flood coolant, low speed/high feed to avoid work hardening on Ti/B carbide inclusions.
Can 1.4983 be welded?
Weld with GTAW/GMAW/SMAW using Ti- or Nb-stabilized 318-type filler, low heat input and interpass under about 150 °C; the boron addition raises hot-cracking sensitivity, so avoid heavy restraint and wide weaves.
Can 1.4983 be formed, bent or molded?
Good cold formability in the annealed condition but high work-hardening rate; hot form at 1100–900 °C then solution anneal and rapid cool to restore creep properties.
What surface finishes work on 1.4983?
Pickle and passivate after hot work or welding (ASTM A967); electropolishing or mechanical polishing works, though Ti carbonitride stringers limit true mirror quality — anodizing is not applicable.
1.4983 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 | ≤ 0.75 | 0.45 |
| Mn | ≤ 2 | 1.2 |
| P | ≤ 0.04 | 0.02 |
| S | ≤ 0.02 | 0.01 |
| Cr | 16 – 18 | 17 |
| Ni | 12 – 14.5 | 13 |
| Mo | 1.6 – 2 | 1.8 |
| Tistabilizing addition, typically ≥ 5×C | 0.3 – 0.6 | 0.45 |
| Bcreep-strengthening micro-addition characteristic of this grade | 0 – 0.01 | 0 |
| N | ≤ 0.03 | 0.02 |
| Fe | balance | — |
1.4983-AT — frequently asked
What is 1.4983-AT used for?
1.4983-AT is typically used for superheater tubes, pressure vessel components and power plant piping. In short: boron-modified 316Ti; 650 °C stress-rupture duty; bright-annealed tube available.
What is the yield strength of 1.4983-AT?
1.4983-AT has a typical yield strength of 265 MPa (38.4 ksi) and a tensile strength of 590 MPa (85.6 ksi) — weaker than 81% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is 1.4983-AT easy to machine?
Not especially — machinability is rated poor (33/100, worse than 57% of stainless steel grades). Machines like a gummy 316Ti — rigid setups, sharp positive-rake carbide, heavy flood coolant, low speed/high feed to avoid work hardening on Ti/B carbide inclusions.
Can 1.4983-AT be welded?
Yes — weldability is rated good (65/100). Weld with GTAW/GMAW/SMAW using Ti- or Nb-stabilized 318-type filler, low heat input and interpass under about 150 °C; the boron addition raises hot-cracking sensitivity, so avoid heavy restraint and wide weaves.
What surface finishes work on 1.4983-AT?
Pickle and passivate after hot work or welding (ASTM A967); electropolishing or mechanical polishing works, though Ti carbonitride stringers limit true mirror quality — anodizing is not applicable.
Can 1.4983-AT be formed, bent or molded?
Good cold formability in the annealed condition but high work-hardening rate; hot form at 1100–900 °C then solution anneal and rapid cool to restore creep properties.
What is the maximum service temperature of 1.4983-AT?
1.4983-AT is rated for continuous use to about 650°C (1,202 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4983-AT and 1.4983-CD?
AT is the default condition — standard delivery condition for tube, plate and bar used in creep service; maximum ductility and corrosion resistance. CD: for bar stock and small-diameter tubing needing tighter tolerance, better surface and higher room-temperature strength. Yield strength is 265 MPa in AT versus 450 MPa in CD.
Sources
- EN 10302 — Creep resisting steels, nickel and cobalt alloys — CEN (2008)
- EN 10088-1 — Stainless steels: list of stainless steels — CEN (2014)
- VdTÜV Werkstoffblatt 432 — X6CrNiMoTiB17-13 (1.4983) — VdTÜV (2010)
- 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-resistant austenitic stainless tube grades (316Ti/1.4571, 1.4981, 1.4983) — European special steel 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.