Stainless Steel 1.4818-AW (As-welded deposit)
Heat-treated state
EN 1.4818
Fabricated condition for furnace weldments; weld metal strength matches base metal but hot ductility and oxidation life are slightly lower than annealed parent.
Values for the AW condition
Other 1.4818 tempers and conditions
1.4818 is listed in 3 conditions; see the grade overview at 1.4818.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AnnealedDefault Solution Annealed (1050–1100 °C, rapid cool) | Standard supply condition for all product forms — maximum ductility, fully austenitic, best oxidation and corrosion performance. | 330 | 650 | 45 | 180 HB | — |
AWThis page As-welded deposit | Fabricated condition for furnace weldments; weld metal strength matches base metal but hot ductility and oxidation life are slightly lower than annealed parent. | 340 | 620 | 35 | 195 HB | 2 % IACS |
Cold drawn | Choose for tight tolerance, higher room-temperature strength and better chip control; strength gain is lost above ~600 °C by recovery. | 520 | 780 | 25 | 22 HRC | 2 % IACS |
What is 1.4818-AW?
1.4818-AW is 1.4818 heat treated to AW — fabricated condition for furnace weldments; weld metal strength matches base metal but hot ductility and oxidation life are slightly lower than annealed parent. 1.4818-AW has a yield strength of 340 MPa (49.3 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 55% of stainless steel grades. Elongation at break is 35% and the elastic modulus is 200 GPa (29 Msi). 1.4818-AW has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,400°C (2,552 °F). Annealed is the default condition FabDigit quotes; AW is available on request or by drawing note.
Advantages
- High service temperature — 1,000°C (1,832 °F), better than 88% of stainless steel grades
- Readily welded — 80/100, better than 80% of stainless steel grades
Limitations
- Low electrical conductivity — 2 % IACS, worse than 77% of stainless steel grades
- High embodied carbon — 5.5 kg CO₂/kg, worse than 77% of stainless steel grades
1.4818-AW properties
Typical room-temperature values for 1.4818-AW; 22 are specific to this condition. Other listed values are 1.4818 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4818-AW has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Mechanical15
1.4818-AW has a yield strength of 340 MPa (49.3 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 55% of stainless steel grades. Elongation at break is 35% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1.4818-AW is rated for continuous service to 1,000°C (1,832 °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
1.4818-AW 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 1.4818-AW takes about 55 MJ of energy and emits 5.5 kg of CO₂ — more than 50% of stainless steel grades. Typical recycled content is 60%.
Manufacturability7
1.4818-AW's machinability is poor (30/100, worse than 70% of stainless steel grades); weldability very good (80/100); formability fair (45/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4818-AW
Is 1.4818 easy to machine?
Machines like 304 but tougher and more gummy from Si+N — use rigid setups, positive-rake coated carbide, 60–100 m/min, heavy feed to cut under the work-hardened layer and flood coolant.
Can 1.4818 be welded?
Excellent weldability by GTAW/GMAW/SMAW without pre- or post-weld heat treatment; use matching, 22-12H or 253 MA type fillers, keep interpass below ~150 °C and heat input moderate to limit ferrite/σ issues.
Can 1.4818 be formed, bent or molded?
Cold forms and deep draws well but work-hardens faster than 304 — allow extra springback and interstage annealing at 1050–1100 °C; hot work at 1150–900 °C with rapid cooling.
What surface finishes work on 1.4818?
Pickle/passivate after hot work or welding to restore the Si-Cr oxide; no anodising — electropolishing or mechanical polishing for surface quality, and avoid carbon-steel contamination on grinding media.
1.4818 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 | 0.05 |
| Sikey oxidation-scale former | 1 – 2 | 1.4 |
| Mn | ≤ 0.8 | 0.6 |
| P | ≤ 0.05 | 0.03 |
| S | ≤ 0.02 | 0 |
| Cr | 18 – 19 | 18.5 |
| Ni | 9 – 11 | 9.5 |
| Nsolid-solution strengthening | 0.12 – 0.2 | 0.15 |
| Cerare-earth addition improving oxide-scale adhesion | 0.03 – 0.08 | 0.05 |
| Fe | balance | — |
1.4818-AW — frequently asked
What is 1.4818-AW used for?
1.4818-AW is typically used for furnace fittings, exhaust components and heat-treatment fixtures. In short: oxidation-resistant 18-10; service to 1050 °C; welds without heat treatment.
What is the yield strength of 1.4818-AW?
1.4818-AW has a typical yield strength of 340 MPa (49.3 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 55% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is 1.4818-AW easy to machine?
Not especially — machinability is rated poor (30/100, worse than 70% of stainless steel grades). Machines like 304 but tougher and more gummy from Si+N — use rigid setups, positive-rake coated carbide, 60–100 m/min, heavy feed to cut under the work-hardened layer and flood coolant.
Can 1.4818-AW be welded?
Yes — weldability is rated very good (80/100). Excellent weldability by GTAW/GMAW/SMAW without pre- or post-weld heat treatment; use matching, 22-12H or 253 MA type fillers, keep interpass below ~150 °C and heat input moderate to limit ferrite/σ issues.
What surface finishes work on 1.4818-AW?
Pickle/passivate after hot work or welding to restore the Si-Cr oxide; no anodising — electropolishing or mechanical polishing for surface quality, and avoid carbon-steel contamination on grinding media.
Can 1.4818-AW be formed, bent or molded?
Cold forms and deep draws well but work-hardens faster than 304 — allow extra springback and interstage annealing at 1050–1100 °C; hot work at 1150–900 °C with rapid cooling.
What is the maximum service temperature of 1.4818-AW?
1.4818-AW is rated for continuous use to about 1,000°C (1,832 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4818 Annealed and 1.4818-CD?
Annealed is the default condition — standard supply condition for all product forms — maximum ductility, fully austenitic, best oxidation and corrosion performance. CD: choose for tight tolerance, higher room-temperature strength and better chip control; strength gain is lost above ~600 °C by recovery. Yield strength is 330 MPa in Annealed versus 520 MPa in CD.
Sources
- EN 10095 — Heat resisting steels and nickel alloys — CEN (2018)
- EN 10088-1/-2 — Stainless steels: list of grades, sheet/plate technical delivery conditions — CEN (2014)
- Outokumpu 153 MA (EN 1.4818 / UNS S30415) data sheet — Outokumpu (2023)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- ASTM A240/A240M — Chromium and Chromium-Nickel Stainless Steel Plate, Sheet and Strip (S30415) — ASTM (2023)
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.