Stainless Steel 1.4887-AW (As-welded deposit)
Heat-treated state
EN 1.4887
Property set for weld repairs and tube-to-tube joints made with matching Nb-bearing 35/22 filler, used without PWHT.
Values for the AW condition
Other 1.4887 tempers and conditions
1.4887 is listed in 5 conditions; see the grade overview at 1.4887.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As-Cast, statically (sand/investment) cast | For furnace rolls, trays, burner parts and fittings where section geometry rules out centrifugal casting. | 230 | 450 | 10 | 180 HB | 1.7 % IACS |
As-Cast, centrifugally cast tube | Pick for reformer/cracking furnace tubes and radiant tubes — columnar as-cast structure gives the best creep-rupture life. | 240 | 480 | 12 | 185 HB | 1.7 % IACS |
SADefault Solution Annealed | Standard wrought delivery condition — best ductility and toughness for formed and welded furnace parts. | 250 | 560 | 35 | 170 HB | 1.7 % IACS |
AWThis page As-welded deposit | Property set for weld repairs and tube-to-tube joints made with matching Nb-bearing 35/22 filler, used without PWHT. | 260 | 470 | 15 | 180 HB | 1.7 % IACS |
Cold drawn | Use where close tolerance and higher room-temperature strength are needed; strength advantage disappears above ~600 °C. | 420 | 680 | 20 | 18 HRC | 1.7 % IACS |
What is 1.4887-AW?
1.4887-AW is 1.4887 heat treated to AW — property set for weld repairs and tube-to-tube joints made with matching Nb-bearing 35/22 filler, used without PWHT. 1.4887-AW has a yield strength of 260 MPa (37.7 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 84% of stainless steel grades. Elongation at break is 15% and the elastic modulus is 190 GPa (27.6 Msi). 1.4887-AW has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,340°C (2,444 °F). SA is the default condition FabDigit quotes; AW is available on request or by drawing note.
Advantages
- High service temperature — 1,050°C (1,922 °F), better than 91% of stainless steel grades
Limitations
- Difficult to machine — 22/100, worse than 95% of stainless steel grades
- Low electrical conductivity — 1.7 % IACS, worse than 93% of stainless steel grades
- Limited ductility — 15%, worse than 89% of stainless steel grades
- High embodied carbon — 6 kg CO₂/kg, worse than 88% of stainless steel grades
- Poor heat conductor — 13 W/m·K (7.51 BTU/hr·ft·°F), worse than 85% of stainless steel grades
1.4887-AW properties
Typical room-temperature values for 1.4887-AW; 22 are specific to this condition. Other listed values are 1.4887 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4887-AW has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,340°C (2,444 °F).
Mechanical14
1.4887-AW has a yield strength of 260 MPa (37.7 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 84% of stainless steel grades. Elongation at break is 15% and the elastic modulus is 190 GPa (27.6 Msi).
Thermal5
1.4887-AW is rated for continuous service to 1,050°C (1,922 °F). It conducts heat at 13 W/m·K (7.51 BTU/hr·ft·°F), worse than 85% of stainless steel grades. Thermal expansion is 15.5 µm/m·K (8.61 µin/in·°F).
Electrical3
1.4887-AW conducts electricity at 1.7 % IACS, worse than 93% of stainless steel grades.
Chemical & Environmental2
Corrosion resistance is fair (48/100), worse than 80% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4887-AW takes about 72 MJ of energy and emits 6 kg of CO₂ — more than 83% of stainless steel grades. Typical recycled content is 45%.
Manufacturability7
1.4887-AW's machinability is poor (22/100, worse than 95% of stainless steel grades); weldability good (55/100); formability poor (25/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4887-AW
Is 1.4887 easy to machine?
Gummy, work-hardening and abrasive from Nb carbides — use rigid setups, positive-rake carbide or ceramic inserts, low speed with heavy positive feed, flood coolant, and never dwell in the cut.
Can 1.4887 be welded?
Weld with matching Nb-bearing 35/22 filler (GTAW/SMAW), low heat input, no preheat needed on wrought; high-carbon cast sections need buttering/careful restraint control to avoid hot cracking.
Can 1.4887 be formed, bent or molded?
Wrought product cold-forms like a 310-type austenitic but with higher forces and springback; cast product is not formable — hot work 1100–1180 °C and re-solution anneal ~1100 °C with rapid cooling.
What surface finishes work on 1.4887?
Grind/pickle in HNO3-HF to remove the tenacious Cr-Si scale after hot work or welding; polishes to a satin finish, no anodizing, and a self-healing chromia/silica scale forms in service.
1.4887 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 |
|---|---|---|
| Chigher (0.35–0.45) in the cast GX40 variant | 0.05 – 0.15 | 0.1 |
| Siraises oxidation/carburization resistance | 1 – 2 | 1.5 |
| Mn | ≤ 2 | 1 |
| P | ≤ 0.03 | — |
| S | ≤ 0.02 | — |
| Cr | 20 – 23 | 21.5 |
| Ni | 33 – 37 | 35 |
| Nbstabilizer, boosts creep-rupture strength | 0.6 – 1.4 | 1 |
| Fe | balance | — |
1.4887-AW — frequently asked
What is 1.4887-AW used for?
1.4887-AW is typically used for radiant tubes, furnace fittings and petrochemical cracking components. In short: 1100 °C service capability; carburization-resistant cast alloy; nb-stabilized 35/22 chemistry.
What is the yield strength of 1.4887-AW?
1.4887-AW has a typical yield strength of 260 MPa (37.7 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 84% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is 1.4887-AW easy to machine?
Not especially — machinability is rated poor (22/100, worse than 95% of stainless steel grades). Gummy, work-hardening and abrasive from Nb carbides — use rigid setups, positive-rake carbide or ceramic inserts, low speed with heavy positive feed, flood coolant, and never dwell in the cut.
Can 1.4887-AW be welded?
Yes — weldability is rated good (55/100). Weld with matching Nb-bearing 35/22 filler (GTAW/SMAW), low heat input, no preheat needed on wrought; high-carbon cast sections need buttering/careful restraint control to avoid hot cracking.
What surface finishes work on 1.4887-AW?
Grind/pickle in HNO3-HF to remove the tenacious Cr-Si scale after hot work or welding; polishes to a satin finish, no anodizing, and a self-healing chromia/silica scale forms in service.
Can 1.4887-AW be formed, bent or molded?
Wrought product cold-forms like a 310-type austenitic but with higher forces and springback; cast product is not formable — hot work 1100–1180 °C and re-solution anneal ~1100 °C with rapid cooling.
What is the maximum service temperature of 1.4887-AW?
1.4887-AW is rated for continuous use to about 1,050°C (1,922 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4887-SA and 1.4887-CD?
SA is the default condition — standard wrought delivery condition — best ductility and toughness for formed and welded furnace parts. CD: use where close tolerance and higher room-temperature strength are needed; strength advantage disappears above ~600 °C. Yield strength is 250 MPa in SA versus 420 MPa in CD.
Sources
- EN 10095 — Heat resisting steels and nickel alloys — CEN (2018)
- EN 10295 — Heat resistant steel castings — CEN (2002)
- 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)
- Heat-resistant Fe-Ni-Cr cast tube alloy datasheets (HP/HT-Nb class) — Various foundries (2023)
- SMM nickel & heat-resistant alloy price indications — SMM (2025)
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.