Nickel Alloy Alloy 59-AW (As-welded deposit)
Heat-treated state
UNS N06059 · EN 2.4605, NiCr23Mo16Al · also Hastelloy 59
Matching filler / weld deposit properties for joint design; used as-welded without post-weld heat treatment in almost all corrosion service.
Values for the AW condition
Other Alloy 59 tempers and conditions
Alloy 59 is listed in 5 conditions; see the grade overview at Alloy 59.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Hot finished then solution annealed | Choose for thick plate, forgings and heavy bar where hot working precedes the anneal; slightly lower strength and coarser grain than thin cold-rolled product. | 340 | 715 | 50 | 190 HB | 1.3 % IACS |
SADefault Solution annealed | Standard supply condition for sheet, plate, bar, pipe and fittings; maximum corrosion resistance and ductility. | 360 | 740 | 50 | 200 HB | — |
Cold rolled and bright annealed sheet/strip | Thin sheet and strip for lining, bellows and formed parts; fine grain, bright surface, best formability and weld appearance. | 380 | 760 | 48 | 210 HB | 1.3 % IACS |
AWThis page As-welded deposit | Matching filler / weld deposit properties for joint design; used as-welded without post-weld heat treatment in almost all corrosion service. | 460 | 720 | 38 | 215 HB | 1.3 % IACS |
Cold drawn | Use where higher strength and tighter tolerances are needed (fasteners, shafts, instrument tubing); corrosion resistance retained but ductility and formability drop. | 750 | 950 | 22 | 30 HRC | — |
What is Alloy 59-AW?
Alloy 59-AW is Alloy 59 heat treated to AW — matching filler / weld deposit properties for joint design; used as-welded without post-weld heat treatment in almost all corrosion service. Alloy 59-AW has a yield strength of 460 MPa (66.7 ksi) and a tensile strength of 720 MPa (104 ksi) — stronger than 67% of nickel alloy grades. Elongation at break is 38% and the elastic modulus is 208 GPa (30.2 Msi). Alloy 59-AW has a density of 8.6 g/cm³ (0.311 lb/in³), heavier than 67% of nickel alloy grades. It melts at 1,310°C (2,390 °F). SA is the default condition FabDigit quotes; AW is available on request or by drawing note.
Advantages
- Polishes to a fine finish — 80/100, better than 97% of nickel alloy grades
- Good corrosion resistance — 92/100, better than 91% of nickel alloy grades
- Readily welded — 85/100, better than 83% of nickel alloy grades
- High service temperature — 1,000°C (1,832 °F), better than 79% of nickel alloy grades
Alloy 59-AW properties
Typical room-temperature values for Alloy 59-AW; 21 are specific to this condition. Other listed values are Alloy 59 reference data and may not represent this condition. Bars are the position among nickel alloy grades.
Physical3
Alloy 59-AW has a density of 8.6 g/cm³ (0.311 lb/in³), heavier than 67% of nickel alloy grades. It melts at 1,310°C (2,390 °F).
Mechanical15
Alloy 59-AW has a yield strength of 460 MPa (66.7 ksi) and a tensile strength of 720 MPa (104 ksi) — stronger than 67% of nickel alloy grades. Elongation at break is 38% and the elastic modulus is 208 GPa (30.2 Msi).
Thermal6
Alloy 59-AW is rated for continuous service to 1,000°C (1,832 °F). It conducts heat at 10.2 W/m·K (5.89 BTU/hr·ft·°F), worse than 79% of nickel alloy grades. Thermal expansion is 12.4 µm/m·K (6.89 µin/in·°F).
Electrical3
Alloy 59-AW conducts electricity at 1.3 % IACS, worse than 89% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is excellent (92/100), better than 91% of nickel alloy grades.
Sustainability4
Producing a kilogram of Alloy 59-AW takes about 180 MJ of energy and emits 14 kg of CO₂ — more than 69% of nickel alloy grades. Typical recycled content is 40%.
Manufacturability7
Alloy 59-AW's machinability is poor (15/100, worse than 76% of nickel alloy grades); weldability excellent (85/100); formability fair (45/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Alloy 59-AW
Is Alloy 59 easy to machine?
Machine like a gummy austenitic superalloy: rigid setup, positive-rake sharp carbide, low speed with heavy feed, generous flood coolant, and never dwell - the alloy work hardens fast and glazes the cut.
Can Alloy 59 be welded?
Readily welded by GTAW/GMAW/PAW autogenously or with matching ERNiCrMo-13 filler, no preheat and no PWHT; keep heat input and interpass temperature low and clean oxides between passes.
Can Alloy 59 be formed, bent or molded?
Very ductile but strongly work hardening - allow extra power/springback in bending and deep drawing, and interstage anneal at ~1100 °C with rapid cooling for severe forming.
What surface finishes work on Alloy 59?
Pickle and passivate or electropolish after hot working/welding to restore the passive film; not anodizable, takes a bright mechanical polish for hygienic surfaces.
Alloy 59 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 |
|---|---|---|
| Cr | 22 – 24 | 23 |
| Mo | 15 – 16.5 | 16 |
| Aldeoxidiser, improves structural stability | 0.1 – 0.4 | 0.25 |
| Fe | ≤ 1.5 | 0.5 |
| Cvery low C for intergranular corrosion resistance | ≤ 0.01 | 0.01 |
| Si | ≤ 0.1 | 0.03 |
| Mn | ≤ 0.5 | 0.2 |
| Co | ≤ 0.3 | 0.1 |
| Cu | ≤ 0.5 | 0.05 |
| Ti | ≤ 0.1 | — |
| P | ≤ 0.02 | — |
| S | ≤ 0.01 | — |
| Nibalance, typically ≥59 % | ≥ 59 (balance) | — |
Alloy 59-AW — frequently asked
What is Alloy 59-AW used for?
Alloy 59-AW is typically used for flue gas desulfurization, seawater equipment and chemical process vessels. In short: top pitting resistance of family; excellent weldability for Ni-Mo-Cr; hardest of the group to machine.
What is the yield strength of Alloy 59-AW?
Alloy 59-AW has a typical yield strength of 460 MPa (66.7 ksi) and a tensile strength of 720 MPa (104 ksi) — stronger than 67% of nickel alloy grades. Strength varies by condition: see the 5 listed tempers.
Is Alloy 59-AW easy to machine?
Not especially — machinability is rated poor (15/100, worse than 76% of nickel alloy grades). Machine like a gummy austenitic superalloy: rigid setup, positive-rake sharp carbide, low speed with heavy feed, generous flood coolant, and never dwell - the alloy work hardens fast and glazes the cut.
Can Alloy 59-AW be welded?
Yes — weldability is rated excellent (85/100). Readily welded by GTAW/GMAW/PAW autogenously or with matching ERNiCrMo-13 filler, no preheat and no PWHT; keep heat input and interpass temperature low and clean oxides between passes.
What surface finishes work on Alloy 59-AW?
Pickle and passivate or electropolish after hot working/welding to restore the passive film; not anodizable, takes a bright mechanical polish for hygienic surfaces.
Can Alloy 59-AW be formed, bent or molded?
Very ductile but strongly work hardening - allow extra power/springback in bending and deep drawing, and interstage anneal at ~1100 °C with rapid cooling for severe forming.
What is the maximum service temperature of Alloy 59-AW?
Alloy 59-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 Alloy 59-SA and Alloy 59-CD?
SA is the default condition — standard supply condition for sheet, plate, bar, pipe and fittings; maximum corrosion resistance and ductility. CD: use where higher strength and tighter tolerances are needed (fasteners, shafts, instrument tubing); corrosion resistance retained but ductility and formability drop. Yield strength is 360 MPa in SA versus 750 MPa in CD.
Sources
- ASTM B575 - Ni-Cr-Mo alloy plate, sheet and strip (UNS N06059) — ASTM International (2023)
- ASTM B574 - Ni-Cr-Mo alloy rod and bar — ASTM International (2023)
- ASTM B622 / B619 - seamless and welded Ni-alloy pipe and tube — ASTM International (2022)
- DIN EN 10088 / VdTÜV-Werkstoffblatt for 2.4605 NiCr23Mo16Al — DIN / VdTÜV (2018)
- VDM Alloy 59 (Nicrofer 5923 hMo) material data sheet — VDM Metals (2021)
- ASM Handbook Vol. 2 - Properties of Nonferrous Alloys (Ni-Cr-Mo corrosion alloys) — ASM International (1990)
- GB/T 15007 / GB/T 15062 — (SAC) (2017)
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.