Nickel Alloy ENiCrFe-1 PWHT
Heat-treated state
UNS W86132
PWHT = post-weld heat treated
Choose when the joint must follow a code-mandated PWHT of the ferritic base metal or requires residual-stress reduction; ductility rises slightly, strength drops marginally.
Values for the PWHT condition
Other ENiCrFe-1 tempers and conditions
ENiCrFe-1 is listed in 2 conditions; see the grade overview at ENiCrFe-1.
- PWHT
- AW
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
PWHTThis page Post-weld heat treated | Choose when the joint must follow a code-mandated PWHT of the ferritic base metal or requires residual-stress reduction; ductility rises slightly, strength drops marginally. | 360 | 600 | 40 | 175 HB | 1.5 % IACS |
AWDefault As-welded deposit | Standard supplied/qualified condition: properties of the as-deposited all-weld-metal per AWS A5.11 test assembly. | 380 | 620 | 38 | 185 HB | — |
What is ENiCrFe-1 PWHT?
ENiCrFe-1 PWHT is ENiCrFe-1 heat treated to PWHT — choose when the joint must follow a code-mandated PWHT of the ferritic base metal or requires residual-stress reduction; ductility rises slightly, strength drops marginally. ENiCrFe-1 PWHT has a yield strength of 360 MPa (52.2 ksi) and a tensile strength of 600 MPa (87 ksi) — weaker than 57% of nickel alloy grades. Elongation at break is 40% and the elastic modulus is 207 GPa (30 Msi). ENiCrFe-1 PWHT has a density of 8.4 g/cm³ (0.303 lb/in³), heavier than 57% of nickel alloy grades. It melts at 1,330°C (2,426 °F). AW is the default condition FabDigit quotes; PWHT is available on request or by drawing note.
Limitations
- Hard to polish — 60/100, worse than 84% of nickel alloy grades
ENiCrFe-1 PWHT properties
Typical room-temperature values for ENiCrFe-1 PWHT; 22 are specific to this condition. Other listed values are ENiCrFe-1 reference data and may not represent this condition. Bars are the position among nickel alloy grades.
Physical3
ENiCrFe-1 PWHT has a density of 8.4 g/cm³ (0.303 lb/in³), heavier than 57% of nickel alloy grades. It melts at 1,330°C (2,426 °F).
Mechanical14
ENiCrFe-1 PWHT has a yield strength of 360 MPa (52.2 ksi) and a tensile strength of 600 MPa (87 ksi) — weaker than 57% of nickel alloy grades. Elongation at break is 40% and the elastic modulus is 207 GPa (30 Msi).
Thermal6
ENiCrFe-1 PWHT is rated for continuous service to 815°C (1,499 °F). It conducts heat at 12.8 W/m·K (7.4 BTU/hr·ft·°F), better than 70% of nickel alloy grades. Thermal expansion is 13.7 µm/m·K (7.61 µin/in·°F).
Electrical3
ENiCrFe-1 PWHT conducts electricity at 1.5 % IACS, better than 59% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (74/100), worse than 66% of nickel alloy grades.
Sustainability4
Producing a kilogram of ENiCrFe-1 PWHT takes about 150 MJ of energy and emits 13 kg of CO₂ — less than 68% of nickel alloy grades. Typical recycled content is 30%.
Manufacturability7
ENiCrFe-1 PWHT's machinability is poor (27/100, better than 80% of nickel alloy grades); weldability very good (78/100); formability fair (42/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with ENiCrFe-1 PWHT
Is ENiCrFe-1 easy to machine?
Weld deposit machines like Alloy 600 — low speeds, positive rake carbide, heavy rigid setups and continuous feed to avoid work-hardened glazing; grinding is often preferred for weld dressing.
Can ENiCrFe-1 be welded?
SMAW with DCEP, short arc, stringer or slight weave (≤3× core dia.), low heat input and interpass ≤150 °C; keep electrodes dry (re-bake ~300 °C) and remove slag fully between passes as ENiCrFe-1 slag releases less freely than ENiCrFe-3.
Can ENiCrFe-1 be formed, bent or molded?
Not a wrought product; deposited metal is ductile (≈38 % elongation) and tolerates cold straightening/peening of weldments but work-hardens rapidly.
What surface finishes work on ENiCrFe-1?
Pickle or mechanically clean weld to remove oxide/slag before service; not anodisable — passivate or electropolish for high-purity and nuclear cleanliness requirements.
ENiCrFe-1 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 | 13 – 17 | 15 |
| Fe | ≤ 11 | 8 |
| Nb+Tacolumbium plus tantalum, stabiliser | 1.5 – 4 | 2.2 |
| Mn | ≤ 3.5 | 2 |
| Ti | ≤ 1 | 0.3 |
| Si | ≤ 0.75 | 0.4 |
| C | ≤ 0.08 | 0.04 |
| Cu | ≤ 0.5 | 0.05 |
| P | ≤ 0.03 | 0.01 |
| S | ≤ 0.02 | 0.01 |
| Coonly when specified (nuclear applications) | ≤ 0.12 | 0.05 |
| Other, total | ≤ 0.5 | — |
| NiNi + Co, 62 % min per AWS A5.11 | ≥ 62 (balance) | — |
ENiCrFe-1 PWHT — frequently asked
What is ENiCrFe-1 PWHT used for?
ENiCrFe-1 PWHT is typically used for alloy 600 vessel repair, high-temperature furnace component welding and legacy nuclear component maintenance. In short: legacy Alloy 600 electrode; 815 °C service deposit; superseded by ENiCrFe-3.
What is the yield strength of ENiCrFe-1 PWHT?
ENiCrFe-1 PWHT has a typical yield strength of 360 MPa (52.2 ksi) and a tensile strength of 600 MPa (87 ksi) — weaker than 57% of nickel alloy grades. Strength varies by condition: see the 2 listed tempers.
Is ENiCrFe-1 PWHT easy to machine?
Not especially — machinability is rated poor (27/100, better than 80% of nickel alloy grades). Weld deposit machines like Alloy 600 — low speeds, positive rake carbide, heavy rigid setups and continuous feed to avoid work-hardened glazing; grinding is often preferred for weld dressing.
Can ENiCrFe-1 PWHT be welded?
Yes — weldability is rated very good (78/100). SMAW with DCEP, short arc, stringer or slight weave (≤3× core dia.), low heat input and interpass ≤150 °C; keep electrodes dry (re-bake ~300 °C) and remove slag fully between passes as ENiCrFe-1 slag releases less freely than ENiCrFe-3.
What surface finishes work on ENiCrFe-1 PWHT?
Pickle or mechanically clean weld to remove oxide/slag before service; not anodisable — passivate or electropolish for high-purity and nuclear cleanliness requirements.
Can ENiCrFe-1 PWHT be formed, bent or molded?
Not a wrought product; deposited metal is ductile (≈38 % elongation) and tolerates cold straightening/peening of weldments but work-hardens rapidly.
What is the maximum service temperature of ENiCrFe-1 PWHT?
ENiCrFe-1 PWHT is rated for continuous use to about 815°C (1,499 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between ENiCrFe-1-AW and ENiCrFe-1 PWHT?
AW is the default condition — standard supplied/qualified condition: properties of the as-deposited all-weld-metal per AWS A5.11 test assembly. PWHT: choose when the joint must follow a code-mandated PWHT of the ferritic base metal or requires residual-stress reduction; ductility rises slightly, strength drops marginally. Yield strength is 380 MPa in AW versus 360 MPa in PWHT.
Sources
- AWS A5.11/A5.11M — Specification for Nickel and Nickel-Alloy Welding Electrodes for Shielded Metal Arc Welding — American Welding Society (2018)
- ASME BPVC Section II Part C, SFA-5.11 — ASME (2023)
- ASM Handbook Vol.6 — Welding, Brazing and Soldering (Ni-alloy filler metals) — ASM International (1993)
- INCONEL alloy 600 physical & mechanical property data — Special Metals Corporation (2008)
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.