Steel ER80S-Ni2 PWHT
Heat-treated state
UNS K21240
PWHT = post-weld heat treated
Choose for thick-section pressure vessels or code work requiring PWHT; strength drops slightly, low-temperature toughness and ductility improve.
Values for the PWHT condition
Other ER80S-Ni2 tempers and conditions
ER80S-Ni2 is listed in 2 conditions; see the grade overview at ER80S-Ni2.
- 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 for thick-section pressure vessels or code work requiring PWHT; strength drops slightly, low-temperature toughness and ductility improve. | 480 | 570 | 29 | 180 HB | — |
AWDefault As-welded deposit | Standard supply/qualification condition: deposit tested as welded, best combination of 550 MPa-class strength and −73 °C toughness. | 510 | 600 | 27 | 195 HB | — |
What is ER80S-Ni2 PWHT?
ER80S-Ni2 PWHT is ER80S-Ni2 heat treated to PWHT — choose for thick-section pressure vessels or code work requiring PWHT; strength drops slightly, low-temperature toughness and ductility improve. ER80S-Ni2 PWHT has a yield strength of 480 MPa (69.6 ksi) and a tensile strength of 570 MPa (82.7 ksi) — stronger than 59% of steel grades. Elongation at break is 29% and the elastic modulus is 205 GPa (29.7 Msi). ER80S-Ni2 PWHT has a density of 7.8 g/cm³ (0.282 lb/in³), lighter than 87% of steel grades. It melts at 1,460°C (2,660 °F). AW is the default condition FabDigit quotes; PWHT is available on request or by drawing note.
Advantages
- Tough — resists crack growth — 150 MPa·√m (136.5 ksi·√in), better than 96% of steel grades
- Ductile — tolerates forming and impact — 29%, better than 91% of steel grades
- Readily welded — 88/100, better than 87% of steel grades
Limitations
- High embodied carbon — 2.6 kg CO₂/kg, worse than 87% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
ER80S-Ni2 PWHT properties
Typical room-temperature values for ER80S-Ni2 PWHT; 11 are specific to this condition. Other listed values are ER80S-Ni2 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
ER80S-Ni2 PWHT has a density of 7.8 g/cm³ (0.282 lb/in³), lighter than 87% of steel grades. It melts at 1,460°C (2,660 °F).
Mechanical15
ER80S-Ni2 PWHT has a yield strength of 480 MPa (69.6 ksi) and a tensile strength of 570 MPa (82.7 ksi) — stronger than 59% of steel grades. Elongation at break is 29% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
ER80S-Ni2 PWHT is rated for continuous service to 425°C (797 °F). It conducts heat at 39 W/m·K (22.5 BTU/hr·ft·°F), worse than 67% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical2
ER80S-Ni2 PWHT has an electrical resistivity of 2.4×10⁻⁷ Ω·m.
Chemical & Environmental3
Corrosion resistance is not recommended (13/100), better than 66% of steel grades.
Sustainability4
Producing a kilogram of ER80S-Ni2 PWHT takes about 34 MJ of energy and emits 2.6 kg of CO₂ — more than 82% of steel grades. Typical recycled content is 25%.
Manufacturability7
ER80S-Ni2 PWHT's machinability is good (55/100, better than 62% of steel grades); weldability excellent (88/100); formability good (55/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with ER80S-Ni2 PWHT
Is ER80S-Ni2 easy to machine?
Deposit machines like a normalized 550 MPa low-alloy steel — carbide tooling, moderate speeds; expect slightly gummy chips from the Ni content.
Can ER80S-Ni2 be welded?
GMAW with Ar+(5–25 %) CO₂ or GTAW with pure Ar; keep interpass ≤150 °C and heat input moderate to preserve −73 °C toughness, and use low-hydrogen practice on thick or restrained joints.
Can ER80S-Ni2 be formed, bent or molded?
Supplied as cold-drawn copper-coated wire; keep spools dry and clean feed liners since Ni-alloy wire is sensitive to arc instability from surface contamination.
What surface finishes work on ER80S-Ni2?
No inherent corrosion resistance — blast, prime and paint or metallize; hardness should be held ≤250 HV for sour service.
ER80S-Ni2 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 |
|---|---|---|
| CAWS A5.28 max | ≤ 0.12 | 0.08 |
| Mn | ≤ 1.25 | 1.1 |
| Si | 0.4 – 0.8 | 0.6 |
| Nitoughness-controlling element | 2 – 2.75 | 2.3 |
| Cr | ≤ 0.15 | 0.05 |
| Mo | ≤ 0.35 | 0.05 |
| V | ≤ 0.05 | 0.01 |
| Cuincludes copper coating | ≤ 0.35 | 0.2 |
| P | ≤ 0.03 | 0.01 |
| S | ≤ 0.03 | 0.01 |
| Fe | balance | — |
ER80S-Ni2 PWHT — frequently asked
What is ER80S-Ni2 PWHT used for?
ER80S-Ni2 PWHT is typically used for cryogenic storage tank welding, low-temperature piping and arctic structural steel welding. In short: 2.25 % Ni cold-service filler; toughness to −73 °C; tight interpass control needed.
What is the yield strength of ER80S-Ni2 PWHT?
ER80S-Ni2 PWHT has a typical yield strength of 480 MPa (69.6 ksi) and a tensile strength of 570 MPa (82.7 ksi) — stronger than 59% of steel grades. Strength varies by condition: see the 2 listed tempers.
Is ER80S-Ni2 PWHT easy to machine?
Reasonably — machinability is rated good (55/100, better than 62% of steel grades). Deposit machines like a normalized 550 MPa low-alloy steel — carbide tooling, moderate speeds; expect slightly gummy chips from the Ni content.
Can ER80S-Ni2 PWHT be welded?
Yes — weldability is rated excellent (88/100). GMAW with Ar+(5–25 %) CO₂ or GTAW with pure Ar; keep interpass ≤150 °C and heat input moderate to preserve −73 °C toughness, and use low-hydrogen practice on thick or restrained joints.
What surface finishes work on ER80S-Ni2 PWHT?
No inherent corrosion resistance — blast, prime and paint or metallize; hardness should be held ≤250 HV for sour service.
Can ER80S-Ni2 PWHT be formed, bent or molded?
Supplied as cold-drawn copper-coated wire; keep spools dry and clean feed liners since Ni-alloy wire is sensitive to arc instability from surface contamination.
What is the maximum service temperature of ER80S-Ni2 PWHT?
ER80S-Ni2 PWHT is rated for continuous use to about 425°C (797 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between ER80S-Ni2-AW and ER80S-Ni2 PWHT?
AW is the default condition — standard supply/qualification condition: deposit tested as welded, best combination of 550 MPa-class strength and −73 °C toughness. PWHT: choose for thick-section pressure vessels or code work requiring PWHT; strength drops slightly, low-temperature toughness and ductility improve. Yield strength is 510 MPa in AW versus 480 MPa in PWHT.
Sources
- AWS A5.28/A5.28M — Low-Alloy Steel Electrodes and Rods for Gas Shielded Arc Welding — American Welding Society (2020)
- ASM Handbook Vol.6 — Welding, Brazing and Soldering — ASM International (1993)
- ASM Handbook Vol.1 — Properties of Irons and Steels — ASM International (1990)
- Solid wire ER80S-Ni2 / ER55S-Ni2 all-weld-metal data — Lincoln Electric / ESAB / Böhler Welding (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.