Steel ER80S-Ni2
UNS K21240
ER80S-Ni2 is a 2.25 % nickel alloyed low-alloy steel solid filler wire (UNS K21240) developed for low-temperature toughness in cryogenic and cold-service steel welds.
Reference datasheet — ER80S-Ni2 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the AW condition
ER80S-Ni2 tempers and conditions
ER80S-Ni2 is supplied in 2 conditions, soft to hard. AW is the default FabDigit quotes; the values on this page are for it.
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
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 | — |
Supply forms, finishes and certifications
Ways ER80S-Ni2 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
WIRE-CD | Cold-drawn, copper-coated spooled wire | Supply form |
GTAW-AW | TIG deposit, as welded | Surface finish |
What is ER80S-Ni2?
ER80S-Ni2 is a 2.25 % nickel alloyed low-alloy steel solid filler wire (UNS K21240) developed for low-temperature toughness in cryogenic and cold-service steel welds. The deposit typically gives 510 MPa yield, 600 MPa tensile, 27 % elongation and about 195 HB (92 HRB), with service to 400 °C; AW, PWHT, GTAW-AW and WIRE-CD conditions are on file. Toughness depends on discipline: interpass must stay at or below 150 °C, and the deposit has no inherent corrosion resistance so it must be blasted and coated. ER80S-Ni3 (3.25 % Ni) is the choice when impact requirements go colder still. ER80S-Ni2 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). ER80S-Ni2 has a yield strength of 510 MPa (74 ksi) and a tensile strength of 600 MPa (87 ksi) — stronger than 65% of steel grades. Elongation at break is 27% and the elastic modulus is 205 GPa (29.7 Msi).
What is ER80S-Ni2 used for?
- cryogenic storage tank welding
- low-temperature piping
- arctic structural steel welding
Advantages
- Tough — resists crack growth — 130 MPa·√m (118.3 ksi·√in), better than 89% of steel grades
- Readily welded — 88/100, better than 87% of steel grades
- Ductile — tolerates forming and impact — 27%, better than 86% 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 properties
Typical room-temperature values for ER80S-Ni2-AW; bars are the position among steel grades.
Physical3
ER80S-Ni2 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 has a yield strength of 510 MPa (74 ksi) and a tensile strength of 600 MPa (87 ksi) — stronger than 65% of steel grades. Elongation at break is 27% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
ER80S-Ni2 is rated for continuous service to 400°C (752 °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 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 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's machinability is good (55/100, better than 62% of steel grades); weldability excellent (88/100); formability good (55/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the steel family
Yield strength against density for every steel grade FabDigit runs. ER80S-Ni2 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with ER80S-Ni2
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.
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 |
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.
Surface treatments FabDigit runs on steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Organic Coating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Steel ER80S-Ni2 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- K21240
- Other
- ER55S-Ni2
How much does ER80S-Ni2 cost?
ER80S-Ni2 is a premium-cost steel ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
ER80S-Ni2 — frequently asked
What is ER80S-Ni2 used for?
ER80S-Ni2 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?
ER80S-Ni2 has a typical yield strength of 510 MPa (74 ksi) and a tensile strength of 600 MPa (87 ksi) — stronger than 65% of steel grades. Strength varies by condition: see the 2 listed tempers.
Is ER80S-Ni2 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 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?
No inherent corrosion resistance — blast, prime and paint or metallize; hardness should be held ≤250 HV for sour service.
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 is the maximum service temperature of ER80S-Ni2?
ER80S-Ni2 is rated for continuous use to about 400°C (752 °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.
How much does ER80S-Ni2 cost?
ER80S-Ni2 is a premium-cost steel ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
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; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.