Steel ER80S-Ni1
UNS K11260
ER80S-Ni1 is a 1 % nickel alloyed low-alloy steel solid filler wire (UNS K11260) used to weld structural and pressure vessel steels that need improved low-temperature toughness.
Reference datasheet — ER80S-Ni1 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-Ni1 tempers and conditions
ER80S-Ni1 is supplied in 3 conditions, soft to hard. AW is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Post-weld heat treated | Use for pressure vessels and thick sections requiring code stress relief; strength drops slightly while ductility and toughness improve. | 480 | 570 | 29 | 170 HB | — |
As Welded, TIG deposit | Choose for root passes and thin-wall pipe where the cleaner, lower-oxygen TIG deposit gives the best sub-zero toughness. | 505 | 600 | 29 | 180 HB | 7.8 % IACS |
AWDefault As-welded deposit | Standard as-deposited condition for MAG welding of 490–550 MPa low-alloy steel with low-temperature toughness requirements. | 520 | 610 | 27 | 190 HB | — |
What is ER80S-Ni1?
ER80S-Ni1 is a 1 % nickel alloyed low-alloy steel solid filler wire (UNS K11260) used to weld structural and pressure vessel steels that need improved low-temperature toughness. Typical deposit properties are 520 MPa yield, 610 MPa tensile, 27 % elongation and about 190 HB (92 HRB), with service to 400 °C and a machinability rating of 55; AW, AW-GTAW and PWHT conditions are on file. Corrosion behaviour matches the parent carbon steel, so coating is required, and heat input must stay controlled to protect notch toughness. ER80S-Ni2 and Ni3 give higher nickel and better cold-service impact values. ER80S-Ni1 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,460°C (2,660 °F). ER80S-Ni1 has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 610 MPa (88.5 ksi) — stronger than 67% of steel grades. Elongation at break is 27% and the elastic modulus is 205 GPa (29.7 Msi).
What is ER80S-Ni1 used for?
- low temperature service steel welding
- pressure vessel fabrication
- offshore structural steel
Advantages
- Readily welded — 92/100, better than 93% of steel grades
- Ductile — tolerates forming and impact — 27%, better than 86% of steel grades
ER80S-Ni1 properties
Typical room-temperature values for ER80S-Ni1-AW; bars are the position among steel grades.
Physical3
ER80S-Ni1 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,460°C (2,660 °F).
Mechanical15
ER80S-Ni1 has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 610 MPa (88.5 ksi) — stronger than 67% of steel grades. Elongation at break is 27% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
ER80S-Ni1 is rated for continuous service to 400°C (752 °F). It conducts heat at 42 W/m·K (24.3 BTU/hr·ft·°F), worse than 56% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
ER80S-Ni1 conducts electricity at 7.8 % IACS, worse than 57% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (14/100), better than 70% of steel grades.
Sustainability4
Producing a kilogram of ER80S-Ni1 takes about 32 MJ of energy and emits 2.4 kg of CO₂ — more than 70% of steel grades. Typical recycled content is 30%.
Manufacturability7
ER80S-Ni1's machinability is good (55/100, better than 62% of steel grades); weldability excellent (92/100); formability good (60/100).
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-Ni1 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with ER80S-Ni1
Is ER80S-Ni1 easy to machine?
Deposits machine like normalised low-alloy steel; use sharp carbide, expect work hardening at bead crowns and dress out slag/oxide before finish cuts.
Can ER80S-Ni1 be welded?
Designed as filler: MAG with Ar+15–25 % CO₂ (or 100 % Ar for TIG); keep heat input ~1.0–2.5 kJ/mm, preheat 100–150 °C on thick or restrained joints and limit interpass to ~250 °C to protect low-temperature toughness.
Can ER80S-Ni1 be formed, bent or molded?
Supplied as copper-coated drawn wire on layer-wound spools; maintain smooth liner and correct drive-roll pressure to avoid coating flake and feed problems.
ER80S-Ni1 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 enhancer | 0.8 – 1.1 | 0.95 |
| Cr | ≤ 0.15 | 0.05 |
| Mo | ≤ 0.35 | 0.05 |
| V | ≤ 0.05 | 0.01 |
| Cuincluding copper coating | ≤ 0.35 | 0.2 |
| P | ≤ 0.03 | 0.01 |
| S | ≤ 0.03 | 0.01 |
| Fe | balance |
What surface finishes work on ER80S-Ni1?
Not anodisable — grind/blast to remove silicate islands and mill scale, then paint, metallise or zinc-coat; weld metal rusts at nearly the same rate as the parent carbon steel.
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-Ni1 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- K11260
- Other
- ER55S-Ni1
How much does ER80S-Ni1 cost?
ER80S-Ni1 is a standard-cost steel ($$), cheaper than about 71% 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-Ni1 — frequently asked
What is ER80S-Ni1 used for?
ER80S-Ni1 is typically used for low temperature service steel welding, pressure vessel fabrication and offshore structural steel. In short: 1 % Ni for cold-service toughness; ductile 27 % elongation deposit; entry point of the Ni-series wires.
What is the yield strength of ER80S-Ni1?
ER80S-Ni1 has a typical yield strength of 520 MPa (75.4 ksi) and a tensile strength of 610 MPa (88.5 ksi) — stronger than 67% of steel grades. Strength varies by condition: see the 3 listed tempers.
Is ER80S-Ni1 easy to machine?
Reasonably — machinability is rated good (55/100, better than 62% of steel grades). Deposits machine like normalised low-alloy steel; use sharp carbide, expect work hardening at bead crowns and dress out slag/oxide before finish cuts.
Can ER80S-Ni1 be welded?
Yes — weldability is rated excellent (92/100). Designed as filler: MAG with Ar+15–25 % CO₂ (or 100 % Ar for TIG); keep heat input ~1.0–2.5 kJ/mm, preheat 100–150 °C on thick or restrained joints and limit interpass to ~250 °C to protect low-temperature toughness.
What surface finishes work on ER80S-Ni1?
Not anodisable — grind/blast to remove silicate islands and mill scale, then paint, metallise or zinc-coat; weld metal rusts at nearly the same rate as the parent carbon steel.
Can ER80S-Ni1 be formed, bent or molded?
Supplied as copper-coated drawn wire on layer-wound spools; maintain smooth liner and correct drive-roll pressure to avoid coating flake and feed problems.
What is the maximum service temperature of ER80S-Ni1?
ER80S-Ni1 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-Ni1-AW and ER80S-Ni1 PWHT?
AW is the default condition — standard as-deposited condition for MAG welding of 490–550 MPa low-alloy steel with low-temperature toughness requirements. PWHT: use for pressure vessels and thick sections requiring code stress relief; strength drops slightly while ductility and toughness improve. Yield strength is 520 MPa in AW versus 480 MPa in PWHT.
How much does ER80S-Ni1 cost?
ER80S-Ni1 is a standard-cost steel ($$), cheaper than about 71% 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 and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- Solid wire ER80S-Ni1 / SG Ni1 datasheets (Lincoln Electric, ESAB, Böhler Welding, / ) — various welding consumable producers (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.