Steel E80C-Ni3 AW-M21
Finish state
UNS W23030
AW-M21 = as welded, 75-80%Ar / balance CO₂ shielding
Choose 75–80 % Ar / balance CO₂ shielding when best low-temperature impact values and minimum spatter are required; as welded it gives 530 MPa yield and 630 MPa tensile.
Values for the AW-M21 condition
Other E80C-Ni3 tempers and conditions
E80C-Ni3 is listed in 4 conditions; see the grade overview at E80C-Ni3.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Post-weld heat treated | Use these values when ASME requires stress relief near 605 °C for 1 h with furnace cooling on pressure vessels or thick-wall joints; strength falls and elongation rises to 29 %. | 490 | 590 | 29 | 175 HB | — |
As welded, 100 % CO₂ shielding | Pick 100 % CO₂ shielding for field work where cost leads and −60 °C class toughness is enough; as-welded strength drops slightly to 500 MPa yield and 605 MPa tensile. | 500 | 605 | 25 | 188 HB | 6.2 % IACS |
AWDefault As-welded deposit | Use the as-welded, all-weld-metal condition as delivered for routine low-temperature structural joints where no post-weld heat treatment is specified. | 515 | 620 | 26 | 190 HB | — |
AW-M21This page As welded, 75-80%Ar / balance CO₂ shielding | Choose 75–80 % Ar / balance CO₂ shielding when best low-temperature impact values and minimum spatter are required; as welded it gives 530 MPa yield and 630 MPa tensile. | 530 | 630 | 27 | 195 HB | 6 % IACS |
What is E80C-Ni3 AW-M21?
E80C-Ni3 AW-M21 is E80C-Ni3 supplied in the AW-M21 condition — choose 75–80 % Ar / balance CO₂ shielding when best low-temperature impact values and minimum spatter are required; as welded it gives 530 MPa yield and 630 MPa tensile. E80C-Ni3 AW-M21 has a yield strength of 530 MPa (76.9 ksi) and a tensile strength of 630 MPa (91.4 ksi) — stronger than 69% of steel grades. Elongation at break is 27% and the elastic modulus is 205 GPa (29.7 Msi). E80C-Ni3 AW-M21 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,440°C (2,624 °F). AW is the default condition FabDigit quotes; AW-M21 is available on request or by drawing note.
Advantages
- Tough — resists crack growth — 140 MPa·√m (127.4 ksi·√in), better than 94% of steel grades
- Readily welded — 90/100, better than 90% of steel grades
- Ductile — tolerates forming and impact — 27%, better than 86% of steel grades
Limitations
- High embodied carbon — 3 kg CO₂/kg, worse than 91% of steel grades
- Low electrical conductivity — 6 % IACS, worse than 78% of steel grades
E80C-Ni3 AW-M21 properties
Typical room-temperature values for E80C-Ni3 AW-M21; 23 are specific to this condition. Other listed values are E80C-Ni3 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
E80C-Ni3 AW-M21 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,440°C (2,624 °F).
Mechanical15
E80C-Ni3 AW-M21 has a yield strength of 530 MPa (76.9 ksi) and a tensile strength of 630 MPa (91.4 ksi) — stronger than 69% of steel grades. Elongation at break is 27% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
E80C-Ni3 AW-M21 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 11.8 µm/m·K (6.56 µin/in·°F).
Electrical3
E80C-Ni3 AW-M21 conducts electricity at 6 % IACS, worse than 78% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (13/100), better than 66% of steel grades.
Sustainability4
Producing a kilogram of E80C-Ni3 AW-M21 takes about 40 MJ of energy and emits 3 kg of CO₂ — more than 91% of steel grades. Typical recycled content is 25%.
Manufacturability7
E80C-Ni3 AW-M21's machinability is good (55/100, better than 62% of steel grades); weldability excellent (90/100); formability fair (44/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with E80C-Ni3 AW-M21
Is E80C-Ni3 easy to machine?
The deposited metal is fine-grained bainite/ferrite at about 190 HB and machines normally with carbide tooling; the post-weld heat treated condition cuts more easily.
Can E80C-Ni3 be welded?
Use M21 or CO₂ shielding, mainly in flat and horizontal positions; hold interpass temperature below 150 °C and heat input at or below 2.0 kJ/mm to preserve low-temperature impact values, and keep the wire in dry storage.
Can E80C-Ni3 be formed, bent or molded?
This is a welding filler with no forming operations; groove design and interpass slag removal directly determine joint toughness.
What surface finishes work on E80C-Ni3?
Welds can be ground flush and painted, or thermally sprayed with aluminium or zinc for corrosion protection; anodizing does not apply, and low-temperature equipment surfaces are usually blast-cleaned and epoxy coated.
E80C-Ni3 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 |
|---|---|---|
| Cdeposited metal analysis | ≤ 0.12 | 0.05 |
| Mn | ≤ 1.25 | 0.9 |
| Si | ≤ 0.8 | 0.4 |
| Nikey element for low-temperature toughness | 2.75 – 3.75 | 3.25 |
| Cr | ≤ 0.15 | 0.03 |
| Mo | ≤ 0.35 | 0.02 |
| V | ≤ 0.05 | 0.01 |
| Cucounted when a copper coating is present | ≤ 0.35 | 0.05 |
| P | ≤ 0.03 | 0.01 |
| S | ≤ 0.03 | 0.01 |
| Fe | balance | — |
E80C-Ni3 AW-M21 — frequently asked
What is E80C-Ni3 AW-M21 used for?
E80C-Ni3 AW-M21 is typically used for arctic pipeline steel, LNG-adjacent structural steel, cold climate offshore structures and low-temperature storage vessels. In short: best low-temperature toughness in series; 3.25 % Ni deposit; arctic-service filler.
What is the yield strength of E80C-Ni3 AW-M21?
E80C-Ni3 AW-M21 has a typical yield strength of 530 MPa (76.9 ksi) and a tensile strength of 630 MPa (91.4 ksi) — stronger than 69% of steel grades. Strength varies by condition: see the 4 listed tempers.
Is E80C-Ni3 AW-M21 easy to machine?
Reasonably — machinability is rated good (55/100, better than 62% of steel grades). The deposited metal is fine-grained bainite/ferrite at about 190 HB and machines normally with carbide tooling; the post-weld heat treated condition cuts more easily.
Can E80C-Ni3 AW-M21 be welded?
Yes — weldability is rated excellent (90/100). Use M21 or CO₂ shielding, mainly in flat and horizontal positions; hold interpass temperature below 150 °C and heat input at or below 2.0 kJ/mm to preserve low-temperature impact values, and keep the wire in dry storage.
What surface finishes work on E80C-Ni3 AW-M21?
Welds can be ground flush and painted, or thermally sprayed with aluminium or zinc for corrosion protection; anodizing does not apply, and low-temperature equipment surfaces are usually blast-cleaned and epoxy coated.
Can E80C-Ni3 AW-M21 be formed, bent or molded?
This is a welding filler with no forming operations; groove design and interpass slag removal directly determine joint toughness.
What is the maximum service temperature of E80C-Ni3 AW-M21?
E80C-Ni3 AW-M21 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 E80C-Ni3-AW and E80C-Ni3 PWHT?
AW is the default condition — use the as-welded, all-weld-metal condition as delivered for routine low-temperature structural joints where no post-weld heat treatment is specified. PWHT: use these values when ASME requires stress relief near 605 °C for 1 h with furnace cooling on pressure vessels or thick-wall joints; strength falls and elongation rises to 29 %. Yield strength is 515 MPa in AW versus 490 MPa in PWHT.
Sources
- AWS A5.29/A5.29M — Low-Alloy Steel Electrodes for Flux Cored Arc Welding — American Welding Society (2010)
- ASME BPVC Section II Part C, SFA-5.29 — ASME (2023)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.6 — Welding, Brazing, and Soldering — ASM International (1993)
- Ni-bearing flux-cored / metal-cored wire all-weld-metal data (Lincoln, ESAB, Kobelco class datasheets) — various producers (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.