Steel E80C-Ni2-M21
Grade
M21 = m21 shielding
Preferred mix for spray transfer, low spatter and the best low-temperature Charpy values from this wire.
Values for the M21 condition
Other E80C-Ni2 tempers and conditions
E80C-Ni2 is listed in 4 conditions; see the grade overview at E80C-Ni2.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Post-weld heat treated | Pick when the fabrication code requires post-weld stress relief of pressure or thick-section joints; strength drops slightly, ductility and toughness improve. | 495 | 590 | 28 | 178 HB | — |
C1 shielding | Lowest-cost gas, deeper penetration and more spatter; slightly lower silicon/manganese recovery so strength and low-temperature toughness sit at the low end. | 505 | 600 | 25 | 186 HB | 40 W/m·K |
AWDefault As-welded deposit | Standard classification condition for structural and low-temperature service where no PWHT is applied. | 520 | 620 | 26 | 190 HB | — |
M21This page M21 shielding | Preferred mix for spray transfer, low spatter and the best low-temperature Charpy values from this wire. | 540 | 630 | 27 | 194 HB | 8.5 % IACS |
What is E80C-Ni2-M21?
E80C-Ni2-M21 is E80C-Ni2 in the M21 grade — preferred mix for spray transfer, low spatter and the best low-temperature Charpy values from this wire. E80C-Ni2-M21 has a yield strength of 540 MPa (78.3 ksi) and a tensile strength of 630 MPa (91.4 ksi) — stronger than 70% of steel grades. Elongation at break is 27% and the elastic modulus is 205 GPa (29.7 Msi). E80C-Ni2-M21 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,450°C (2,642 °F). AW is the default condition FabDigit quotes; M21 is available on request or by drawing note.
Advantages
- Readily welded — 88/100, better than 87% of steel grades
- Ductile — tolerates forming and impact — 27%, better than 86% of steel grades
- Tough — resists crack growth — 115 MPa·√m (104.7 ksi·√in), better than 77% of steel grades
Limitations
- High embodied carbon — 2.6 kg CO₂/kg, worse than 87% of steel grades
E80C-Ni2-M21 properties
Typical room-temperature values for E80C-Ni2-M21; 21 are specific to this condition. Other listed values are E80C-Ni2 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
E80C-Ni2-M21 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,450°C (2,642 °F).
Mechanical15
E80C-Ni2-M21 has a yield strength of 540 MPa (78.3 ksi) and a tensile strength of 630 MPa (91.4 ksi) — stronger than 70% of steel grades. Elongation at break is 27% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
E80C-Ni2-M21 is rated for continuous service to 400°C (752 °F). It conducts heat at 40 W/m·K (23.1 BTU/hr·ft·°F), worse than 64% of steel grades. Thermal expansion is 12.5 µm/m·K (6.94 µin/in·°F).
Electrical3
E80C-Ni2-M21 conducts electricity at 8.5 % IACS, better than 63% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (13/100), better than 66% of steel grades.
Sustainability4
Producing a kilogram of E80C-Ni2-M21 takes about 36 MJ of energy and emits 2.6 kg of CO₂ — more than 89% of steel grades. Typical recycled content is 20%.
Manufacturability5
E80C-Ni2-M21's machinability is fair (54/100, better than 54% of steel grades); weldability excellent (88/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with E80C-Ni2-M21
Is E80C-Ni2 easy to machine?
Deposited metal machines like normalized ~550 MPa low-alloy steel; carbide tooling handles the harder as-welded cap, and stress relief improves chip control.
Can E80C-Ni2 be welded?
DCEP, 100% CO₂ or Ar+20–25% CO₂ at 14–25 L/min; keep interpass 150–250 °C, preheat per carbon equivalent and thickness, and store/re-bake wire dry to limit hydrogen cracking.
Can E80C-Ni2 be formed, bent or molded?
Not a wrought product — supplied as spooled tubular wire; joint groove design and bead sequencing control distortion.
What surface finishes work on E80C-Ni2?
Grind or blast the deposit and apply primer/paint or metallizing; the weld metal has no more corrosion resistance than the base steel.
E80C-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 |
|---|---|---|
| Cundiluted weld metal | ≤ 0.12 | 0.05 |
| Mn | ≤ 1.6 | 1.2 |
| Si | ≤ 0.8 | 0.45 |
| P | ≤ 0.03 | 0.01 |
| S | ≤ 0.03 | 0.01 |
| Nidefining alloy addition for low-temperature toughness | 2 – 2.75 | 2.3 |
| Cr | ≤ 0.15 | 0.04 |
| Mo | ≤ 0.35 | 0.05 |
| V | ≤ 0.05 | 0.01 |
| Cuincludes any copper coating on the wire | ≤ 0.35 | 0.05 |
| Fe | balance | — |
E80C-Ni2-M21 — frequently asked
What is E80C-Ni2-M21 used for?
E80C-Ni2-M21 is typically used for low-temperature structural steel, offshore and marine structures, pipeline steel welding and pressure vessel fabrication. In short: tougher than Ni1; offshore structural filler; 2 % Ni cold-service deposit.
What is the yield strength of E80C-Ni2-M21?
E80C-Ni2-M21 has a typical yield strength of 540 MPa (78.3 ksi) and a tensile strength of 630 MPa (91.4 ksi) — stronger than 70% of steel grades. Strength varies by condition: see the 4 listed tempers.
Is E80C-Ni2-M21 easy to machine?
Reasonably — machinability is rated fair (54/100, better than 54% of steel grades). Deposited metal machines like normalized ~550 MPa low-alloy steel; carbide tooling handles the harder as-welded cap, and stress relief improves chip control.
Can E80C-Ni2-M21 be welded?
Yes — weldability is rated excellent (88/100). DCEP, 100% CO₂ or Ar+20–25% CO₂ at 14–25 L/min; keep interpass 150–250 °C, preheat per carbon equivalent and thickness, and store/re-bake wire dry to limit hydrogen cracking.
What surface finishes work on E80C-Ni2-M21?
Grind or blast the deposit and apply primer/paint or metallizing; the weld metal has no more corrosion resistance than the base steel.
Can E80C-Ni2-M21 be formed, bent or molded?
Not a wrought product — supplied as spooled tubular wire; joint groove design and bead sequencing control distortion.
What is the maximum service temperature of E80C-Ni2-M21?
E80C-Ni2-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-Ni2-AW and E80C-Ni2 PWHT?
AW is the default condition — standard classification condition for structural and low-temperature service where no PWHT is applied. PWHT: pick when the fabrication code requires post-weld stress relief of pressure or thick-section joints; strength drops slightly, ductility and toughness improve. Yield strength is 520 MPa in AW versus 495 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 and Selection: Irons, Steels — ASM International (1990)
- Metal-cored low-alloy Ni-bearing wire datasheets (Lincoln Electric, ESAB, Hobart) — various (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.