Steel E80C-Ni1 PWHT
Heat-treated state
UNS W21030
PWHT = post-weld heat treated
Pick when the fabrication code requires stress relief — strength drops slightly, ductility and toughness improve.
Values for the PWHT condition
Other E80C-Ni1 tempers and conditions
E80C-Ni1 is listed in 2 conditions; see the grade overview at E80C-Ni1.
- 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 | Pick when the fabrication code requires stress relief — strength drops slightly, ductility and toughness improve. | 470 | 570 | 28 | 185 HB | — |
AWDefault As-welded deposit | Default classification condition per AWS A5.28 — use for cold-service structural welds where no PWHT is applied. | 510 | 600 | 25 | 205 HB | — |
What is E80C-Ni1 PWHT?
E80C-Ni1 PWHT is E80C-Ni1 heat treated to PWHT — pick when the fabrication code requires stress relief — strength drops slightly, ductility and toughness improve. E80C-Ni1 PWHT has a yield strength of 470 MPa (68.2 ksi) and a tensile strength of 570 MPa (82.7 ksi) — stronger than 57% of steel grades. Elongation at break is 28% and the elastic modulus is 205 GPa (29.7 Msi). E80C-Ni1 PWHT 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). AW is the default condition FabDigit quotes; PWHT is available on request or by drawing note.
Advantages
- Ductile — tolerates forming and impact — 28%, better than 89% of steel grades
- Readily welded — 88/100, better than 87% of steel grades
- Tough — resists crack growth — 120 MPa·√m (109.2 ksi·√in), better than 81% of steel grades
E80C-Ni1 PWHT properties
Typical room-temperature values for E80C-Ni1 PWHT; 10 are specific to this condition. Other listed values are E80C-Ni1 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
E80C-Ni1 PWHT 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
E80C-Ni1 PWHT has a yield strength of 470 MPa (68.2 ksi) and a tensile strength of 570 MPa (82.7 ksi) — stronger than 57% of steel grades. Elongation at break is 28% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
E80C-Ni1 PWHT 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
E80C-Ni1 PWHT conducts electricity at 8.2 % IACS, better than 61% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (14/100), better than 70% of steel grades.
Sustainability4
Producing a kilogram of E80C-Ni1 PWHT takes about 32 MJ of energy and emits 2.4 kg of CO₂ — more than 70% of steel grades. Typical recycled content is 25%.
Manufacturability6
E80C-Ni1 PWHT's machinability is fair (45/100, worse than 65% of steel grades); weldability excellent (88/100); formability fair (45/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with E80C-Ni1 PWHT
Is E80C-Ni1 easy to machine?
Weld cap machines like a normalized low-alloy steel (~50 % of AISI 1212); expect harder, less uniform passes near the fusion line.
Can E80C-Ni1 be welded?
Run with 75–80 % Ar / balance CO₂ (or 100 % CO₂ with slightly lower toughness), DCEP, preheat per CE of the base steel and cap heat input around 2.0 kJ/mm to protect −40 °C toughness.
Can E80C-Ni1 be formed, bent or molded?
Not a formed product; keep interpass temperature ≤150–200 °C and reseal/redry spools to avoid moisture pickup and porosity.
What surface finishes work on E80C-Ni1?
Deposit rusts freely — grind/blast and prime or galvanize; the ~1 % Ni gives no meaningful bare-metal corrosion protection.
E80C-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 weld metal max | ≤ 0.12 | 0.06 |
| Mn | ≤ 1.25 | 1.1 |
| Si | ≤ 0.8 | 0.5 |
| Nitoughness alloying | 0.8 – 1.1 | 0.95 |
| Cr | ≤ 0.15 | 0.03 |
| Mo | ≤ 0.35 | 0.02 |
| V | ≤ 0.05 | 0.01 |
| Cuincludes any coating copper | ≤ 0.35 | 0.05 |
| P | ≤ 0.03 | 0.01 |
| S | ≤ 0.03 | 0.01 |
| Fe | balance | — |
E80C-Ni1 PWHT — frequently asked
What is E80C-Ni1 PWHT used for?
E80C-Ni1 PWHT is typically used for low-temperature pipeline steel, cold region structural fabrication, offshore jacket structures and pressure vessel low-temperature service. In short: entry-level cold-service filler; 1 % Ni toughness boost; lowest-alloy Ni-series option.
What is the yield strength of E80C-Ni1 PWHT?
E80C-Ni1 PWHT has a typical yield strength of 470 MPa (68.2 ksi) and a tensile strength of 570 MPa (82.7 ksi) — stronger than 57% of steel grades. Strength varies by condition: see the 2 listed tempers.
Is E80C-Ni1 PWHT easy to machine?
Reasonably — machinability is rated fair (45/100, worse than 65% of steel grades). Weld cap machines like a normalized low-alloy steel (~50 % of AISI 1212); expect harder, less uniform passes near the fusion line.
Can E80C-Ni1 PWHT be welded?
Yes — weldability is rated excellent (88/100). Run with 75–80 % Ar / balance CO₂ (or 100 % CO₂ with slightly lower toughness), DCEP, preheat per CE of the base steel and cap heat input around 2.0 kJ/mm to protect −40 °C toughness.
What surface finishes work on E80C-Ni1 PWHT?
Deposit rusts freely — grind/blast and prime or galvanize; the ~1 % Ni gives no meaningful bare-metal corrosion protection.
Can E80C-Ni1 PWHT be formed, bent or molded?
Not a formed product; keep interpass temperature ≤150–200 °C and reseal/redry spools to avoid moisture pickup and porosity.
What is the maximum service temperature of E80C-Ni1 PWHT?
E80C-Ni1 PWHT 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-Ni1-AW and E80C-Ni1 PWHT?
AW is the default condition — default classification condition per AWS A5.28 — use for cold-service structural welds where no PWHT is applied. PWHT: pick when the fabrication code requires stress relief — strength drops slightly, ductility and toughness improve. Yield strength is 510 MPa in AW versus 470 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 Ni1 wire typical 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.