Steel ER80S-D2 PWHT
Heat-treated state
UNS K10945
PWHT = post-weld heat treated
Condition used for pressure-vessel and thick-section joints that must be stress relieved; strength drops but ductility and toughness improve.
Values for the PWHT condition
Other ER80S-D2 tempers and conditions
ER80S-D2 is listed in 2 conditions; see the grade overview at ER80S-D2.
- 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 | Condition used for pressure-vessel and thick-section joints that must be stress relieved; strength drops but ductility and toughness improve. | 470 | 570 | 27 | 10 HRC | 8 % IACS |
AWDefault As-welded deposit | Default all-weld-metal condition per AWS A5.28 classification test with CO₂ shielding gas. | 520 | 620 | 25 | 200 HB | — |
What is ER80S-D2 PWHT?
ER80S-D2 PWHT is ER80S-D2 heat treated to PWHT — condition used for pressure-vessel and thick-section joints that must be stress relieved; strength drops but ductility and toughness improve. ER80S-D2 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 27% and the elastic modulus is 205 GPa (29.7 Msi). ER80S-D2 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
- Readily welded — 92/100, better than 93% of steel grades
- Tough — resists crack growth — 130 MPa·√m (118.3 ksi·√in), better than 89% of steel grades
- Ductile — tolerates forming and impact — 27%, better than 86% of steel grades
- High service temperature — 450°C (842 °F), better than 86% of steel grades
ER80S-D2 PWHT properties
Typical room-temperature values for ER80S-D2 PWHT; 23 are specific to this condition. Other listed values are ER80S-D2 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
ER80S-D2 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
ER80S-D2 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 27% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
ER80S-D2 PWHT is rated for continuous service to 450°C (842 °F). It conducts heat at 43 W/m·K (24.8 BTU/hr·ft·°F), better than 51% of steel grades. Thermal expansion is 12.3 µm/m·K (6.83 µin/in·°F).
Electrical2
ER80S-D2 PWHT has an electrical resistivity of 2.15×10⁻⁷ Ω·m.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of ER80S-D2 PWHT takes about 32 MJ of energy and emits 2.3 kg of CO₂ — more than 70% of steel grades. Typical recycled content is 25%.
Manufacturability7
ER80S-D2 PWHT's machinability is good (56/100, better than 71% of steel grades); weldability excellent (92/100); formability fair (52/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with ER80S-D2 PWHT
Is ER80S-D2 easy to machine?
Deposited weld metal machines like a normalized HSLA steel (~55 % of AISI 1212); carbide tooling and moderate speeds handle the ~200 HB deposit.
Can ER80S-D2 be welded?
Run with CO₂ or Ar–15/25 % CO₂, DCEP; keep interpass ≤ 250 °C and heat input moderate to preserve -29 °C toughness, and preheat thick or high-carbon-equivalent base metal.
Can ER80S-D2 be formed, bent or molded?
Supplied as drawn, copper-coated wire on spools or as cut rods; feedability is good but avoid tight liner bends that shave the coating.
What surface finishes work on ER80S-D2?
Weld beads rust quickly — wire-brush/blast and paint, zinc-rich prime or galvanize; not anodizable.
ER80S-D2 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 |
|---|---|---|
| C | 0.07 – 0.12 | 0.09 |
| Mn | 1.6 – 2.1 | 1.85 |
| Si | 0.5 – 0.8 | 0.65 |
| Mo | 0.4 – 0.6 | 0.5 |
| Ni | ≤ 0.15 | 0.05 |
| Crresidual, typical practice | ≤ 0.05 | 0.02 |
| P | ≤ 0.03 | 0.01 |
| S | ≤ 0.03 | 0.01 |
| Cuincluding any copper coating | ≤ 0.5 | 0.2 |
| Fe | balance | — |
ER80S-D2 PWHT — frequently asked
What is ER80S-D2 PWHT used for?
ER80S-D2 PWHT is typically used for high strength structural steel welding, pressure vessel fabrication and heavy equipment welding. In short: 80 ksi Mn-Mo deposit; higher strength than plain carbon wire; coating required for corrosion.
What is the yield strength of ER80S-D2 PWHT?
ER80S-D2 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 ER80S-D2 PWHT easy to machine?
Reasonably — machinability is rated good (56/100, better than 71% of steel grades). Deposited weld metal machines like a normalized HSLA steel (~55 % of AISI 1212); carbide tooling and moderate speeds handle the ~200 HB deposit.
Can ER80S-D2 PWHT be welded?
Yes — weldability is rated excellent (92/100). Run with CO₂ or Ar–15/25 % CO₂, DCEP; keep interpass ≤ 250 °C and heat input moderate to preserve -29 °C toughness, and preheat thick or high-carbon-equivalent base metal.
What surface finishes work on ER80S-D2 PWHT?
Weld beads rust quickly — wire-brush/blast and paint, zinc-rich prime or galvanize; not anodizable.
Can ER80S-D2 PWHT be formed, bent or molded?
Supplied as drawn, copper-coated wire on spools or as cut rods; feedability is good but avoid tight liner bends that shave the coating.
What is the maximum service temperature of ER80S-D2 PWHT?
ER80S-D2 PWHT is rated for continuous use to about 450°C (842 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between ER80S-D2-AW and ER80S-D2 PWHT?
AW is the default condition — default all-weld-metal condition per AWS A5.28 classification test with CO₂ shielding gas. PWHT: condition used for pressure-vessel and thick-section joints that must be stress relieved; strength drops but ductility and toughness improve. Yield strength is 520 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)
- ASME BPVC Section II Part C — SFA-5.28 — ASME (2023)
- ASM Handbook Vol. 6 — Welding, Brazing and Soldering — ASM International (1993)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels — ASM International (1990)
- ER80S-D2 solid wire all-weld-metal data — Lincoln Electric / ESAB / (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.