Steel ER80S-D2
UNS K10945
ER80S-D2 is a Mn-Mo alloyed carbon-steel solid wire (UNS K10945) that deposits higher-strength 80 ksi-class weld metal for structural and pressure vessel steels.
Reference datasheet — ER80S-D2 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-D2 tempers and conditions
ER80S-D2 is supplied in 2 conditions, soft to hard. AW is the default FabDigit quotes; the values on this page are for it.
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
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 | — |
Supply forms, finishes and certifications
Ways ER80S-D2 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
GTAW-ROD | Cut-length rod for GTAW | Supply form |
AW-M21 | As Welded | Surface finish |
What is ER80S-D2?
ER80S-D2 is a Mn-Mo alloyed carbon-steel solid wire (UNS K10945) that deposits higher-strength 80 ksi-class weld metal for structural and pressure vessel steels. Typical values are 520 MPa yield, 620 MPa tensile, 25 % elongation and about 200 HB (93 HRB), with service to 425 °C; it is supplied as copper-coated spooled wire and cut GTAW rod, with AW, AW-M21, PWHT and GTAW-ROD conditions on file. The deposit has no inherent corrosion resistance and must be coated, and heat input must be controlled to keep low-temperature toughness. Use ER80S-Ni1 where improved sub-zero notch toughness is the governing requirement. ER80S-D2 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-D2 has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 620 MPa (89.9 ksi) — stronger than 67% of steel grades. Elongation at break is 25% and the elastic modulus is 205 GPa (29.7 Msi).
What is ER80S-D2 used for?
- high strength structural steel welding
- pressure vessel fabrication
- heavy equipment welding
Advantages
- Readily welded — 92/100, better than 93% of steel grades
- Ductile — tolerates forming and impact — 25%, better than 77% of steel grades
ER80S-D2 properties
Typical room-temperature values for ER80S-D2-AW; bars are the position among steel grades.
Physical3
ER80S-D2 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 has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 620 MPa (89.9 ksi) — stronger than 67% of steel grades. Elongation at break is 25% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
ER80S-D2 is rated for continuous service to 425°C (797 °F). It conducts heat at 42 W/m·K (24.3 BTU/hr·ft·°F), worse than 56% of steel grades. Thermal expansion is 12.3 µm/m·K (6.83 µin/in·°F).
Electrical2
ER80S-D2 has an electrical resistivity of 2.2×10⁻⁷ Ω·m.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of ER80S-D2 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's machinability is fair (50/100, worse than 53% of steel grades); weldability excellent (92/100); formability fair (45/100).
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-D2 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with ER80S-D2
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.
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 |
What surface finishes work on ER80S-D2?
Weld beads rust quickly — wire-brush/blast and paint, zinc-rich prime or galvanize; not anodizable.
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-D2 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- K10945
- Other
- ER55S-D2
How much does ER80S-D2 cost?
ER80S-D2 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-D2 — frequently asked
What is ER80S-D2 used for?
ER80S-D2 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?
ER80S-D2 has a typical yield strength of 520 MPa (75.4 ksi) and a tensile strength of 620 MPa (89.9 ksi) — stronger than 67% of steel grades. Strength varies by condition: see the 2 listed tempers.
Is ER80S-D2 easy to machine?
Reasonably — machinability is rated fair (50/100, worse than 53% 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 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?
Weld beads rust quickly — wire-brush/blast and paint, zinc-rich prime or galvanize; not anodizable.
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 is the maximum service temperature of ER80S-D2?
ER80S-D2 is rated for continuous use to about 425°C (797 °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.
How much does ER80S-D2 cost?
ER80S-D2 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)
- 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; 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.