Steel ER110S-1
UNS K21015
ER110S-1 is a higher-alloyed Mn-Ni-Mo solid welding wire, UNS K21015, for GMAW and GTAW of quenched-and-tempered steels such as HY-110.
Reference datasheet — ER110S-1 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
ER110S-1 tempers and conditions
ER110S-1 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 | Choose when code or thick-section restraint demands stress relief; strength drops slightly while ductility and toughness improve. | 690 | 780 | 21 | 21 HRC | 8 % IACS |
AWDefault As-welded deposit | Standard condition for GMAW/GTAW joints in Q&T high-strength steel where 110 ksi weld strength and low-temperature toughness are required without PWHT. | 730 | 815 | 19 | 24 HRC | — |
What is ER110S-1?
ER110S-1 is a higher-alloyed Mn-Ni-Mo solid welding wire, UNS K21015, for GMAW and GTAW of quenched-and-tempered steels such as HY-110. It delivers roughly 110 ksi tensile weld metal — 730 MPa yield, 815 MPa tensile, 19 % elongation and 250 HB (24 HRC) — and is supplied as copper-coated drawn wire on layer-wound spools. The higher strength comes with lower elongation and tighter procedure limits: low hydrogen, preheat and restricted heat input are needed to keep toughness and avoid cold cracking, with service capped at 400 °C. Where 100 ksi weld metal is sufficient, ER100S-1 is more forgiving. ER110S-1 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). ER110S-1 has a yield strength of 730 MPa (106 ksi) and a tensile strength of 815 MPa (118 ksi) — stronger than 83% of steel grades. Elongation at break is 19% and the elastic modulus is 205 GPa (29.7 Msi).
What is ER110S-1 used for?
- HY-110 steel welding
- High-strength ship hull structures
- Heavy crane and mining equipment
- Military vehicle fabrication
Advantages
- High strength — 730 MPa (106 ksi), better than 83% of steel grades
- Readily welded — 82/100, better than 81% of steel grades
ER110S-1 properties
Typical room-temperature values for ER110S-1-AW; bars are the position among steel grades.
Physical3
ER110S-1 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
ER110S-1 has a yield strength of 730 MPa (106 ksi) and a tensile strength of 815 MPa (118 ksi) — stronger than 83% of steel grades. Elongation at break is 19% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
ER110S-1 is rated for continuous service to 400°C (752 °F). It conducts heat at 38 W/m·K (22 BTU/hr·ft·°F), worse than 69% of steel grades. Thermal expansion is 12.3 µm/m·K (6.83 µin/in·°F).
Electrical3
ER110S-1 conducts electricity at 7.8 % IACS, worse than 57% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (13/100), better than 66% of steel grades.
Sustainability4
Producing a kilogram of ER110S-1 takes about 32 MJ of energy and emits 2.4 kg of CO₂ — more than 70% of steel grades. Typical recycled content is 25%.
Manufacturability7
ER110S-1's machinability is fair (42/100, worse than 73% of steel grades); weldability very good (82/100); 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. ER110S-1 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with ER110S-1
Is ER110S-1 easy to machine?
Weld deposit machines like a 700–800 MPa Q&T low-alloy steel — use carbide, moderate speeds and rigid setups; expect hardness spikes near the fusion line.
Can ER110S-1 be welded?
Run GMAW with Ar + 5–25 % CO₂ (or Ar-2%O₂) or GTAW with pure Ar; keep hydrogen low, preheat/interpass per steel thickness (typically 100–150 °C) and limit heat input to ~2.0 kJ/mm to protect toughness.
Can ER110S-1 be formed, bent or molded?
Supplied as copper-coated drawn wire on layer-wound spools; ensure smooth liner and correct drive-roll pressure to avoid coating flake and birdnesting.
ER110S-1 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 | ≤ 0.1 | 0.08 |
| Mn | 1.4 – 1.8 | 1.6 |
| Si | 0.2 – 0.55 | 0.4 |
| P | ≤ 0.01 | 0.01 |
| S | ≤ 0.01 | 0.01 |
| Ni | 1.9 – 2.6 | 2.2 |
| Cr | ≤ 0.5 | 0.25 |
| Mo | 0.25 – 0.55 | 0.4 |
| V | ≤ 0.04 | 0.01 |
| TiTi+Zr+Al total restricted | ≤ 0.1 | 0.03 |
| Zr | ≤ 0.1 | 0.02 |
| Al | ≤ 0.1 | 0.03 |
| Cuincludes any copper coating | ≤ 0.25 | 0.1 |
| Fe | balance |
What surface finishes work on ER110S-1?
Weld metal rusts like carbon steel — grind, blast and apply zinc-rich primer/paint or metallize; no anodizing possible.
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 ER110S-1 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- K21015
- Also called
- AWS ER110S-1AWS ER76S-1
How much does ER110S-1 cost?
ER110S-1 is a premium-cost steel ($$$), cheaper than about 51% 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.
ER110S-1 — frequently asked
What is ER110S-1 used for?
ER110S-1 is typically used for HY-110 steel welding, high-strength ship hull structures, heavy crane and mining equipment and military vehicle fabrication. In short: highest strength in family; matches HY-110 plate; demands strict heat-input control.
What is the yield strength of ER110S-1?
ER110S-1 has a typical yield strength of 730 MPa (106 ksi) and a tensile strength of 815 MPa (118 ksi) — stronger than 83% of steel grades. Strength varies by condition: see the 2 listed tempers.
Is ER110S-1 easy to machine?
Not especially — machinability is rated fair (42/100, worse than 73% of steel grades). Weld deposit machines like a 700–800 MPa Q&T low-alloy steel — use carbide, moderate speeds and rigid setups; expect hardness spikes near the fusion line.
Can ER110S-1 be welded?
Yes — weldability is rated very good (82/100). Run GMAW with Ar + 5–25 % CO₂ (or Ar-2%O₂) or GTAW with pure Ar; keep hydrogen low, preheat/interpass per steel thickness (typically 100–150 °C) and limit heat input to ~2.0 kJ/mm to protect toughness.
What surface finishes work on ER110S-1?
Weld metal rusts like carbon steel — grind, blast and apply zinc-rich primer/paint or metallize; no anodizing possible.
Can ER110S-1 be formed, bent or molded?
Supplied as copper-coated drawn wire on layer-wound spools; ensure smooth liner and correct drive-roll pressure to avoid coating flake and birdnesting.
What is the maximum service temperature of ER110S-1?
ER110S-1 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 ER110S-1-AW and ER110S-1 PWHT?
AW is the default condition — standard condition for GMAW/GTAW joints in Q&T high-strength steel where 110 ksi weld strength and low-temperature toughness are required without PWHT. PWHT: choose when code or thick-section restraint demands stress relief; strength drops slightly while ductility and toughness improve. Yield strength is 730 MPa in AW versus 690 MPa in PWHT.
How much does ER110S-1 cost?
ER110S-1 is a premium-cost steel ($$$), cheaper than about 51% 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 and High-Performance Alloys — ASM International (1990)
- High-strength solid wire datasheets (Lincoln Electric, ESAB, voestalpine Böhler Welding) — various (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.