Steel ER100S-1
UNS K10882
ER100S-1 is a Mn-Ni-Mo alloyed solid welding wire, UNS K10882, for GMAW and GTAW of high-strength quenched-and-tempered structural steels such as HY-100 and T-1.
Reference datasheet — ER100S-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
ER100S-1 tempers and conditions
ER100S-1 is supplied in 3 conditions, soft to hard. AW is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Post-weld heat treated | Post-weld stress relief for thick or code-governed joints; residual stress and hardness drop, strength falls modestly while ductility and toughness improve. | 650 | 720 | 23 | 18 HRC | — |
AWDefault As-welded deposit | Standard as-deposited condition tested per AWS A5.28 with 75–80 % Ar/balance CO₂; use for most high-strength structural joints. | 690 | 760 | 21 | 22 HRC | — |
As-Welded, TIG deposit | Cut-length rod deposited by GTAW; slightly cleaner, lower-oxygen weld metal with marginally higher toughness — choose for root passes and thin sections. | 700 | 780 | 22 | 23 HRC | 7.8 % IACS |
Supply forms, finishes and certifications
Ways ER100S-1 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
WIRE | Filler wire/rod as supplied | Supply form |
What is ER100S-1?
ER100S-1 is a Mn-Ni-Mo alloyed solid welding wire, UNS K10882, for GMAW and GTAW of high-strength quenched-and-tempered structural steels such as HY-100 and T-1. The deposit reaches roughly 100 ksi tensile — 690 MPa yield, 760 MPa tensile, 21 % elongation and 235 HB (22 HRC) — and the product is supplied as cold-drawn, copper-coated or bright spooled wire and as cut lengths for TIG. Low-hydrogen practice, preheat and heat-input control are required to avoid cold cracking; maximum service temperature is 400 °C. The deposit is not corrosion resistant, and ER110S-1 is the next step up in strength. ER100S-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). ER100S-1 has a yield strength of 690 MPa (100 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 80% of steel grades. Elongation at break is 21% and the elastic modulus is 205 GPa (29.7 Msi).
What is ER100S-1 used for?
- HY-100 steel welding
- T-1 high-strength steel structures
- Offshore and shipbuilding structures
- Heavy equipment fabrication
Advantages
- Tough — resists crack growth — 130 MPa·√m (118.3 ksi·√in), better than 89% of steel grades
- High strength — 690 MPa (100 ksi), better than 80% of steel grades
- Readily welded — 80/100, better than 79% of steel grades
Limitations
- High embodied carbon — 2.5 kg CO₂/kg, worse than 82% of steel grades
- Difficult to machine — 38/100, worse than 80% of steel grades
ER100S-1 properties
Typical room-temperature values for ER100S-1-AW; bars are the position among steel grades.
Physical3
ER100S-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
ER100S-1 has a yield strength of 690 MPa (100 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 80% of steel grades. Elongation at break is 21% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
ER100S-1 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 12.3 µm/m·K (6.83 µin/in·°F).
Electrical3
ER100S-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 ER100S-1 takes about 32 MJ of energy and emits 2.5 kg of CO₂ — more than 70% of steel grades. Typical recycled content is 30%.
Manufacturability7
ER100S-1's machinability is fair (38/100, worse than 80% of steel grades); weldability very good (80/100); formability fair (40/100).
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. ER100S-1 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with ER100S-1
Is ER100S-1 easy to machine?
Weld metal at ~230 HB machines like Q&T 4130 — carbide tooling, moderate speeds; grind flush rather than mill where possible.
Can ER100S-1 be welded?
Use low-hydrogen practice: dry wire, 75–80 % Ar/CO₂ or 98 Ar/2 O₂, preheat/interpass per base-metal thickness (typically 65–150 °C, max interpass ~230 °C) and control heat input to keep toughness and avoid cold cracking.
Can ER100S-1 be formed, bent or molded?
Supplied as cold-drawn, copper-coated or bright spooled wire; keep spool cast/helix in spec and use appropriate liners to avoid feed problems in push-pull guns.
ER100S-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 |
|---|---|---|
| CAWS A5.28 ER100S-1 | ≤ 0.08 | 0.06 |
| Mn | 1.25 – 1.8 | 1.55 |
| Si | 0.2 – 0.55 | 0.4 |
| Ni | 1.4 – 2.1 | 1.8 |
| Mo | 0.25 – 0.55 | 0.4 |
| Cr | ≤ 0.3 | 0.1 |
| V | ≤ 0.05 | |
| Tideoxidizer | ≤ 0.1 | 0.03 |
| Zrdeoxidizer | ≤ 0.1 | 0.03 |
| Aldeoxidizer | ≤ 0.1 | 0.03 |
| Cuincludes copper coating | ≤ 0.25 | 0.15 |
| P | ≤ 0.01 | 0.01 |
| S | ≤ 0.01 | 0.01 |
| Fe | balance |
What surface finishes work on ER100S-1?
Not corrosion resistant — blast and coat with zinc-rich or epoxy primer; weld beads accept the same paint/metallizing systems as the HY-100/T-1 base metal.
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 ER100S-1 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- K10882
- Also called
- AWS ER100S-1AWS ER69S-1
How much does ER100S-1 cost?
ER100S-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.
ER100S-1 — frequently asked
What is ER100S-1 used for?
ER100S-1 is typically used for HY-100 steel welding, T-1 high-strength steel structures, offshore and shipbuilding structures and heavy equipment fabrication. In short: 100 ksi solid wire; GMAW and GTAW capable; matches HY-100 base metal.
What is the yield strength of ER100S-1?
ER100S-1 has a typical yield strength of 690 MPa (100 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 80% of steel grades. Strength varies by condition: see the 3 listed tempers.
Is ER100S-1 easy to machine?
Not especially — machinability is rated fair (38/100, worse than 80% of steel grades). Weld metal at ~230 HB machines like Q&T 4130 — carbide tooling, moderate speeds; grind flush rather than mill where possible.
Can ER100S-1 be welded?
Yes — weldability is rated very good (80/100). Use low-hydrogen practice: dry wire, 75–80 % Ar/CO₂ or 98 Ar/2 O₂, preheat/interpass per base-metal thickness (typically 65–150 °C, max interpass ~230 °C) and control heat input to keep toughness and avoid cold cracking.
What surface finishes work on ER100S-1?
Not corrosion resistant — blast and coat with zinc-rich or epoxy primer; weld beads accept the same paint/metallizing systems as the HY-100/T-1 base metal.
Can ER100S-1 be formed, bent or molded?
Supplied as cold-drawn, copper-coated or bright spooled wire; keep spool cast/helix in spec and use appropriate liners to avoid feed problems in push-pull guns.
What is the maximum service temperature of ER100S-1?
ER100S-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 ER100S-1-AW and ER100S-1 PWHT?
AW is the default condition — standard as-deposited condition tested per AWS A5.28 with 75–80 % Ar/balance CO₂; use for most high-strength structural joints. PWHT: post-weld stress relief for thick or code-governed joints; residual stress and hardness drop, strength falls modestly while ductility and toughness improve. Yield strength is 690 MPa in AW versus 650 MPa in PWHT.
How much does ER100S-1 cost?
ER100S-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)
- ASTM A514/A514M — High-Yield-Strength Q&T Alloy Steel Plate — ASTM International (2018)
- 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)
- Solid wire datasheets for 100 ksi low-alloy GMAW/GTAW fillers — Lincoln Electric / ESAB / Böhler Welding (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.