Steel ER100S-1-AW (As-welded deposit)
Heat-treated state · default condition
UNS K10882
Standard as-deposited condition tested per AWS A5.28 with 75–80 % Ar/balance CO₂; use for most high-strength structural joints.
Values for the AW condition
Other ER100S-1 tempers and conditions
ER100S-1 is listed in 3 conditions; see the grade overview at ER100S-1.
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 | — |
AWDefaultThis page 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 |
What is ER100S-1-AW?
ER100S-1-AW is ER100S-1 heat treated to AW — standard as-deposited condition tested per AWS A5.28 with 75–80 % Ar/balance CO₂; use for most high-strength structural joints. ER100S-1-AW 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). ER100S-1-AW 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).
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-AW properties
Typical room-temperature values for ER100S-1-AW; 11 are specific to this condition. Other listed values are ER100S-1 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
ER100S-1-AW 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-AW 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-AW 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-AW 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-AW 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-AW'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. Confirm any required mill or lot documentation when quoting.
Working with ER100S-1-AW
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.
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.
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 | — |
ER100S-1-AW — frequently asked
What is ER100S-1-AW used for?
ER100S-1-AW 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-AW?
ER100S-1-AW 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-AW 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-AW 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-AW?
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-AW 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-AW?
ER100S-1-AW 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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.