Steel E71T-1
E71T-1 is an all-position rutile flux-cored wire (AWS A5.20) run with CO₂ or 80Ar-20CO₂ shielding, depositing weld metal at 490 MPa yield, 570 MPa tensile, 27 % elongation, 185 HB and 90 HRB.
Reference datasheet — E71T-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.
E71T-1 tempers and conditions
E71T-1 is supplied in 3 conditions, soft to hard.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Stress relieved | Use when the fabrication is PWHT'd (pressure parts, thick sections); strength drops, ductility rises. | 440 | 530 | 30 | 165 HB | 10.5 % IACS |
E71T-1J | Pick when the code or client requires CVN 27 J at -29 °C (-20 °F) instead of -18 °C. | 500 | 580 | 28 | 185 HB | 10 % IACS |
As Welded | Choose for lower spatter, smoother spray-like arc and slightly higher strength/toughness than pure CO₂. | 510 | 590 | 28 | 190 HB | 10 % IACS |
Supply forms, finishes and certifications
Ways E71T-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 |
|---|---|---|
AW-CDefault | As Welded | Surface finish |
What is E71T-1?
E71T-1 is an all-position rutile flux-cored wire (AWS A5.20) run with CO₂ or 80Ar-20CO₂ shielding, depositing weld metal at 490 MPa yield, 570 MPa tensile, 27 % elongation, 185 HB and 90 HRB. It is chosen over stick electrodes for structural fabrication because the deposition rate is far higher while bead appearance and out-of-position control remain good; it is supplied as spooled tubular wire in 1.2–1.6 mm sizes. It requires gas shielding, so it is unsuitable for windy field work where self-shielded wire is used, and the deposit is rated to about 350 °C service. For manual work on restrained joints, low-hydrogen E7018 remains the alternative. E71T-1 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,470°C (2,678 °F). E71T-1 has a yield strength of 490 MPa (71.1 ksi) and a tensile strength of 570 MPa (82.7 ksi) — stronger than 61% of steel grades. Elongation at break is 27% and the elastic modulus is 205 GPa (29.7 Msi).
What is E71T-1 used for?
- structural steel welding
- shipbuilding
- heavy fabrication
- out-of-position FCAW
Advantages
- Readily welded — 95/100, better than 97% of steel grades
- Ductile — tolerates forming and impact — 27%, better than 86% of steel grades
- Forms and bends easily — 70/100, better than 86% of steel grades
- High electrical conductivity — 10 % IACS, better than 83% of steel grades
- Conducts heat well — 48 W/m·K (27.7 BTU/hr·ft·°F), better than 79% of steel grades
Limitations
- High embodied carbon — 2.6 kg CO₂/kg, worse than 87% of steel grades
E71T-1 properties
Typical room-temperature values; bars are the position among steel grades.
Physical3
E71T-1 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,470°C (2,678 °F).
Mechanical15
E71T-1 has a yield strength of 490 MPa (71.1 ksi) and a tensile strength of 570 MPa (82.7 ksi) — stronger than 61% of steel grades. Elongation at break is 27% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
E71T-1 is rated for continuous service to 350°C (662 °F). It conducts heat at 48 W/m·K (27.7 BTU/hr·ft·°F), better than 79% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
E71T-1 conducts electricity at 10 % IACS, better than 83% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of E71T-1 takes about 36 MJ of energy and emits 2.6 kg of CO₂ — more than 89% of steel grades. Typical recycled content is 25%.
Manufacturability7
E71T-1's machinability is good (58/100, better than 75% of steel grades); weldability excellent (95/100); formability very good (70/100).
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. E71T-1 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with E71T-1
Is E71T-1 easy to machine?
Deposited metal machines like normalized 1020–1025 steel; grind or mill weld caps with carbide tooling and expect hard spots at the HAZ fusion line.
Can E71T-1 be welded?
DCEP, 22–30 V / 150–280 A depending on diameter, 15–25 L/min CO₂ or 80Ar-20CO₂, 15–25 mm stickout; all-position with slight downhill-avoidance and stringer beads for vertical-up.
Can E71T-1 be formed, bent or molded?
Not a wrought product — the wire itself is drawn/roll-formed strip with flux fill; deposit ductility (≈27% elongation) tolerates normal weldment straightening and cold flanging.
E71T-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 A5.20 deposit limit; typical 0.04–0.06 | ≤ 0.18 | 0.05 |
| MnAWS A5.20 deposit limit | ≤ 1.75 | 1.3 |
| Si | ≤ 0.9 | 0.55 |
| P | ≤ 0.03 | 0.01 |
| S | ≤ 0.03 | 0.01 |
| Niresidual; higher in -1J low-temp types | ≤ 0.5 | 0.02 |
| Crresidual | ≤ 0.2 | 0.02 |
| Moresidual | ≤ 0.3 | 0.01 |
| Vresidual | ≤ 0.08 | 0.01 |
| Cuincludes wire copper coating | ≤ 0.35 | 0.05 |
| Alfrom rutile/deoxidizer system, deposit residual typically < 1.0 | ≤ 1.8 | 0.6 |
| Fe | balance |
What surface finishes work on E71T-1?
Deslag and wire-brush each pass; finished welds accept blast + paint, metallizing or hot-dip galvanizing — the Si-bearing deposit can grow slightly thicker galvanized coating than the base plate.
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 E71T-1 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Also called
- AWS E71T-1
How much does E71T-1 cost?
E71T-1 is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
E71T-1 — frequently asked
What is E71T-1 used for?
E71T-1 is typically used for structural steel welding, shipbuilding, heavy fabrication and out-of-position FCAW. In short: high-deposition all-position wire; higher strength than E7018; needs shielding gas.
What is the yield strength of E71T-1?
E71T-1 has a typical yield strength of 490 MPa (71.1 ksi) and a tensile strength of 570 MPa (82.7 ksi) — stronger than 61% of steel grades. Strength varies by condition: see the 3 listed tempers.
Is E71T-1 easy to machine?
Reasonably — machinability is rated good (58/100, better than 75% of steel grades). Deposited metal machines like normalized 1020–1025 steel; grind or mill weld caps with carbide tooling and expect hard spots at the HAZ fusion line.
Can E71T-1 be welded?
Yes — weldability is rated excellent (95/100). DCEP, 22–30 V / 150–280 A depending on diameter, 15–25 L/min CO₂ or 80Ar-20CO₂, 15–25 mm stickout; all-position with slight downhill-avoidance and stringer beads for vertical-up.
What surface finishes work on E71T-1?
Deslag and wire-brush each pass; finished welds accept blast + paint, metallizing or hot-dip galvanizing — the Si-bearing deposit can grow slightly thicker galvanized coating than the base plate.
Can E71T-1 be formed, bent or molded?
Not a wrought product — the wire itself is drawn/roll-formed strip with flux fill; deposit ductility (≈27% elongation) tolerates normal weldment straightening and cold flanging.
What is the maximum service temperature of E71T-1?
E71T-1 is rated for continuous use to about 350°C (662 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does E71T-1 cost?
E71T-1 is a budget-cost steel ($), cheaper than about 90% 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 A5.20/A5.20M — Specification for Carbon Steel Electrodes for Flux Cored Arc Welding — American Welding Society (2015)
- AWS D1.1/D1.1M Structural Welding Code — Steel — American Welding Society (2020)
- Flux-cored wire E71T-1C/1M product data (Lincoln Electric, Kobelco, Hyundai, / ) — multiple producers (2024)
- ASM Handbook Vol.6 Welding, Brazing and Soldering; Vol.1 Properties of Carbon Steels — ASM International (1993)
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.