Steel E71T-1-J (E71T-1J)
Grade
Pick when the code or client requires CVN 27 J at -29 °C (-20 °F) instead of -18 °C.
Values for the J condition
Other E71T-1 tempers and conditions
E71T-1 is listed in 3 conditions; see the grade overview at E71T-1.
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 |
JThis page 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 |
What is E71T-1-J?
E71T-1-J is E71T-1 in the J grade — pick when the code or client requires CVN 27 J at -29 °C (-20 °F) instead of -18 °C. E71T-1-J has a yield strength of 500 MPa (72.5 ksi) and a tensile strength of 580 MPa (84.1 ksi) — stronger than 63% of steel grades. Elongation at break is 28% and the elastic modulus is 205 GPa (29.7 Msi). E71T-1-J 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).
Advantages
- Readily welded — 95/100, better than 97% of steel grades
- Ductile — tolerates forming and impact — 28%, better than 89% of steel grades
- Tough — resists crack growth — 130 MPa·√m (118.3 ksi·√in), better than 89% of steel grades
- Forms and bends easily — 71/100, better than 88% of steel grades
- High electrical conductivity — 10 % IACS, better than 83% of steel grades
Limitations
- High embodied carbon — 2.6 kg CO₂/kg, worse than 87% of steel grades
E71T-1-J properties
Typical room-temperature values for E71T-1-J; 23 are specific to this condition. Other listed values are E71T-1 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
E71T-1-J 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-J has a yield strength of 500 MPa (72.5 ksi) and a tensile strength of 580 MPa (84.1 ksi) — stronger than 63% of steel grades. Elongation at break is 28% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
E71T-1-J 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-J 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-J 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-J's machinability is good (58/100, better than 75% of steel grades); weldability excellent (95/100); formability very good (71/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with E71T-1-J
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.
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.
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 | — |
E71T-1-J — frequently asked
What is E71T-1-J used for?
E71T-1-J 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-J?
E71T-1-J has a typical yield strength of 500 MPa (72.5 ksi) and a tensile strength of 580 MPa (84.1 ksi) — stronger than 63% of steel grades. Strength varies by condition: see the 3 listed tempers.
Is E71T-1-J 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-J 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-J?
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-J 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-J?
E71T-1-J 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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.