Steel E71T-11
E71T-11 is a self-shielded flux-cored wire for mild steel that runs without external shielding gas, depositing roughly 470 MPa yield, 560 MPa tensile, 25 % elongation and 180 HB (89 HRB), with service to 350 °C.
Reference datasheet — E71T-11 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
E71T-11 tempers and conditions
E71T-11 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 |
|---|---|---|---|---|---|---|
Stress relieved | Choose when code-required PWHT or distortion control is applied; strength drops slightly and ductility improves. | 430 | 530 | 28 | 165 HB | 10.5 % IACS |
AWDefault As-welded deposit | Default condition for all field and structural work; classification test values in AWS A5.20 are reported in this state. | 470 | 560 | 25 | 180 HB | 10 % IACS |
What is E71T-11?
E71T-11 is a self-shielded flux-cored wire for mild steel that runs without external shielding gas, depositing roughly 470 MPa yield, 560 MPa tensile, 25 % elongation and 180 HB (89 HRB), with service to 350 °C. Engineers use it for outdoor and field construction where wind would disturb a gas shield, and it welds in all positions from small portable or engine-driven machines. Limits are DCEN polarity only, no impact classification, and a maker-specified thickness ceiling (typically ≤ 12–19 mm). Where low-temperature notch toughness is required, move to E71T-8. E71T-11 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,465°C (2,669 °F). E71T-11 has a yield strength of 470 MPa (68.2 ksi) and a tensile strength of 560 MPa (81.2 ksi) — stronger than 57% of steel grades. Elongation at break is 25% and the elastic modulus is 205 GPa (29.7 Msi).
What is E71T-11 used for?
- field construction
- outdoor structural welding
- farm equipment
- portable welding operations
Advantages
- Readily welded — 88/100, better than 87% 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
- Ductile — tolerates forming and impact — 25%, better than 77% of steel grades
Limitations
- Hard to polish — 45/100, worse than 84% of steel grades
- Low fracture toughness — 60 MPa·√m (54.6 ksi·√in), worse than 78% of steel grades
E71T-11 properties
Typical room-temperature values for E71T-11-AW; bars are the position among steel grades.
Physical3
E71T-11 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,465°C (2,669 °F).
Mechanical16
E71T-11 has a yield strength of 470 MPa (68.2 ksi) and a tensile strength of 560 MPa (81.2 ksi) — stronger than 57% of steel grades. Elongation at break is 25% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
E71T-11 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-11 conducts electricity at 10 % IACS, better than 83% of steel grades.
Chemical & Environmental2
Corrosion resistance is not recommended (10/100), worse than 86% of steel grades.
Sustainability4
Producing a kilogram of E71T-11 takes about 32 MJ of energy and emits 2.4 kg of CO₂ — more than 70% of steel grades. Typical recycled content is 30%.
Manufacturability6
E71T-11's machinability is fair (50/100, worse than 53% of steel grades); weldability excellent (88/100); 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. E71T-11 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with E71T-11
Is E71T-11 easy to machine?
Deposit machines like a 500 MPa mild steel but expect hard spots and occasional slag inclusions; grind weld caps before finish cutting.
Can E71T-11 be welded?
Run DCEN (electrode negative) with 15–25 mm long stickout, no shielding gas; remove slag between passes and keep deposits within the maker's thickness limit (typically ≤ 12–19 mm) as T-11 has no impact classification.
Can E71T-11 be formed, bent or molded?
Not a formed product; the wire itself is drawn and roll-formed tube/flux — joints should be designed to avoid cold bending through the as-welded bead.
E71T-11 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 carbon-steel FCAW deposit limit; self-shielded T-11 typically 0.15–0.25 | ≤ 0.3 | 0.2 |
| Mn | ≤ 1.75 | 0.55 |
| Si | ≤ 0.9 | 0.3 |
| Alaluminium deoxidizer/nitride former is characteristic of self-shielded wires | ≤ 1.8 | 1.1 |
| S | ≤ 0.03 | 0.01 |
| P | ≤ 0.03 | 0.01 |
| Niresidual | ≤ 0.5 | 0.03 |
| Crresidual | ≤ 0.2 | 0.03 |
| Moresidual | ≤ 0.3 | 0.02 |
| Vresidual | ≤ 0.08 | 0.01 |
| Cuincludes any coating copper | ≤ 0.35 | 0.05 |
| Fe | balance |
What surface finishes work on E71T-11?
Weld metal rusts quickly — wire-brush all slag, then prime/paint, hot-dip galvanize or metallize; slag residue left in place causes coating blisters.
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
How much does E71T-11 cost?
E71T-11 is a standard-cost steel ($$), cheaper than about 71% 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-11 — frequently asked
What is E71T-11 used for?
E71T-11 is typically used for field construction, outdoor structural welding, farm equipment and portable welding operations. In short: no shielding gas needed; suited to windy sites; no impact rating.
What is the yield strength of E71T-11?
E71T-11 has a typical yield strength of 470 MPa (68.2 ksi) and a tensile strength of 560 MPa (81.2 ksi) — stronger than 57% of steel grades. Strength varies by condition: see the 2 listed tempers.
Is E71T-11 easy to machine?
Reasonably — machinability is rated fair (50/100, worse than 53% of steel grades). Deposit machines like a 500 MPa mild steel but expect hard spots and occasional slag inclusions; grind weld caps before finish cutting.
Can E71T-11 be welded?
Yes — weldability is rated excellent (88/100). Run DCEN (electrode negative) with 15–25 mm long stickout, no shielding gas; remove slag between passes and keep deposits within the maker's thickness limit (typically ≤ 12–19 mm) as T-11 has no impact classification.
What surface finishes work on E71T-11?
Weld metal rusts quickly — wire-brush all slag, then prime/paint, hot-dip galvanize or metallize; slag residue left in place causes coating blisters.
Can E71T-11 be formed, bent or molded?
Not a formed product; the wire itself is drawn and roll-formed tube/flux — joints should be designed to avoid cold bending through the as-welded bead.
What is the maximum service temperature of E71T-11?
E71T-11 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.
What is the difference between E71T-11-AW and E71T-11-SR?
AW is the default condition — default condition for all field and structural work; classification test values in AWS A5.20 are reported in this state. SR: choose when code-required PWHT or distortion control is applied; strength drops slightly and ductility improves. Yield strength is 470 MPa in AW versus 430 MPa in SR.
How much does E71T-11 cost?
E71T-11 is a standard-cost steel ($$), cheaper than about 71% 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 — 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)
- Innershield NR-211-MP self-shielded wire datasheet — Lincoln Electric (2023)
- Fabshield 21B (E71T-11) datasheet — Hobart Brothers / ITW (2022)
- ASM Handbook Vol. 6 — Welding, Brazing and Soldering — ASM International (1993)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels — ASM International (1990)
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.