Steel E71T-11-SR (Stress relieved)
Heat-treated state
Choose when code-required PWHT or distortion control is applied; strength drops slightly and ductility improves.
Values for the SR condition
Other E71T-11 tempers and conditions
E71T-11 is listed in 2 conditions; see the grade overview at E71T-11.
- SR
- AW
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
SRThis page 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-SR?
E71T-11-SR is E71T-11 heat treated to SR — choose when code-required PWHT or distortion control is applied; strength drops slightly and ductility improves. E71T-11-SR has a yield strength of 430 MPa (62.4 ksi) and a tensile strength of 530 MPa (76.9 ksi) — weaker than 51% of steel grades. Elongation at break is 28% and the elastic modulus is 205 GPa (29.7 Msi). E71T-11-SR 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). AW is the default condition FabDigit quotes; SR is available on request or by drawing note.
Advantages
- Ductile — tolerates forming and impact — 28%, better than 89% of steel grades
- High electrical conductivity — 10.5 % IACS, better than 89% of steel grades
- Conducts heat well — 50 W/m·K (28.9 BTU/hr·ft·°F), better than 87% of steel grades
- Readily welded — 88/100, better than 87% of steel grades
Limitations
- Hard to polish — 45/100, worse than 84% of steel grades
E71T-11-SR properties
Typical room-temperature values for E71T-11-SR; 22 are specific to this condition. Other listed values are E71T-11 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
E71T-11-SR 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-SR has a yield strength of 430 MPa (62.4 ksi) and a tensile strength of 530 MPa (76.9 ksi) — weaker than 51% of steel grades. Elongation at break is 28% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
E71T-11-SR is rated for continuous service to 400°C (752 °F). It conducts heat at 50 W/m·K (28.9 BTU/hr·ft·°F), better than 87% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
E71T-11-SR conducts electricity at 10.5 % IACS, better than 89% 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-SR 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-SR's machinability is good (55/100, better than 62% of steel grades); weldability excellent (88/100); formability fair (50/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with E71T-11-SR
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.
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.
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 | — |
E71T-11-SR — frequently asked
What is E71T-11-SR used for?
E71T-11-SR 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-SR?
E71T-11-SR has a typical yield strength of 430 MPa (62.4 ksi) and a tensile strength of 530 MPa (76.9 ksi) — weaker than 51% of steel grades. Strength varies by condition: see the 2 listed tempers.
Is E71T-11-SR easy to machine?
Reasonably — machinability is rated good (55/100, better than 62% 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-SR 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-SR?
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-SR 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-SR?
E71T-11-SR 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 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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.