Steel E70T-1
E70T-1 is a gas-shielded rutile flux-cored wire for carbon steel in the AWS A5.20 E7XT family, depositing about 490 MPa yield, 580 MPa tensile, 26 % elongation and 185 HB.
Reference datasheet — E70T-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.
E70T-1 tempers and conditions
E70T-1 is supplied in 2 conditions, soft to hard.
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Post-weld heat treated | Use when the fabrication is code-required to be stress relieved; strength drops, ductility and toughness improve. | 440 | 540 | 30 | 165 HB | 10 % IACS |
As Welded | Choose mixed gas for lower spatter, slightly higher strength and better low-temperature toughness. | 515 | 600 | 27 | 11 HRC | 10 % IACS |
Supply forms, finishes and certifications
Ways E70T-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 E70T-1?
E70T-1 is a gas-shielded rutile flux-cored wire for carbon steel in the AWS A5.20 E7XT family, depositing about 490 MPa yield, 580 MPa tensile, 26 % elongation and 185 HB. It is chosen for high deposition rates on flat and horizontal joints in heavy plate work, and is supplied as drawn tubular wire on 15 kg spools. Limits are position (flat and horizontal only), the need for CO₂ or Ar-CO₂ shielding gas, and a deposit with no corrosion resistance. For all-position or gasless field welding use a self-shielded E71T-11 or E71T-8. E70T-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). E70T-1 has a yield strength of 490 MPa (71.1 ksi) and a tensile strength of 580 MPa (84.1 ksi) — stronger than 61% of steel grades. Elongation at break is 26% and the elastic modulus is 205 GPa (29.7 Msi).
What is E70T-1 used for?
- heavy plate fabrication
- shipbuilding
- structural steel
- high-productivity welding
Advantages
- Readily welded — 95/100, better than 97% of steel grades
- High electrical conductivity — 10 % IACS, better than 83% of steel grades
- Ductile — tolerates forming and impact — 26%, better than 82% of steel grades
- Conducts heat well — 48 W/m·K (27.7 BTU/hr·ft·°F), better than 79% of steel grades
Limitations
- Hard to polish — 45/100, worse than 84% of steel grades
E70T-1 properties
Typical room-temperature values; bars are the position among steel grades.
Physical3
E70T-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
E70T-1 has a yield strength of 490 MPa (71.1 ksi) and a tensile strength of 580 MPa (84.1 ksi) — stronger than 61% of steel grades. Elongation at break is 26% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
E70T-1 is rated for continuous service to 400°C (752 °F). It conducts heat at 48 W/m·K (27.7 BTU/hr·ft·°F), better than 79% of steel grades. Thermal expansion is 12.4 µm/m·K (6.89 µin/in·°F).
Electrical3
E70T-1 conducts electricity at 10 % IACS, better than 83% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (11/100), worse than 73% of steel grades.
Sustainability4
Producing a kilogram of E70T-1 takes about 35 MJ of energy and emits 2.4 kg of CO₂ — more than 87% of steel grades. Typical recycled content is 30%.
Manufacturability4
E70T-1's machinability is good (55/100, better than 62% of steel grades); weldability excellent (95/100).
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. E70T-1 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with E70T-1
Is E70T-1 easy to machine?
As-deposited weld metal machines like normalized 1020–1030 steel; remove slag and grind the crown first to avoid chipping carbide on residual oxide.
Can E70T-1 be welded?
DCEP, flat/horizontal only; 20–25 L/min CO₂ or Ar-CO₂, 15–25 mm stickout, keep wire in sealed packaging or re-bake to prevent moisture-induced porosity.
Can E70T-1 be formed, bent or molded?
Supplied as drawn tubular wire on 15 kg spools; do not kink or crush the sheath — deformed wire causes feeding faults and arc instability.
E70T-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 deposit much lower | ≤ 0.18 | 0.05 |
| Mn | ≤ 1.75 | 1.35 |
| Si | ≤ 0.9 | 0.55 |
| P | ≤ 0.03 | 0.01 |
| S | ≤ 0.03 | 0.01 |
| Niresidual limit | ≤ 0.5 | 0.02 |
| Crresidual limit | ≤ 0.2 | 0.03 |
| Moresidual limit | ≤ 0.3 | 0.01 |
| Vresidual limit | ≤ 0.08 | 0.01 |
| Fe | balance |
What surface finishes work on E70T-1?
Self-releasing rutile slag chips off easily; weld surface must be painted, metallized or galvanized for outdoor service since the deposit has no corrosion resistance.
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 E70T-1 cost?
E70T-1 is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
E70T-1 — frequently asked
What is E70T-1 used for?
E70T-1 is typically used for heavy plate fabrication, shipbuilding, structural steel and high-productivity welding. In short: high-deposition gas-shielded FCAW; flat and horizontal only; easy rutile slag release.
What is the yield strength of E70T-1?
E70T-1 has a typical yield strength of 490 MPa (71.1 ksi) and a tensile strength of 580 MPa (84.1 ksi) — stronger than 61% of steel grades. Strength varies by condition: see the 2 listed tempers.
Is E70T-1 easy to machine?
Reasonably — machinability is rated good (55/100, better than 62% of steel grades). As-deposited weld metal machines like normalized 1020–1030 steel; remove slag and grind the crown first to avoid chipping carbide on residual oxide.
Can E70T-1 be welded?
Yes — weldability is rated excellent (95/100). DCEP, flat/horizontal only; 20–25 L/min CO₂ or Ar-CO₂, 15–25 mm stickout, keep wire in sealed packaging or re-bake to prevent moisture-induced porosity.
What surface finishes work on E70T-1?
Self-releasing rutile slag chips off easily; weld surface must be painted, metallized or galvanized for outdoor service since the deposit has no corrosion resistance.
Can E70T-1 be formed, bent or molded?
Supplied as drawn tubular wire on 15 kg spools; do not kink or crush the sheath — deformed wire causes feeding faults and arc instability.
What is the maximum service temperature of E70T-1?
E70T-1 is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does E70T-1 cost?
E70T-1 is a budget-cost steel ($), 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 Carbon Steel Electrodes for Flux Cored Arc Welding — American Welding Society (2015)
- ASM Handbook Vol.6 — Welding, Brazing and Soldering — ASM International (1993)
- Flux-cored wire E70T-1C/1M datasheets — Lincoln Electric / Kobelco / (2023)
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.