Steel E7018
GOST E7018 · JIS D5016 · GB J507, E5015
E7018 is a low-hydrogen, iron-powder SMAW electrode from the AWS A5.1 family, also listed as J507, D5016, E5015 and E5018, depositing a C-Mn weld metal with 450 MPa yield, 540 MPa tensile, 28 % elongation and about 170 HB.
Reference datasheet — E7018 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
E7018 tempers and conditions
E7018 is supplied in 4 conditions, soft to hard. AW is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Stress relieved | Pick when the fabrication receives code-required PWHT (pressure vessels, thick restraint joints): slightly lower strength, higher ductility and lower residual stress. | 420 | 515 | 30 | 155 HB | — |
AWDefault As-welded deposit | Default condition for structural steelwork: deposit used straight from the arc with no post-weld heat treatment. | 450 | 540 | 28 | 170 HB | — |
≤4 mL/100 g diffusible hydrogen, moisture-resistant hermetic packaging | Use for high-restraint, thick-section or higher-strength steels where hydrogen cracking control is critical and re-baking is to be avoided. | 450 | 540 | 28 | 170 HB | 10 % IACS |
Improved low-temperature toughness version | Choose when the WPS demands 27 J at −46 °C or higher weld-metal ductility, e.g. offshore, bridge and low-temperature storage tanks. | 460 | 550 | 29 | 172 HB | 10 % IACS |
What is E7018?
E7018 is a low-hydrogen, iron-powder SMAW electrode from the AWS A5.1 family, also listed as J507, D5016, E5015 and E5018, depositing a C-Mn weld metal with 450 MPa yield, 540 MPa tensile, 28 % elongation and about 170 HB. Engineers specify it for structural and pressure work where crack resistance governs, because the low weld-metal hydrogen and good notch toughness suit thick, restrained joints and higher-carbon steels; supplied as coated stick electrodes, including E7018-1 and moisture-resistant H4R variants. It must be redried and held in a heated quiver, and deposits are rated to about 400 °C service. Where flat and horizontal fillet deposition speed matters more than toughness, E7024 is the usual alternative. E7018 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). E7018 has a yield strength of 450 MPa (65.3 ksi) and a tensile strength of 540 MPa (78.3 ksi) — stronger than 52% of steel grades. Elongation at break is 28% and the elastic modulus is 205 GPa (29.7 Msi).
What is E7018 used for?
- structural steel
- pressure vessels
- bridges
- heavy equipment repair
Advantages
- Readily welded — 95/100, better than 97% of steel grades
- Ductile — tolerates forming and impact — 28%, 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
- High electrical conductivity — 10 % IACS, better than 83% of steel grades
- Tough — resists crack growth — 120 MPa·√m (109.2 ksi·√in), better than 81% of steel grades
Limitations
- High embodied carbon — 2.6 kg CO₂/kg, worse than 87% of steel grades
E7018 properties
Typical room-temperature values for E7018-AW; bars are the position among steel grades.
Physical3
E7018 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).
Mechanical15
E7018 has a yield strength of 450 MPa (65.3 ksi) and a tensile strength of 540 MPa (78.3 ksi) — stronger than 52% of steel grades. Elongation at break is 28% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
E7018 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
E7018 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 E7018 takes about 33 MJ of energy and emits 2.6 kg of CO₂ — more than 76% of steel grades. Typical recycled content is 25%.
Manufacturability7
E7018's machinability is good (55/100, better than 62% of steel grades); weldability excellent (95/100); formability good (55/100).
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. E7018 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with E7018
Is E7018 easy to machine?
Weld deposit machines like a normalized C-Mn steel but slag inclusions and hard HAZ can chip carbide edges — grind the cap first and use rigid setups.
Can E7018 be welded?
AC or DCEP, short arc with drag technique, redry 260–430 °C / 1–2 h and keep in a 120 °C quiver; preheat/interpass per AWS D1.1 for thick or higher-carbon steel.
Can E7018 be formed, bent or molded?
Not a wrought product; deposit can be hammer/needle peened between passes for distortion control but should not be cold formed severely.
E7018 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 A5.1 undiluted weld metal limit | ≤ 0.15 | 0.06 |
| Mn | ≤ 1.6 | 1.1 |
| Si | ≤ 0.75 | 0.5 |
| P | ≤ 0.04 | 0.02 |
| S | ≤ 0.04 | 0.01 |
| Ni1.0 max for E7018-1 grades in some producer specs | ≤ 0.3 | 0.03 |
| Cr | ≤ 0.2 | 0.03 |
| Mo | ≤ 0.3 | 0.02 |
| V | ≤ 0.08 | 0.01 |
| Febalance, iron-powder bearing basic coating | balance |
What surface finishes work on E7018?
Remove slag completely, blast or grind before coating; accepts phosphating, zinc-rich primer, paint and hot-dip galvanizing like mild steel.
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 E7018 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- GB (China)
- J507E5015E5018
- JIS
- D5016
- Also called
- AWS E7018
How much does E7018 cost?
E7018 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.
E7018 — frequently asked
What is E7018 used for?
E7018 is typically used for structural steel, pressure vessels, bridges and heavy equipment repair. In short: low-hydrogen structural standard; best toughness among stick electrodes; requires redry and quiver.
What is the yield strength of E7018?
E7018 has a typical yield strength of 450 MPa (65.3 ksi) and a tensile strength of 540 MPa (78.3 ksi) — stronger than 52% of steel grades. Strength varies by condition: see the 4 listed tempers.
Is E7018 easy to machine?
Reasonably — machinability is rated good (55/100, better than 62% of steel grades). Weld deposit machines like a normalized C-Mn steel but slag inclusions and hard HAZ can chip carbide edges — grind the cap first and use rigid setups.
Can E7018 be welded?
Yes — weldability is rated excellent (95/100). AC or DCEP, short arc with drag technique, redry 260–430 °C / 1–2 h and keep in a 120 °C quiver; preheat/interpass per AWS D1.1 for thick or higher-carbon steel.
What surface finishes work on E7018?
Remove slag completely, blast or grind before coating; accepts phosphating, zinc-rich primer, paint and hot-dip galvanizing like mild steel.
Can E7018 be formed, bent or molded?
Not a wrought product; deposit can be hammer/needle peened between passes for distortion control but should not be cold formed severely.
What is the maximum service temperature of E7018?
E7018 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 E7018-AW and E7018-SR?
AW is the default condition — default condition for structural steelwork: deposit used straight from the arc with no post-weld heat treatment. SR: pick when the fabrication receives code-required PWHT (pressure vessels, thick restraint joints): slightly lower strength, higher ductility and lower residual stress. Yield strength is 450 MPa in AW versus 420 MPa in SR.
How much does E7018 cost?
E7018 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 A5.1/A5.1M — Carbon Steel Electrodes for Shielded Metal Arc Welding — American Welding Society (2012)
- AWS D1.1/D1.1M Structural Welding Code — Steel — American Welding Society (2020)
- ASM Handbook Vol.6 — Welding, Brazing and Soldering — ASM International (1993)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels — ASM International (1990)
- Low-hydrogen SMAW electrode datasheets (Lincoln Excalibur 7018, ESAB Atom Arc 7018, CHE507) — Lincoln Electric / ESAB / (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.