Steel EH14 PWHT
Heat-treated state
PWHT = post-weld heat treated
Choose when code-required stress relief is applied: strength drops slightly, toughness and dimensional stability improve.
Values for the PWHT condition
Other EH14 tempers and conditions
EH14 is listed in 2 conditions; see the grade overview at EH14.
- PWHT
- AW
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
PWHTThis page Post-weld heat treated | Choose when code-required stress relief is applied: strength drops slightly, toughness and dimensional stability improve. | 430 | 520 | 29 | 170 HB | 9.5 % IACS |
AWDefault As-welded deposit | Default condition: multi-pass SAW deposit tested as-welded per AWS A5.17; use for general structural and pressure-part welds without PWHT. | 460 | 550 | 27 | 185 HB | — |
What is EH14 PWHT?
EH14 PWHT is EH14 heat treated to PWHT — choose when code-required stress relief is applied: strength drops slightly, toughness and dimensional stability improve. EH14 PWHT has a yield strength of 430 MPa (62.4 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 51% of steel grades. Elongation at break is 29% and the elastic modulus is 205 GPa (29.7 Msi). EH14 PWHT has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,460°C (2,660 °F). AW is the default condition FabDigit quotes; PWHT is available on request or by drawing note.
Advantages
- Ductile — tolerates forming and impact — 29%, better than 91% of steel grades
- Tough — resists crack growth — 130 MPa·√m (118.3 ksi·√in), better than 89% of steel grades
- Readily welded — 88/100, better than 87% of steel grades
- High electrical conductivity — 9.5 % IACS, better than 75% of steel grades
Limitations
- Hard to polish — 45/100, worse than 84% of steel grades
EH14 PWHT properties
Typical room-temperature values for EH14 PWHT; 22 are specific to this condition. Other listed values are EH14 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
EH14 PWHT has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,460°C (2,660 °F).
Mechanical15
EH14 PWHT has a yield strength of 430 MPa (62.4 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 51% of steel grades. Elongation at break is 29% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
EH14 PWHT is rated for continuous service to 425°C (797 °F). It conducts heat at 46 W/m·K (26.6 BTU/hr·ft·°F), better than 71% of steel grades. Thermal expansion is 12.2 µm/m·K (6.78 µin/in·°F).
Electrical3
EH14 PWHT conducts electricity at 9.5 % IACS, better than 75% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of EH14 PWHT takes about 28 MJ of energy and emits 2.2 kg of CO₂ — less than 56% of steel grades. Typical recycled content is 30%.
Manufacturability7
EH14 PWHT's machinability is good (60/100, better than 83% of steel grades); weldability excellent (88/100); formability good (60/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with EH14 PWHT
Is EH14 easy to machine?
Deposit machines like normalized C-Mn steel (~60 % of AISI 1212); grind or mill weld caps with sharp carbide and expect harder HAZ zones on thick sections.
Can EH14 be welded?
Designed for submerged arc (single, tandem or multi-wire) with neutral to slightly basic flux; DCEP for most work, keep interpass ≤250 °C and match flux to required CVN class.
Can EH14 be formed, bent or molded?
Supplied as cold-drawn copper-coated wire — keep cast/helix within spec, store dry to avoid rust and hydrogen pickup in the weld.
What surface finishes work on EH14?
Weld metal rusts as fast as mild steel: blast, prime and paint, or hot-dip galvanize the assembly; no anodizing possible.
EH14 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 |
|---|---|---|
| C | 0.1 – 0.2 | 0.14 |
| Mnhigh-Mn class, compensates Mn loss to slag | 1.7 – 2.2 | 1.95 |
| Sideoxidation relies on flux | ≤ 0.1 | 0.05 |
| S | ≤ 0.03 | 0.02 |
| P | ≤ 0.03 | 0.02 |
| Cuincluding copper coating | ≤ 0.35 | 0.2 |
| Other (total)residual elements total | ≤ 0.5 | — |
| Fe | balance | — |
EH14 PWHT — frequently asked
What is EH14 PWHT used for?
EH14 PWHT is typically used for heavy plate submerged arc welding, pressure vessel fabrication and structural steel. In short: higher-manganese SAW wire; stronger deposit than EM12K; suits multi-wire high dilution.
What is the yield strength of EH14 PWHT?
EH14 PWHT has a typical yield strength of 430 MPa (62.4 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 51% of steel grades. Strength varies by condition: see the 2 listed tempers.
Is EH14 PWHT easy to machine?
Reasonably — machinability is rated good (60/100, better than 83% of steel grades). Deposit machines like normalized C-Mn steel (~60 % of AISI 1212); grind or mill weld caps with sharp carbide and expect harder HAZ zones on thick sections.
Can EH14 PWHT be welded?
Yes — weldability is rated excellent (88/100). Designed for submerged arc (single, tandem or multi-wire) with neutral to slightly basic flux; DCEP for most work, keep interpass ≤250 °C and match flux to required CVN class.
What surface finishes work on EH14 PWHT?
Weld metal rusts as fast as mild steel: blast, prime and paint, or hot-dip galvanize the assembly; no anodizing possible.
Can EH14 PWHT be formed, bent or molded?
Supplied as cold-drawn copper-coated wire — keep cast/helix within spec, store dry to avoid rust and hydrogen pickup in the weld.
What is the maximum service temperature of EH14 PWHT?
EH14 PWHT is rated for continuous use to about 425°C (797 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between EH14-AW and EH14 PWHT?
AW is the default condition — default condition: multi-pass SAW deposit tested as-welded per AWS A5.17; use for general structural and pressure-part welds without PWHT. PWHT: choose when code-required stress relief is applied: strength drops slightly, toughness and dimensional stability improve. Yield strength is 460 MPa in AW versus 430 MPa in PWHT.
Sources
- AWS A5.17/A5.17M — Carbon Steel Electrodes and Fluxes for Submerged Arc Welding — American Welding Society (2019)
- ASM Handbook Vol.6 — Welding, Brazing and Soldering — ASM International (1993)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels — ASM International (1990)
- SAW solid wire EH14 datasheets (Lincoln Electric / ESAB / ) — various producers (2023)
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.