Stainless Steel E430 PWHT
Heat-treated state
EN E430 · UNS W43010
PWHT = post-weld heat treated
Standard qualification/service condition: tempers HAZ martensite, restores ductility, toughness and corrosion behaviour.
Values for the PWHT condition
Other E430 tempers and conditions
E430 is listed in 7 conditions; see the grade overview at E430.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
PWHTThis page Post-weld heat treated | Standard qualification/service condition: tempers HAZ martensite, restores ductility, toughness and corrosion behaviour. | 380 | 500 | 24 | 175 HB | 2.9 % IACS |
Lime (basic) coated electrode, DCEP only, low hydrogen | Pick when low diffusible hydrogen and better weld-metal toughness/crack resistance are needed on thicker or restrained ferritic joints. | 395 | 510 | 23 | 180 HB | 2.9 % IACS |
Heavy lime coating, DCEP, flat/horizontal-fillet only, high deposition | For high-deposition flat-position welding and surfacing of heavier 430 sections. | 395 | 510 | 22 | 185 HB | 2.9 % IACS |
E430-16Default Titania (rutile-lime) coated electrode, AC or DCEP, all positions | The standard stocked E430 electrode: smooth arc, easy slag removal, AC-capable, used for most decorative and appliance repairs. | 400 | 520 | 22 | 185 HB | 2.9 % IACS |
Heavy titania coating, AC/DCEP, flat/horizontal-fillet only, high… | AC-capable high-recovery version of -25 for productive flat-position fillet welding and cladding. | 400 | 515 | 22 | 188 HB | 2.9 % IACS |
Silica-rutile (acid-rutile) coated electrode, AC/DCEP | Choose for the smoothest bead appearance and finest ripple on thin decorative sheet; slightly lower toughness than -15. | 405 | 525 | 21 | 190 HB | 2.9 % IACS |
As-welded deposit | Condition of the joint if PWHT is skipped: higher strength and hardness from untempered martensite, but low ductility and toughness. | 470 | 590 | 10 | 22 HRC | 2.8 % IACS |
What is E430 PWHT?
E430 PWHT is E430 heat treated to PWHT — standard qualification/service condition: tempers HAZ martensite, restores ductility, toughness and corrosion behaviour. E430 PWHT has a yield strength of 380 MPa (55.1 ksi) and a tensile strength of 500 MPa (72.5 ksi) — stronger than 52% of stainless steel grades. Elongation at break is 24% and the elastic modulus is 200 GPa (29 Msi). E430 PWHT has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,425°C (2,597 °F). E430-16 is the default condition FabDigit quotes; PWHT is available on request or by drawing note.
Advantages
- Low embodied carbon — 3 kg CO₂/kg, better than 97% of stainless steel grades
- Easy to machine — 48/100, better than 88% of stainless steel grades
- High electrical conductivity — 2.9 % IACS, better than 87% of stainless steel grades
- Conducts heat well — 24.2 W/m·K (14 BTU/hr·ft·°F), better than 83% of stainless steel grades
Limitations
- Low fracture toughness — 60 MPa·√m (54.6 ksi·√in), worse than 88% of stainless steel grades
- Needs corrosion protection — 47/100, worse than 81% of stainless steel grades
E430 PWHT properties
Typical room-temperature values for E430 PWHT; 22 are specific to this condition. Other listed values are E430 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
E430 PWHT has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,425°C (2,597 °F).
Mechanical16
E430 PWHT has a yield strength of 380 MPa (55.1 ksi) and a tensile strength of 500 MPa (72.5 ksi) — stronger than 52% of stainless steel grades. Elongation at break is 24% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
E430 PWHT is rated for continuous service to 800°C (1,472 °F). It conducts heat at 24.2 W/m·K (14 BTU/hr·ft·°F), better than 83% of stainless steel grades. Thermal expansion is 10.4 µm/m·K (5.78 µin/in·°F).
Electrical3
E430 PWHT conducts electricity at 2.9 % IACS, better than 87% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is fair (47/100), worse than 81% of stainless steel grades.
Sustainability4
Producing a kilogram of E430 PWHT takes about 38 MJ of energy and emits 3 kg of CO₂ — less than 99% of stainless steel grades. Typical recycled content is 65%.
Manufacturability6
E430 PWHT's machinability is fair (48/100, better than 88% of stainless steel grades); weldability good (58/100); formability fair (40/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with E430 PWHT
Is E430 easy to machine?
Weld deposit machines like annealed Type 430 (~50 % of 1212) after PWHT; in the as-welded state hard martensitic HAZ dulls tools — anneal first.
Can E430 be welded?
Preheat 150–260 °C, keep interpass moderate, use short arc and stringer beads, then anneal 760–790 °C and furnace cool; redry electrodes 250–300 °C before use.
Can E430 be formed, bent or molded?
Deposited joints tolerate only limited cold forming; ferritic weld metal is notch-sensitive at room temperature so avoid bending as-welded.
What surface finishes work on E430?
Grinds and polishes to a bright finish that colour-matches 430 sheet; passivate after grinding, and avoid carbon-steel contamination to prevent rust staining.
E430 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 A5.4 undiluted weld metal | ≤ 0.1 | 0.06 |
| Cr | 15 – 18 | 16.5 |
| Ni | ≤ 0.6 | 0.3 |
| Mo | ≤ 0.75 | 0.2 |
| Mn | ≤ 1 | 0.6 |
| Si | ≤ 0.9 | 0.5 |
| P | ≤ 0.04 | 0.02 |
| S | ≤ 0.03 | 0.02 |
| Cu | ≤ 0.75 | 0.1 |
| Fe | balance | — |
E430 PWHT — frequently asked
What is E430 PWHT used for?
E430 PWHT is typically used for kitchen equipment fabrication, architectural trim welding, automotive trim repair and mild acid resistant tanks. In short: colour-matches 430 sheet; low-cost ferritic electrode; needs preheat and anneal.
What is the yield strength of E430 PWHT?
E430 PWHT has a typical yield strength of 380 MPa (55.1 ksi) and a tensile strength of 500 MPa (72.5 ksi) — stronger than 52% of stainless steel grades. Strength varies by condition: see the 7 listed tempers.
Is E430 PWHT easy to machine?
Reasonably — machinability is rated fair (48/100, better than 88% of stainless steel grades). Weld deposit machines like annealed Type 430 (~50 % of 1212) after PWHT; in the as-welded state hard martensitic HAZ dulls tools — anneal first.
Can E430 PWHT be welded?
Yes — weldability is rated good (58/100). Preheat 150–260 °C, keep interpass moderate, use short arc and stringer beads, then anneal 760–790 °C and furnace cool; redry electrodes 250–300 °C before use.
What surface finishes work on E430 PWHT?
Grinds and polishes to a bright finish that colour-matches 430 sheet; passivate after grinding, and avoid carbon-steel contamination to prevent rust staining.
Can E430 PWHT be formed, bent or molded?
Deposited joints tolerate only limited cold forming; ferritic weld metal is notch-sensitive at room temperature so avoid bending as-welded.
What is the maximum service temperature of E430 PWHT?
E430 PWHT is rated for continuous use to about 800°C (1,472 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between E430-16 and E430-AW?
E430-16 is the default condition — the standard stocked E430 electrode: smooth arc, easy slag removal, AC-capable, used for most decorative and appliance repairs. AW: condition of the joint if PWHT is skipped: higher strength and hardness from untempered martensite, but low ductility and toughness. Yield strength is 400 MPa in E430-16 versus 470 MPa in AW.
Sources
- AWS A5.4/A5.4M — Stainless Steel Electrodes for Shielded Metal Arc Welding — American Welding Society (2012)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels — ASM International (1990)
- ASM Handbook Vol.6 — Welding, Brazing and Soldering — ASM International (1993)
- Stainless SMAW electrode datasheets (E430-16/-15) — Lincoln Electric / ESAB / (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.