Stainless Steel ER430LNb-AW (As-welded deposit)
Heat-treated state · default condition
Standard condition for thin-section exhaust, trim and heat-exchanger joints where no PWHT is applied.
Values for the AW condition
Other ER430LNb tempers and conditions
ER430LNb is listed in 2 conditions; see the grade overview at ER430LNb.
- PWHT760
- AW
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
PWHT / Annealed | Choose when maximum weld ductility and toughness are needed on thicker ferritic sections or before severe forming. | 320 | 470 | 28 | 160 HB | 3 % IACS |
AWDefaultThis page As-welded deposit | Standard condition for thin-section exhaust, trim and heat-exchanger joints where no PWHT is applied. | 380 | 520 | 24 | 10 HRC | 2.9 % IACS |
What is ER430LNb-AW?
ER430LNb-AW is ER430LNb heat treated to AW — standard condition for thin-section exhaust, trim and heat-exchanger joints where no PWHT is applied. ER430LNb-AW has a yield strength of 380 MPa (55.1 ksi) and a tensile strength of 520 MPa (75.4 ksi) — stronger than 52% of stainless steel grades. Elongation at break is 24% and the elastic modulus is 200 GPa (29 Msi). ER430LNb-AW 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).
Advantages
- Conducts heat well — 25 W/m·K (14.4 BTU/hr·ft·°F), better than 93% of stainless steel grades
- Easy to machine — 50/100, better than 90% of stainless steel grades
- High electrical conductivity — 2.9 % IACS, better than 87% of stainless steel grades
- Low embodied carbon — 3.6 kg CO₂/kg, better than 83% of stainless steel grades
- Readily welded — 80/100, better than 80% of stainless steel grades
Limitations
- Low fracture toughness — 50 MPa·√m (45.5 ksi·√in), worse than 92% of stainless steel grades
- Needs corrosion protection — 48/100, worse than 80% of stainless steel grades
ER430LNb-AW properties
Typical room-temperature values for ER430LNb-AW; 23 are specific to this condition. Other listed values are ER430LNb reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
ER430LNb-AW 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).
Mechanical17
ER430LNb-AW has a yield strength of 380 MPa (55.1 ksi) and a tensile strength of 520 MPa (75.4 ksi) — stronger than 52% of stainless steel grades. Elongation at break is 24% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
ER430LNb-AW is rated for continuous service to 815°C (1,499 °F). It conducts heat at 25 W/m·K (14.4 BTU/hr·ft·°F), better than 93% of stainless steel grades. Thermal expansion is 10.4 µm/m·K (5.78 µin/in·°F).
Electrical3
ER430LNb-AW conducts electricity at 2.9 % IACS, better than 87% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is fair (48/100), worse than 80% of stainless steel grades.
Sustainability4
Producing a kilogram of ER430LNb-AW takes about 50 MJ of energy and emits 3.6 kg of CO₂ — less than 80% of stainless steel grades. Typical recycled content is 65%.
Manufacturability7
ER430LNb-AW's machinability is fair (50/100, better than 90% of stainless steel grades); weldability very good (80/100); formability good (55/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with ER430LNb-AW
Is ER430LNb easy to machine?
Weld deposits machine like Type 430 — moderate rates, sharp carbide tools, positive rake and rigid setup to avoid work-hardened smearing.
Can ER430LNb be welded?
Use GTAW/GMAW with Ar or Ar+2%O2/CO2-lean mixes, low heat input, interpass ≤150 °C; preheat 100–200 °C on sections over ~5 mm to avoid coarse-grain brittleness.
Can ER430LNb be formed, bent or molded?
Weld metal has lower ductility than the ferritic base; keep bend radii generous or anneal at 760–815 °C before severe forming.
What surface finishes work on ER430LNb?
Pickle/passivate or bead-blast after welding to restore the chromium oxide film; takes the same brushed or polished finish as 430 sheet, but never anodize.
ER430LNb 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 |
|---|---|---|
| Clow-carbon, limits sensitization | ≤ 0.03 | 0.02 |
| Cr | 15.5 – 17.5 | 16.5 |
| Nbstabilizer, commonly ≥10×(C+N) | 0.3 – 1 | 0.55 |
| Mn | ≤ 0.6 | 0.4 |
| Si | ≤ 0.5 | 0.35 |
| Ni | ≤ 0.6 | 0.25 |
| Mo | ≤ 0.75 | 0.1 |
| Cu | ≤ 0.75 | 0.1 |
| N | ≤ 0.03 | 0.02 |
| P | ≤ 0.03 | 0.02 |
| S | ≤ 0.03 | 0.01 |
| Fe | balance | — |
ER430LNb-AW — frequently asked
What is ER430LNb-AW used for?
ER430LNb-AW is typically used for appliance and automotive trim welding of stabilized ferritics, automotive exhaust system sheet welds, stabilized ferritic sheet joints (409/439/430Ti), appliance panel and enclosure fabrication, hot-air ducting and heat shields and colour-matched decorative welds on ferritic sheet. In short: stabilized, sensitization-resistant ferritic; more ductile than ER430; 815 °C oxidation service.
What is the yield strength of ER430LNb-AW?
ER430LNb-AW has a typical yield strength of 380 MPa (55.1 ksi) and a tensile strength of 520 MPa (75.4 ksi) — stronger than 52% of stainless steel grades. Strength varies by condition: see the 2 listed tempers.
Is ER430LNb-AW easy to machine?
Reasonably — machinability is rated fair (50/100, better than 90% of stainless steel grades). Weld deposits machine like Type 430 — moderate rates, sharp carbide tools, positive rake and rigid setup to avoid work-hardened smearing.
Can ER430LNb-AW be welded?
Yes — weldability is rated very good (80/100). Use GTAW/GMAW with Ar or Ar+2%O2/CO2-lean mixes, low heat input, interpass ≤150 °C; preheat 100–200 °C on sections over ~5 mm to avoid coarse-grain brittleness.
What surface finishes work on ER430LNb-AW?
Pickle/passivate or bead-blast after welding to restore the chromium oxide film; takes the same brushed or polished finish as 430 sheet, but never anodize.
Can ER430LNb-AW be formed, bent or molded?
Weld metal has lower ductility than the ferritic base; keep bend radii generous or anneal at 760–815 °C before severe forming.
What is the maximum service temperature of ER430LNb-AW?
ER430LNb-AW is rated for continuous use to about 815°C (1,499 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between ER430LNb-AW and ER430LNb PWHT760?
AW is the default condition — standard condition for thin-section exhaust, trim and heat-exchanger joints where no PWHT is applied. PWHT760: choose when maximum weld ductility and toughness are needed on thicker ferritic sections or before severe forming. Yield strength is 380 MPa in AW versus 320 MPa in PWHT760.
Sources
- AWS A5.9/A5.9M — Bare Stainless Steel Welding Electrodes and Rods — American Welding Society (2017)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.6 — Welding, Brazing and Soldering (ferritic stainless steels) — ASM International (1993)
- ASM Handbook Vol.13B — Corrosion: Materials — ASM International (2005)
- Ferritic stainless filler metal datasheets (ER430LNb / 430LNb class) — Various welding consumable 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.