Stainless Steel ER430LNb
ER430LNb is a low-carbon, niobium-stabilized ferritic stainless filler wire in the 430 family, with the Nb addition tying up carbon to reduce sensitization.
Reference datasheet — ER430LNb 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
ER430LNb tempers and conditions
ER430LNb is supplied in 2 conditions, soft to hard. AW is the default FabDigit quotes; the values on this page are for it.
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 |
AWDefault 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 |
Supply forms, finishes and certifications
Ways ER430LNb is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
WIRE-CD | Cold Drawn Wire | Supply form |
What is ER430LNb?
ER430LNb is a low-carbon, niobium-stabilized ferritic stainless filler wire in the 430 family, with the Nb addition tying up carbon to reduce sensitization. It deposits more ductile weld metal than plain ER430 — about 380 MPa yield, 520 MPa tensile, 24% elongation and 185 HB (90 HRB) — and is supplied as cold-drawn wire for welding stabilized ferritic sheet in appliance and automotive trim. Oxidation service reaches about 815 °C, but toughness stays below austenitic fillers and heavier sections need preheat and low heat input. ER430 is the unstabilized alternative. ER430LNb 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). ER430LNb 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).
What is ER430LNb 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
- Colour-matched decorative welds on ferritic sheet
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 properties
Typical room-temperature values for ER430LNb-AW; bars are the position among stainless steel grades.
Physical3
ER430LNb 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 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 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 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 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'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. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the stainless steel family
Yield strength against density for every stainless steel grade FabDigit runs. ER430LNb is highlighted; hover a dot for its name, or open the interactive family chart.
Working with ER430LNb
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.
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 |
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.
Surface treatments FabDigit runs on stainless 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).
Passivation
Organic Coating
Thermal Spray
How much does ER430LNb cost?
ER430LNb is a premium-cost stainless steel ($$$), cheaper than about 51% 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.
ER430LNb — frequently asked
What is ER430LNb used for?
ER430LNb 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?
ER430LNb 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 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 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?
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 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?
ER430LNb 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.
How much does ER430LNb cost?
ER430LNb is a premium-cost stainless steel ($$$), cheaper than about 51% 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 A5.9/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; 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.