Stainless Steel ER349 AS-WELDED
Other · default condition
UNS S34980
Default condition: properties of the undiluted deposit as laid down by TIG/MIG without any post-weld heat treatment.
Values for the AS-WELDED condition
Other ER349 tempers and conditions
ER349 is listed in 3 conditions; see the grade overview at ER349.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution Annealed weld metal | Use when the whole fabrication is solution treated after welding to homogenize the deposit and maximize ductility/corrosion resistance. | 380 | 660 | 40 | 185 HB | 2.2 % IACS |
As Welded + Stress Relieved | Pick when residual stress or distortion must be reduced on stabilized 349-type assemblies while keeping most of the as-welded strength. | 470 | 720 | 33 | 215 HB | 2.2 % IACS |
AS-WELDEDDefaultThis page undiluted all-weld-metal deposit (GTAW/GMAW) | Default condition: properties of the undiluted deposit as laid down by TIG/MIG without any post-weld heat treatment. | 520 | 760 | 30 | 230 HB | — |
What is ER349 AS-WELDED?
ER349 AS-WELDED is ER349 in the AS-WELDED condition — default condition: properties of the undiluted deposit as laid down by TIG/MIG without any post-weld heat treatment. ER349 AS-WELDED has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 79% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 197 GPa (28.6 Msi). ER349 AS-WELDED has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Advantages
- High strength — 520 MPa (75.4 ksi), better than 79% of stainless steel grades
- High service temperature — 815°C (1,499 °F), better than 77% of stainless steel grades
ER349 AS-WELDED properties
Typical room-temperature values for ER349 AS-WELDED; 13 are specific to this condition. Other listed values are ER349 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
ER349 AS-WELDED has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Mechanical14
ER349 AS-WELDED has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 79% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 197 GPa (28.6 Msi).
Thermal6
ER349 AS-WELDED is rated for continuous service to 815°C (1,499 °F). It conducts heat at 15 W/m·K (8.67 BTU/hr·ft·°F), worse than 59% of stainless steel grades. Thermal expansion is 16.2 µm/m·K (9 µin/in·°F).
Electrical3
ER349 AS-WELDED conducts electricity at 2.2 % IACS, worse than 61% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), worse than 52% of stainless steel grades.
Sustainability4
Producing a kilogram of ER349 AS-WELDED takes about 65 MJ of energy and emits 4.5 kg of CO₂ — more than 79% of stainless steel grades. Typical recycled content is 40%.
Manufacturability7
ER349 AS-WELDED's machinability is poor (30/100, worse than 70% of stainless steel grades); weldability very good (70/100); 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 ER349 AS-WELDED
Is ER349 easy to machine?
Machine the deposit like a high-strength austenitic stainless: rigid setup, sharp carbide, positive rake, heavy feed and flood coolant to avoid work hardening and glazing.
Can ER349 be welded?
Use for GTAW/GMAW/SAW on 349-type and stabilized austenitic stainless; keep interpass temperature low, moderate heat input and 4–10 FN ferrite to limit hot cracking, and use pure Ar (TIG) or Ar+1–2% O₂/CO₂ (MIG) with good back-purging.
Can ER349 be formed, bent or molded?
Supplied as cold-drawn wire; the weld deposit itself is strong and work-hardens rapidly, so limit cold straightening or bending of welded joints and anneal if heavy forming follows.
What surface finishes work on ER349?
Pickle and passivate or mechanically blend weld beads; do not anodize — electropolishing or glass-bead/abrasive blending plus passivation restores the chromium oxide film.
ER349 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 | 0.07 – 0.13 | 0.1 |
| Cr | 19 – 21.5 | 20 |
| Ni | 8 – 9.5 | 8.8 |
| Mo | 0.35 – 0.65 | 0.5 |
| W | 1.25 – 1.75 | 1.5 |
| Nb+Tacolumbium plus tantalum, stabilizer | 1 – 1.4 | 1.2 |
| Ti | 0.1 – 0.3 | 0.2 |
| Mn | 1 – 2.5 | 1.6 |
| Si | ≤ 0.65 | 0.4 |
| Cu | ≤ 0.75 | 0.15 |
| P | ≤ 0.03 | 0.02 |
| S | ≤ 0.03 | 0.01 |
| Fe | balance | — |
ER349 AS-WELDED — frequently asked
What is ER349 AS-WELDED used for?
ER349 AS-WELDED is typically used for high-temperature stabilized stainless welds, turbine and jet engine component repair, hot-section ducting and manifold joints, furnace fixtures and heat-treat baskets, stabilized stainless pressure parts operating above 550 °C and overlay on 349-type and stabilized austenitic base metal. In short: strongest stabilized austenitic filler; creep resistance to 815 °C; ta/Nb dual stabilization.
What is the yield strength of ER349 AS-WELDED?
ER349 AS-WELDED has a typical yield strength of 520 MPa (75.4 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 79% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is ER349 AS-WELDED easy to machine?
Not especially — machinability is rated poor (30/100, worse than 70% of stainless steel grades). Machine the deposit like a high-strength austenitic stainless: rigid setup, sharp carbide, positive rake, heavy feed and flood coolant to avoid work hardening and glazing.
Can ER349 AS-WELDED be welded?
Yes — weldability is rated very good (70/100). Use for GTAW/GMAW/SAW on 349-type and stabilized austenitic stainless; keep interpass temperature low, moderate heat input and 4–10 FN ferrite to limit hot cracking, and use pure Ar (TIG) or Ar+1–2% O₂/CO₂ (MIG) with good back-purging.
What surface finishes work on ER349 AS-WELDED?
Pickle and passivate or mechanically blend weld beads; do not anodize — electropolishing or glass-bead/abrasive blending plus passivation restores the chromium oxide film.
Can ER349 AS-WELDED be formed, bent or molded?
Supplied as cold-drawn wire; the weld deposit itself is strong and work-hardens rapidly, so limit cold straightening or bending of welded joints and anneal if heavy forming follows.
What is the maximum service temperature of ER349 AS-WELDED?
ER349 AS-WELDED 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 ER349 AS-WELDED and ER349 SOL-ANN?
AS-WELDED is the default condition — default condition: properties of the undiluted deposit as laid down by TIG/MIG without any post-weld heat treatment. SOL-ANN: use when the whole fabrication is solution treated after welding to homogenize the deposit and maximize ductility/corrosion resistance. Yield strength is 520 MPa in AS-WELDED versus 380 MPa in SOL-ANN.
Sources
- AWS A5.9/A5.9M — Bare Stainless Steel Welding Electrodes and Rods — American Welding Society (2017)
- ASTM A959 / UNS S34980 designation listing — ASTM / SAE-ASTM Unified Numbering System (2019)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.6 — Welding, Brazing, and Soldering — ASM International (1993)
- Stainless steel filler metal datasheets (349/347 stabilized types) — Various 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.