Stainless Steel E310Nb-AW (As-welded deposit)
Heat-treated state · default condition
UNS W31017
Default condition: properties of the undiluted deposit in the as-welded state, as classified by AWS A5.4.
Values for the AW condition
Other E310Nb tempers and conditions
E310Nb is listed in 5 conditions; see the grade overview at E310Nb.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Post-weld heat treated | Used for overlays and vessel parts that are re-solution-annealed after welding: lower strength, higher ductility and toughness. | 300 | 570 | 42 | 160 HB | 2.2 % IACS |
E310Nb-17 | Choose for the flattest, best-wetting bead on flat/horizontal fillets and sheet; slightly more fluid slag than -16. | 415 | 595 | 30 | 185 HB | 2.2 % IACS |
AWDefaultThis page As-welded deposit | Default condition: properties of the undiluted deposit in the as-welded state, as classified by AWS A5.4. | 420 | 600 | 32 | 9 HRC | 2.2 % IACS |
E310Nb-16 | Most widely stocked coating: smooth arc on AC or DC, easy slag release, good bead appearance for general fabrication. | 420 | 600 | 30 | 185 HB | 2.2 % IACS |
E310Nb-15 | Pick for out-of-position work, heavy restraint or maximum weld-metal cleanliness/toughness; DC electrode positive only. | 430 | 610 | 33 | 180 HB | 2.2 % IACS |
What is E310Nb-AW?
E310Nb-AW is E310Nb heat treated to AW — default condition: properties of the undiluted deposit in the as-welded state, as classified by AWS A5.4. E310Nb-AW has a yield strength of 420 MPa (60.9 ksi) and a tensile strength of 600 MPa (87 ksi) — stronger than 64% of stainless steel grades. Elongation at break is 32% and the elastic modulus is 200 GPa (29 Msi). E310Nb-AW 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 service temperature — 1,050°C (1,922 °F), better than 91% of stainless steel grades
Limitations
- High embodied carbon — 6 kg CO₂/kg, worse than 88% of stainless steel grades
E310Nb-AW properties
Typical room-temperature values for E310Nb-AW; 24 are specific to this condition. Other listed values are E310Nb reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
E310Nb-AW 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).
Mechanical17
E310Nb-AW has a yield strength of 420 MPa (60.9 ksi) and a tensile strength of 600 MPa (87 ksi) — stronger than 64% of stainless steel grades. Elongation at break is 32% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
E310Nb-AW is rated for continuous service to 1,050°C (1,922 °F). It conducts heat at 14.2 W/m·K (8.2 BTU/hr·ft·°F), worse than 76% of stainless steel grades. Thermal expansion is 15.5 µm/m·K (8.61 µin/in·°F).
Electrical3
E310Nb-AW conducts electricity at 2.2 % IACS, worse than 61% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (66/100), better than 59% of stainless steel grades.
Sustainability4
Producing a kilogram of E310Nb-AW takes about 62 MJ of energy and emits 6 kg of CO₂ — more than 75% of stainless steel grades. Typical recycled content is 55%.
Manufacturability7
E310Nb-AW's machinability is poor (28/100, worse than 79% of stainless steel grades); weldability very good (72/100); formability fair (45/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with E310Nb-AW
Is E310Nb easy to machine?
Weld metal is tough and strongly work-hardening — use rigid setups, positive rake carbide, heavy feeds, low speeds and flood coolant; avoid dwelling.
Can E310Nb be welded?
SMAW with short arc, stringer beads, low heat input and interpass ≤150 °C; fully austenitic deposit is hot-crack prone, so keep dilution low, avoid weaving and re-dry electrodes (250–350 °C) before use.
Can E310Nb be formed, bent or molded?
Deposit is not intended for forming; grinding and light dressing only, expecting high springback and rapid work hardening if cold worked.
What surface finishes work on E310Nb?
Grind/blend with stainless-dedicated abrasives, then pickle and passivate per ASTM A380/A967; electropolishing gives good luster, no anodizing.
E310Nb 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 |
|---|---|---|
| Chigher C than 310L types, intentional for creep strength | ≤ 0.12 | 0.1 |
| Cr | 25 – 28 | 26.5 |
| Ni | 20 – 22 | 21 |
| Mn | 1 – 2.5 | 1.8 |
| Si | ≤ 0.75 | 0.45 |
| NbNb+Ta; carbide stabilizer (formerly written Cb) | 0.7 – 1 | 0.85 |
| Mo | ≤ 0.75 | 0.2 |
| Cu | ≤ 0.75 | 0.15 |
| P | ≤ 0.03 | 0.02 |
| S | ≤ 0.03 | 0.01 |
| Fe | balance | — |
E310Nb-AW — frequently asked
What is E310Nb-AW used for?
E310Nb-AW is typically used for stabilized fully-austenitic overlays, high-temperature fixtures and furnace component repair. In short: nb-stabilized 310 deposit; resists intergranular attack; overlay and repair electrode.
What is the yield strength of E310Nb-AW?
E310Nb-AW has a typical yield strength of 420 MPa (60.9 ksi) and a tensile strength of 600 MPa (87 ksi) — stronger than 64% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is E310Nb-AW easy to machine?
Not especially — machinability is rated poor (28/100, worse than 79% of stainless steel grades). Weld metal is tough and strongly work-hardening — use rigid setups, positive rake carbide, heavy feeds, low speeds and flood coolant; avoid dwelling.
Can E310Nb-AW be welded?
Yes — weldability is rated very good (72/100). SMAW with short arc, stringer beads, low heat input and interpass ≤150 °C; fully austenitic deposit is hot-crack prone, so keep dilution low, avoid weaving and re-dry electrodes (250–350 °C) before use.
What surface finishes work on E310Nb-AW?
Grind/blend with stainless-dedicated abrasives, then pickle and passivate per ASTM A380/A967; electropolishing gives good luster, no anodizing.
Can E310Nb-AW be formed, bent or molded?
Deposit is not intended for forming; grinding and light dressing only, expecting high springback and rapid work hardening if cold worked.
What is the maximum service temperature of E310Nb-AW?
E310Nb-AW is rated for continuous use to about 1,050°C (1,922 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between E310Nb-AW and E310Nb PWHT?
AW is the default condition — default condition: properties of the undiluted deposit in the as-welded state, as classified by AWS A5.4. PWHT: used for overlays and vessel parts that are re-solution-annealed after welding: lower strength, higher ductility and toughness. Yield strength is 420 MPa in AW versus 300 MPa in PWHT.
Sources
- AWS A5.4/A5.4M — Specification for Stainless Steel Electrodes for SMAW — American Welding Society (2012)
- ASM Handbook Vol.6 — Welding, Brazing and Soldering — ASM International (1993)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels — ASM International (1990)
- Stainless SMAW consumables — 310-type / 310Nb electrode data — ESAB / Böhler Welding (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.