Stainless Steel E310H-15
Grade
UNS W31015
E310H-15 = lime (basic) coated electrode, DCEP only
Pick the basic-coated version for out-of-position work and maximum crack resistance on heavily restrained heat-resistant castings.
Values for the E310H-15 condition
Other E310H tempers and conditions
E310H is listed in 4 conditions; see the grade overview at E310H.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
solution annealed ~1100 °C + rapid cool (weldment) | Used only when the welded casting is re-solution treated to dissolve carbides and restore ductility before service. | 340 | 610 | 25 | 175 HB | 2.3 % IACS |
Titania (rutile) coated electrode, AC or DCEP | Pick the rutile-coated version for smoother arc, better bead appearance and easy slag release with AC power sources. | 425 | 655 | 15 | 205 HB | 2.2 % IACS |
AWDefault As-welded deposit | Standard condition in which E310H deposits are tested and used; no post-weld heat treatment applied. | 430 | 660 | 16 | 200 HB | 2.2 % IACS |
E310H-15This page Lime (basic) coated electrode, DCEP only | Pick the basic-coated version for out-of-position work and maximum crack resistance on heavily restrained heat-resistant castings. | 440 | 670 | 17 | 200 HB | 2.2 % IACS |
What is E310H-15?
E310H-15 is E310H in the E310H-15 grade — pick the basic-coated version for out-of-position work and maximum crack resistance on heavily restrained heat-resistant castings. E310H-15 has a yield strength of 440 MPa (63.8 ksi) and a tensile strength of 670 MPa (97.2 ksi) — stronger than 68% of stainless steel grades. Elongation at break is 17% and the elastic modulus is 195 GPa (28.3 Msi). E310H-15 has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,330°C (2,426 °F). AW is the default condition FabDigit quotes; E310H-15 is available on request or by drawing note.
Advantages
- High service temperature — 1,100°C (2,012 °F), better than 96% of stainless steel grades
Limitations
- Hard to polish — 55/100, worse than 89% of stainless steel grades
- Limited ductility — 17%, worse than 86% of stainless steel grades
- Limited formability — 20/100, worse than 86% of stainless steel grades
- High embodied carbon — 5.6 kg CO₂/kg, worse than 83% of stainless steel grades
E310H-15 properties
Typical room-temperature values for E310H-15; 22 are specific to this condition. Other listed values are E310H reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
E310H-15 has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,330°C (2,426 °F).
Mechanical16
E310H-15 has a yield strength of 440 MPa (63.8 ksi) and a tensile strength of 670 MPa (97.2 ksi) — stronger than 68% of stainless steel grades. Elongation at break is 17% and the elastic modulus is 195 GPa (28.3 Msi).
Thermal6
E310H-15 is rated for continuous service to 1,100°C (2,012 °F). It conducts heat at 14 W/m·K (8.09 BTU/hr·ft·°F), worse than 80% of stainless steel grades. Thermal expansion is 15.4 µm/m·K (8.56 µin/in·°F).
Electrical3
E310H-15 conducts electricity at 2.2 % IACS, worse than 61% of stainless steel grades.
Chemical & Environmental2
Corrosion resistance is good (62/100), worse than 52% of stainless steel grades.
Sustainability4
Producing a kilogram of E310H-15 takes about 65 MJ of energy and emits 5.6 kg of CO₂ — more than 79% of stainless steel grades. Typical recycled content is 45%.
Manufacturability7
E310H-15's machinability is poor (28/100, worse than 79% of stainless steel grades); weldability good (60/100); formability poor (20/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with E310H-15
Is E310H easy to machine?
Machine deposits with sharp carbide tooling, low speed, heavy positive feed and flood coolant — the fully austenitic, carbide-bearing metal work-hardens fast and smears.
Can E310H be welded?
Redry electrodes (about 250–300 °C), weld with short arc and stringer beads, keep interpass temperature low and heat input modest to limit hot cracking; no preheat needed on austenitic base metal but preheat heat-resistant castings per their spec.
Can E310H be formed, bent or molded?
Not a wrought product — deposit shaping is by weld sequencing and grinding; cold straightening of weldments should be avoided because as-welded ductility is limited.
What surface finishes work on E310H?
Grind or pickle/passivate to remove slag, oxide and heat tint; deposits polish to a moderate finish but do not colour-match low-carbon 310 weld metal after high-temperature service.
E310H 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 |
|---|---|---|
| Craised carbon for creep strength | 0.35 – 0.45 | 0.4 |
| Cr | 25 – 28 | 26.5 |
| Ni | 20 – 22.5 | 21 |
| Mn | 1 – 2.5 | 1.8 |
| Si | ≤ 0.75 | 0.5 |
| Moresidual | ≤ 0.75 | — |
| Curesidual | ≤ 0.75 | — |
| P | ≤ 0.03 | — |
| S | ≤ 0.03 | — |
| Fe | balance | — |
E310H-15 — frequently asked
What is E310H-15 used for?
E310H-15 is typically used for high-temperature furnace components, boiler support structures and radiant tube welding. In short: creep-strength 310 electrode; service to 1100 °C; higher carbon than E310.
What is the yield strength of E310H-15?
E310H-15 has a typical yield strength of 440 MPa (63.8 ksi) and a tensile strength of 670 MPa (97.2 ksi) — stronger than 68% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is E310H-15 easy to machine?
Not especially — machinability is rated poor (28/100, worse than 79% of stainless steel grades). Machine deposits with sharp carbide tooling, low speed, heavy positive feed and flood coolant — the fully austenitic, carbide-bearing metal work-hardens fast and smears.
Can E310H-15 be welded?
Yes — weldability is rated good (60/100). Redry electrodes (about 250–300 °C), weld with short arc and stringer beads, keep interpass temperature low and heat input modest to limit hot cracking; no preheat needed on austenitic base metal but preheat heat-resistant castings per their spec.
What surface finishes work on E310H-15?
Grind or pickle/passivate to remove slag, oxide and heat tint; deposits polish to a moderate finish but do not colour-match low-carbon 310 weld metal after high-temperature service.
Can E310H-15 be formed, bent or molded?
Not a wrought product — deposit shaping is by weld sequencing and grinding; cold straightening of weldments should be avoided because as-welded ductility is limited.
What is the maximum service temperature of E310H-15?
E310H-15 is rated for continuous use to about 1,100°C (2,012 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- AWS A5.4/A5.4M — Specification for Stainless Steel Electrodes for Shielded Metal Arc Welding — AWS (2012)
- ASME BPVC Section II Part C — SFA-5.4 — ASME (2023)
- ASM Handbook Vol.6 — Welding, Brazing and Soldering — ASM International (1993)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- Stainless covered electrode 310H product data — Böhler Welding / 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.