Stainless Steel E330
EN E330 · UNS W88331
E330 is a heat-resistant austenitic filler matching Alloy 330 (N08330, W88331), a high-nickel, high-chromium composition selected for oxidation and carburization resistance rather than aqueous corrosion.
Reference datasheet — E330 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
E330 tempers and conditions
E330 is supplied in 6 conditions, soft to hard. AW is the default FabDigit quotes; the values on this page are for it.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Stress relieved | Use when carbides and residual stress from multi-pass welding must be dissolved before service; restores ductility but lowers strength slightly. | 320 | 560 | 40 | 160 HB | 1.7 % IACS |
AWDefault As-welded deposit | Default condition: properties of the undiluted as-deposited weld metal, no post-weld heat treatment. | 400 | 600 | 32 | 190 HB | 1.7 % IACS |
Lime (basic) coated electrode, DCEP only | Pick for out-of-position work and the cleanest, most crack-resistant deposit; DC electrode-positive only. | 400 | 595 | 33 | 185 HB | 1.7 % IACS |
Titania (rutile) coated electrode, AC or DCEP | Most commonly stocked coating type: smooth arc, easy slag release, AC-capable for general furnace fabrication. | 405 | 605 | 31 | 190 HB | 1.7 % IACS |
Silica-bearing rutile coating, AC or DCEP | Choose for the flattest bead profile and best appearance on flat/horizontal fillets; slightly more fluid slag than -16. | 410 | 610 | 30 | 195 HB | 1.7 % IACS |
High-carbon (0.35–0.45 % C) variant for maximum hot strength | Use where creep/hot strength above ~900 °C governs and room-temperature ductility can be sacrificed; avoid in carburizing service needing toughness. | 440 | 640 | 22 | 215 HB | 1.7 % IACS |
Supply forms, finishes and certifications
Ways E330 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
ER330 | Bare solid wire/rod for GTAW, GMAW and SAW | Surface finish |
What is E330?
E330 is a heat-resistant austenitic filler matching Alloy 330 (N08330, W88331), a high-nickel, high-chromium composition selected for oxidation and carburization resistance rather than aqueous corrosion. It is used for furnace, kiln and heat-treatment fixture fabrication and repair, and is supplied as -15, -16 and -17 coated electrodes plus ER330 rod. Deposit strength is 400 MPa yield and 600 MPa tensile with 32 % elongation and 190 HB (90 HRB), and service reaches 1100 °C. The ferrite-free deposit is hot-crack sensitive; where creep strength over long exposure matters, use the higher-carbon E330H. E330 has a density of 7.94 g/cm³ (0.287 lb/in³), heavier than 78% of stainless steel grades. It melts at 1,340°C (2,444 °F). E330 has a yield strength of 400 MPa (58 ksi) and a tensile strength of 600 MPa (87 ksi) — stronger than 57% of stainless steel grades. Elongation at break is 32% and the elastic modulus is 196 GPa (28.4 Msi).
What is E330 used for?
- furnace muffles
- heat-treating baskets and fixtures
- kiln components
Advantages
- High service temperature — 1,100°C (2,012 °F), better than 96% of stainless steel grades
Limitations
- High embodied carbon — 7 kg CO₂/kg, worse than 96% of stainless steel grades
- Low electrical conductivity — 1.7 % IACS, worse than 93% of stainless steel grades
- Poor heat conductor — 12.5 W/m·K (7.22 BTU/hr·ft·°F), worse than 90% of stainless steel grades
- Hard to polish — 55/100, worse than 89% of stainless steel grades
E330 properties
Typical room-temperature values for E330-AW; bars are the position among stainless steel grades.
Physical3
E330 has a density of 7.94 g/cm³ (0.287 lb/in³), heavier than 78% of stainless steel grades. It melts at 1,340°C (2,444 °F).
Mechanical15
E330 has a yield strength of 400 MPa (58 ksi) and a tensile strength of 600 MPa (87 ksi) — stronger than 57% of stainless steel grades. Elongation at break is 32% and the elastic modulus is 196 GPa (28.4 Msi).
Thermal5
E330 is rated for continuous service to 1,100°C (2,012 °F). It conducts heat at 12.5 W/m·K (7.22 BTU/hr·ft·°F), worse than 90% of stainless steel grades. Thermal expansion is 14.4 µm/m·K (8 µin/in·°F).
Electrical3
E330 conducts electricity at 1.7 % IACS, worse than 93% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (56/100), worse than 66% of stainless steel grades.
Sustainability4
Producing a kilogram of E330 takes about 95 MJ of energy and emits 7 kg of CO₂ — more than 96% of stainless steel grades. Typical recycled content is 40%.
Manufacturability7
E330's machinability is poor (26/100, worse than 84% of stainless steel grades); weldability good (55/100); formability fair (38/100).
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. E330 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with E330
Is E330 easy to machine?
Deposits machine like a high-nickel austenitic alloy — gummy and strongly work-hardening; use sharp positive-rake carbide, heavy feed, low speed and flood coolant, and expect grinding rather than turning for weld dressing.
Can E330 be welded?
Keep heat input and interpass temperature low (≤150 °C), use stringer beads and convex profiles, and dry basic electrodes at 250–300 °C — the ferrite-free deposit is hot-crack sensitive and dilution from carbon steel must be minimised.
Can E330 be formed, bent or molded?
Not a wrought product; weld beads can be peened or lightly cold worked, but heavy cold forming of the deposit risks cracking and a post-weld solution anneal is preferred.
E330 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 |
|---|---|---|
| CE330H variant: 0.35–0.45 % | 0.18 – 0.25 | 0.21 |
| Cr | 14 – 17 | 15.5 |
| Ni | 33 – 37 | 35 |
| Mn | 1 – 2.5 | 1.7 |
| SiER330 bare wire: 0.30–0.65 % | ≤ 0.9 | 0.6 |
| Moresidual only | ≤ 0.75 | |
| Curesidual only | ≤ 0.75 | |
| P | ≤ 0.04 | |
| S | ≤ 0.03 | |
| Febalance, nominally ~46 % | balance |
What surface finishes work on E330?
Pickle and passivate or abrasive-blast/wire-brush with stainless-only tools to remove heat tint; not anodizable, and painting is unnecessary for hot-gas service.
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
Equivalent designations
Standards and trade names that resolve to Stainless Steel E330 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- W88331
- Also called
- AWS A5.4 E330
- Similar grades
- N08330
How much does E330 cost?
E330 is a high-cost stainless steel ($$$$), pricier than about 78% 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.
E330 — frequently asked
What is E330 used for?
E330 is typically used for furnace muffles, heat-treating baskets and fixtures and kiln components. In short: 1100 °C oxidation resistance; alloy 330 matching filler; not for aqueous corrosion.
What is the yield strength of E330?
E330 has a typical yield strength of 400 MPa (58 ksi) and a tensile strength of 600 MPa (87 ksi) — stronger than 57% of stainless steel grades. Strength varies by condition: see the 6 listed tempers.
Is E330 easy to machine?
Not especially — machinability is rated poor (26/100, worse than 84% of stainless steel grades). Deposits machine like a high-nickel austenitic alloy — gummy and strongly work-hardening; use sharp positive-rake carbide, heavy feed, low speed and flood coolant, and expect grinding rather than turning for weld dressing.
Can E330 be welded?
Yes — weldability is rated good (55/100). Keep heat input and interpass temperature low (≤150 °C), use stringer beads and convex profiles, and dry basic electrodes at 250–300 °C — the ferrite-free deposit is hot-crack sensitive and dilution from carbon steel must be minimised.
What surface finishes work on E330?
Pickle and passivate or abrasive-blast/wire-brush with stainless-only tools to remove heat tint; not anodizable, and painting is unnecessary for hot-gas service.
Can E330 be formed, bent or molded?
Not a wrought product; weld beads can be peened or lightly cold worked, but heavy cold forming of the deposit risks cracking and a post-weld solution anneal is preferred.
What is the maximum service temperature of E330?
E330 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.
What is the difference between E330-AW and E330-SR?
AW is the default condition — default condition: properties of the undiluted as-deposited weld metal, no post-weld heat treatment. SR: use when carbides and residual stress from multi-pass welding must be dissolved before service; restores ductility but lowers strength slightly. Yield strength is 400 MPa in AW versus 320 MPa in SR.
How much does E330 cost?
E330 is a high-cost stainless steel ($$$$), pricier than about 78% 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 A5.4/A5.4M — Specification for Stainless Steel Electrodes for Shielded Metal Arc Welding — American Welding Society (2012)
- AWS A5.9/A5.9M — Specification for Bare Stainless Steel Welding Electrodes and Rods — American Welding Society (2017)
- ASTM B511 / B536 — Alloy N08330 (Alloy 330) castings and plate/sheet/strip — ASTM International (2018)
- 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)
- Alloy 330 (UNS N08330) heat-resistant alloy technical data — Rolled Alloys / Sandvik (2021)
- Stainless and heat-resistant covered electrode / filler metal catalogue (E330, ER330) — Böhler Welding / Lincoln Electric (2022)
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.