Stainless Steel CE30
ASTM CE30 · UNS J93423
CE30 is a 26Cr-9Ni cast stainless steel (UNS J93423) with a duplex-leaning austenitic-ferritic structure, used for elevated-temperature strength and oxidation resistance.
Reference datasheet — CE30 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 F condition
CE30 tempers and conditions
CE30 is supplied in 3 conditions, soft to hard. F is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution annealed | Pick when maximum ductility/toughness and freedom from carbide or sigma networks is required (e.g. A744 corrosion-service castings or parts to be welded). | 360 | 640 | 22 | 175 HB | 2.2 % IACS |
Homogenized / stress relieved | Used to relieve casting and weld-repair stresses on large or complex CE30 castings where full solution quenching would risk distortion. | 400 | 655 | 16 | 11 HRC | 2.2 % IACS |
FDefault As fabricated | Standard supply condition for CE30 — the ferrite network keeps intergranular corrosion resistance acceptable without solution annealing, and strength is highest. | 434 | 669 | 18 | 12 HRC | 2.2 % IACS |
What is CE30?
CE30 is a 26Cr-9Ni cast stainless steel (UNS J93423) with a duplex-leaning austenitic-ferritic structure, used for elevated-temperature strength and oxidation resistance. The high chromium and ferrite content give the highest room-temperature strength in this group — 434 MPa yield, 669 MPa tensile, 18 % elongation and about 190 HB — together with good oxidation resistance. Ductility is lower than the fully austenitic grades and service is limited to about 650 °C because sigma phase forms during long exposure between 550 and 850 °C. For higher-temperature duty, CH20 or CK20 are the alternatives. CE30 has a density of 7.72 g/cm³ (0.279 lb/in³), lighter than 72% of stainless steel grades. It melts at 1,400°C (2,552 °F). CE30 has a yield strength of 434 MPa (62.9 ksi) and a tensile strength of 669 MPa (97 ksi) — stronger than 67% of stainless steel grades. Elongation at break is 18% and the elastic modulus is 193 GPa (28 Msi).
What is CE30 used for?
- High-temperature furnace fixtures
- Heat treatment equipment
- Kiln components
Limitations
- Limited formability — 15/100, worse than 91% of stainless steel grades
- Hard to polish — 55/100, worse than 89% of stainless steel grades
- Low fracture toughness — 60 MPa·√m (54.6 ksi·√in), worse than 88% of stainless steel grades
- Limited ductility — 18%, worse than 83% of stainless steel grades
- Difficult to weld — 50/100, worse than 77% of stainless steel grades
CE30 properties
Typical room-temperature values for CE30-F; bars are the position among stainless steel grades.
Physical3
CE30 has a density of 7.72 g/cm³ (0.279 lb/in³), lighter than 72% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Mechanical17
CE30 has a yield strength of 434 MPa (62.9 ksi) and a tensile strength of 669 MPa (97 ksi) — stronger than 67% of stainless steel grades. Elongation at break is 18% and the elastic modulus is 193 GPa (28 Msi).
Thermal6
CE30 is rated for continuous service to 650°C (1,202 °F). It conducts heat at 16.2 W/m·K (9.36 BTU/hr·ft·°F), better than 64% of stainless steel grades. Thermal expansion is 15.5 µm/m·K (8.61 µin/in·°F).
Electrical3
CE30 conducts electricity at 2.2 % IACS, worse than 61% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is very good (72/100), better than 73% of stainless steel grades.
Sustainability4
Producing a kilogram of CE30 takes about 53 MJ of energy and emits 5 kg of CO₂ — less than 67% of stainless steel grades. Typical recycled content is 75%.
Manufacturability8
CE30's machinability is poor (33/100, worse than 57% of stainless steel grades); weldability fair (50/100); formability poor (15/100).
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. CE30 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with CE30
Is CE30 easy to machine?
Machine like a work-hardening duplex stainless: rigid setups, sharp carbide inserts, slow-to-moderate speeds, heavy positive feeds and copious coolant; hard carbides make tool wear high, so plan grinding for finish surfaces.
Can CE30 be welded?
Weldable with ER309/E309 or matching high-Cr filler; keep heat input low, interpass below ~150 °C and avoid 550–850 °C soaking to limit sigma and carbide embrittlement — solution treat and quench after major weld repair.
Can CE30 be formed, bent or molded?
Cast only (sand or investment); the ferrite content improves hot-tear resistance but heavy sections need generous risers and controlled solidification to avoid shrinkage porosity.
CE30 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 |
|---|---|---|
| Chigh carbon; carbides tolerated because of ferrite network | ≤ 0.3 | 0.25 |
| Mn | ≤ 1.5 | 1 |
| Si | ≤ 2 | 1.3 |
| P | ≤ 0.04 | |
| S | ≤ 0.04 | |
| Cr | 26 – 30 | 28 |
| Ni | 8 – 11 | 9.5 |
| Moresidual only unless CE-30 modified | ≤ 0.5 | |
| Fe | balance |
What surface finishes work on CE30?
Sand-blast/pickle then passivate in nitric acid; electropolishing gives the best surface, and the alloy holds a hard, oxidation-resistant scale rather than requiring paint or plating.
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 CE30 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- J93423
How much does CE30 cost?
CE30 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.
CE30 — frequently asked
What is CE30 used for?
CE30 is typically used for high-temperature furnace fixtures, heat treatment equipment and kiln components. In short: strongest grade in family; 26Cr austenitic-ferritic structure; service limited to 650 °C.
What is the yield strength of CE30?
CE30 has a typical yield strength of 434 MPa (62.9 ksi) and a tensile strength of 669 MPa (97 ksi) — stronger than 67% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is CE30 easy to machine?
Not especially — machinability is rated poor (33/100, worse than 57% of stainless steel grades). Machine like a work-hardening duplex stainless: rigid setups, sharp carbide inserts, slow-to-moderate speeds, heavy positive feeds and copious coolant; hard carbides make tool wear high, so plan grinding for finish surfaces.
Can CE30 be welded?
With care — weldability is rated fair (50/100). Weldable with ER309/E309 or matching high-Cr filler; keep heat input low, interpass below ~150 °C and avoid 550–850 °C soaking to limit sigma and carbide embrittlement — solution treat and quench after major weld repair.
What surface finishes work on CE30?
Sand-blast/pickle then passivate in nitric acid; electropolishing gives the best surface, and the alloy holds a hard, oxidation-resistant scale rather than requiring paint or plating.
Can CE30 be formed, bent or molded?
Cast only (sand or investment); the ferrite content improves hot-tear resistance but heavy sections need generous risers and controlled solidification to avoid shrinkage porosity.
What is the maximum service temperature of CE30?
CE30 is rated for continuous use to about 650°C (1,202 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between CE30-F and CE30-ST?
F is the default condition — standard supply condition for CE30 — the ferrite network keeps intergranular corrosion resistance acceptable without solution annealing, and strength is highest. ST: pick when maximum ductility/toughness and freedom from carbide or sigma networks is required (e.g. A744 corrosion-service castings or parts to be welded). Yield strength is 434 MPa in F versus 360 MPa in ST.
How much does CE30 cost?
CE30 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
- ASTM A743/A743M — Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application — ASTM International (2019)
- ASTM A744/A744M — Castings, Iron-Chromium-Nickel, Corrosion Resistant, for Severe Service — ASTM International (2021)
- ASM Specialty Handbook: Stainless Steels (cast corrosion-resistant alloys, ACI designations) — ASM International (1994)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- Steel Founders' Society of America — Steel Castings Handbook, Supplement 8 (High Alloy Data Sheets) — SFSA (2004)
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.