Stainless Steel CF10MC
ASTM CF10MC · UNS J92971
CF10MC is a columbium (Nb)-stabilized 19Cr-9Ni-Mo cast austenitic stainless steel (UNS J92971), essentially CF8C with a molybdenum addition, supplied under the ASTM cast stainless family.
Reference datasheet — CF10MC 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 SA condition
CF10MC tempers and conditions
CF10MC is supplied in 3 conditions, soft to hard. SA 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 |
|---|---|---|---|---|---|---|
SADefault Solution annealed ≥1040 °C, water quenched | Standard supply condition for all pressure-containing castings: maximum ductility, dissolved chromium carbides, Nb held for later stabilization. | 250 | 530 | 38 | 150 HB | — |
SA + stabilization anneal | Optional extra stabilizing soak that ties carbon up as NbC before service; chosen for long-term 450–800 °C or severe intergranular-corrosion duty. | 255 | 520 | 34 | 155 HB | 2.2 % IACS |
Spheroidize annealed | Only for non-code, non-corrosive structural castings — grain-boundary carbides lower ductility and intergranular corrosion resistance. | 260 | 500 | 22 | 165 HB | 2.2 % IACS |
What is CF10MC?
CF10MC is a columbium (Nb)-stabilized 19Cr-9Ni-Mo cast austenitic stainless steel (UNS J92971), essentially CF8C with a molybdenum addition, supplied under the ASTM cast stainless family. Engineers specify it for sand and investment cast valve bodies and pump casings where welding or elevated-temperature exposure must not cause carbide precipitation in Mo-bearing service; default values are 250 MPa yield, 530 MPa tensile, 38 % elongation, 150 HB (80 HRB) and service to 760 °C. Machinability is low (score 35) because the matrix work-hardens and carries hard NbC particles, and casting skin limits achievable surface finish. Choose CF8C where molybdenum is not needed, or CF8M where stabilization is not required. CF10MC has a density of 7.95 g/cm³ (0.287 lb/in³), heavier than 81% of stainless steel grades. It melts at 1,385°C (2,525 °F). CF10MC has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 530 MPa (76.9 ksi) — weaker than 91% of stainless steel grades. Elongation at break is 38% and the elastic modulus is 193 GPa (28 Msi).
What is CF10MC used for?
- valve bodies
- pump castings for high-temperature service
- stabilized weldable pressure castings
Advantages
- Readily welded — 82/100, better than 84% of stainless steel grades
Limitations
- Low strength — 250 MPa (36.3 ksi), worse than 91% of stainless steel grades
- Hard to polish — 55/100, worse than 89% of stainless steel grades
CF10MC properties
Typical room-temperature values for CF10MC-SA; bars are the position among stainless steel grades.
Physical3
CF10MC has a density of 7.95 g/cm³ (0.287 lb/in³), heavier than 81% of stainless steel grades. It melts at 1,385°C (2,525 °F).
Mechanical16
CF10MC has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 530 MPa (76.9 ksi) — weaker than 91% of stainless steel grades. Elongation at break is 38% and the elastic modulus is 193 GPa (28 Msi).
Thermal6
CF10MC is rated for continuous service to 760°C (1,400 °F). It conducts heat at 14.5 W/m·K (8.38 BTU/hr·ft·°F), worse than 72% of stainless steel grades. Thermal expansion is 16 µm/m·K (8.89 µin/in·°F).
Electrical3
CF10MC conducts electricity at 2.2 % IACS, worse than 61% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (68/100), better than 63% of stainless steel grades.
Sustainability4
Producing a kilogram of CF10MC takes about 55 MJ of energy and emits 4.6 kg of CO₂ — more than 50% of stainless steel grades. Typical recycled content is 65%.
Manufacturability8
CF10MC's machinability is fair (35/100, better than 51% of stainless steel grades); weldability very good (82/100); formability fair (45/100).
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. CF10MC is highlighted; hover a dot for its name, or open the interactive family chart.
Working with CF10MC
Is CF10MC easy to machine?
Work-hardening austenitic casting plus hard NbC particles — use rigid setups, sharp coated carbide, heavy positive feed, 60–110 m/min, flood coolant, avoid dwelling.
Can CF10MC be welded?
Very good with GTAW/SMAW using ER/E 316Cb (or 316L/347 matching) filler; Nb stabilization means no post-weld solution anneal is normally needed, but keep heat input low and interpass <150 °C to limit hot-cracking in the low-ferrite matrix.
Can CF10MC be formed, bent or molded?
Supplied as sand or investment castings; provide generous risering (long freezing range, ~2 % solidification shrinkage) and avoid abrupt section changes; cold forming is not a normal route.
CF10MC 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 |
|---|---|---|
| CNb ≥ 10×C required for stabilization | ≤ 0.1 | 0.07 |
| Mn | ≤ 1.5 | 1 |
| Si | ≤ 2 | 1.2 |
| P | ≤ 0.04 | |
| S | ≤ 0.04 | |
| Cr | 15 – 18 | 16.5 |
| Ni | 13 – 16 | 14.5 |
| Mo | 1.75 – 2.25 | 2 |
| NbCb (columbium) ≥ 10 × C min per ASTM A351 | 0.7 – 1.2 | 0.9 |
| Fe | balance |
What surface finishes work on CF10MC?
Grind/blast, then pickle-passivate per ASTM A967 or electropolish; no anodizing — surface finish is limited by casting skin and porosity.
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 CF10MC in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- J92971
How much does CF10MC cost?
CF10MC 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.
CF10MC — frequently asked
What is CF10MC used for?
CF10MC is typically used for valve bodies, pump castings for high-temperature service and stabilized weldable pressure castings. In short: nb-stabilized Mo cast austenitic; as-welded, no solution anneal; 760 °C service capability.
What is the yield strength of CF10MC?
CF10MC has a typical yield strength of 250 MPa (36.3 ksi) and a tensile strength of 530 MPa (76.9 ksi) — weaker than 91% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is CF10MC easy to machine?
Not especially — machinability is rated fair (35/100, better than 51% of stainless steel grades). Work-hardening austenitic casting plus hard NbC particles — use rigid setups, sharp coated carbide, heavy positive feed, 60–110 m/min, flood coolant, avoid dwelling.
Can CF10MC be welded?
Yes — weldability is rated very good (82/100). Very good with GTAW/SMAW using ER/E 316Cb (or 316L/347 matching) filler; Nb stabilization means no post-weld solution anneal is normally needed, but keep heat input low and interpass <150 °C to limit hot-cracking in the low-ferrite matrix.
What surface finishes work on CF10MC?
Grind/blast, then pickle-passivate per ASTM A967 or electropolish; no anodizing — surface finish is limited by casting skin and porosity.
Can CF10MC be formed, bent or molded?
Supplied as sand or investment castings; provide generous risering (long freezing range, ~2 % solidification shrinkage) and avoid abrupt section changes; cold forming is not a normal route.
What is the maximum service temperature of CF10MC?
CF10MC is rated for continuous use to about 760°C (1,400 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between CF10MC-SA and CF10MC-AC?
SA is the default condition — standard supply condition for all pressure-containing castings: maximum ductility, dissolved chromium carbides, Nb held for later stabilization. AC: only for non-code, non-corrosive structural castings — grain-boundary carbides lower ductility and intergranular corrosion resistance. Yield strength is 250 MPa in SA versus 260 MPa in AC.
How much does CF10MC cost?
CF10MC 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 A351/A351M — Castings, Austenitic, for Pressure-Containing Parts — ASTM International (2018)
- ASTM A743/A743M — Castings, Iron-Chromium-Nickel, Corrosion Resistant, for General Application — ASTM International (2021)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys (Cast Stainless Steels) — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials (Cast Stainless Steels) — ASM International (2005)
- Steel Founders' Society of America — High Alloy Data Sheets, Corrosion Series (CF grades) — 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.