Stainless Steel CF10M-AC (Spheroidize annealed)
Heat-treated state
ASTM CF10M · UNS J92901
Only for non-pressure, non-corrosive structural castings — interdendritic carbides reduce ductility and intergranular corrosion resistance.
Values for the AC condition
Other CF10M tempers and conditions
CF10M is listed in 2 conditions; see the grade overview at CF10M.
- SA
- AC
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
SADefault Solution annealed (≥1040 °C, water quenched) per ASTM A351/A743 | Standard supply condition for pressure-containing castings: carbides dissolved, maximum corrosion resistance and ductility. | 250 | 520 | 45 | 160 HB | — |
ACThis page Spheroidize annealed | Only for non-pressure, non-corrosive structural castings — interdendritic carbides reduce ductility and intergranular corrosion resistance. | 260 | 500 | 28 | 175 HB | 2.3 % IACS |
What is CF10M-AC?
CF10M-AC is CF10M heat treated to AC — only for non-pressure, non-corrosive structural castings — interdendritic carbides reduce ductility and intergranular corrosion resistance. CF10M-AC has a yield strength of 260 MPa (37.7 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 84% of stainless steel grades. Elongation at break is 28% and the elastic modulus is 193 GPa (28 Msi). CF10M-AC has a density of 7.75 g/cm³ (0.28 lb/in³), lighter than 65% of stainless steel grades. It melts at 1,400°C (2,552 °F). SA is the default condition FabDigit quotes; AC is available on request or by drawing note.
Limitations
- Limited formability — 10/100, worse than 95% of stainless steel grades
- Hard to polish — 55/100, worse than 89% of stainless steel grades
- Low strength — 260 MPa (37.7 ksi), worse than 84% of stainless steel grades
- Difficult to weld — 50/100, worse than 77% of stainless steel grades
CF10M-AC properties
Typical room-temperature values for CF10M-AC; 23 are specific to this condition. Other listed values are CF10M reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
CF10M-AC has a density of 7.75 g/cm³ (0.28 lb/in³), lighter than 65% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Mechanical14
CF10M-AC has a yield strength of 260 MPa (37.7 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 84% of stainless steel grades. Elongation at break is 28% and the elastic modulus is 193 GPa (28 Msi).
Thermal6
CF10M-AC is rated for continuous service to 550°C (1,022 °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
CF10M-AC conducts electricity at 2.3 % IACS, better than 55% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 71% of stainless steel grades.
Sustainability4
Producing a kilogram of CF10M-AC takes about 52 MJ of energy and emits 4.6 kg of CO₂ — less than 76% of stainless steel grades. Typical recycled content is 75%.
Manufacturability8
CF10M-AC's machinability is fair (35/100, better than 51% of stainless steel grades); weldability fair (50/100); formability not recommended (10/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with CF10M-AC
Is CF10M easy to machine?
Work-hardening and gummy: use rigid setups, sharp coated carbide, positive rake, heavy positive feed, 60–110 m/min, flood coolant; avoid dwelling to prevent glazing.
Can CF10M be welded?
Readily welded with ER316L/E316L-15 or matching CF10M filler; no preheat, interpass <150 °C, back-purge; re-solution anneal after major weld repair to restore intergranular corrosion resistance at this carbon level.
Can CF10M be formed, bent or molded?
Sand or investment casting with generous risers and chills (long freezing range, ~2.2% solidification shrinkage); keep ferrite 5–20 FN (Schoefer) for hot-tear resistance and weldability.
What surface finishes work on CF10M?
Pickle and passivate per ASTM A967/A380 after machining and welding; electropolish for hygienic service; no anodizing — plating rarely needed.
CF10M 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 |
|---|---|---|
| Cstandard-carbon version of CF8M | 0.04 – 0.1 | 0.07 |
| Mn | ≤ 1.5 | 1 |
| Si | ≤ 1.5 | 1.2 |
| P | ≤ 0.04 | 0.03 |
| S | ≤ 0.04 | 0.02 |
| Cr | 18 – 21 | 19.5 |
| Ni | 9 – 12 | 10 |
| Mopitting resistance in chlorides | 2 – 3 | 2.4 |
| Fe | balance | — |
CF10M-AC — frequently asked
What is CF10M-AC used for?
CF10M-AC is typically used for valve bodies, pump casings, chemical process castings and marine hardware. In short: mo-bearing chloride-resistant casting; higher-carbon CF8M variant; best pitting resistance in family.
What is the yield strength of CF10M-AC?
CF10M-AC has a typical yield strength of 260 MPa (37.7 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 84% of stainless steel grades. Strength varies by condition: see the 2 listed tempers.
Is CF10M-AC easy to machine?
Not especially — machinability is rated fair (35/100, better than 51% of stainless steel grades). Work-hardening and gummy: use rigid setups, sharp coated carbide, positive rake, heavy positive feed, 60–110 m/min, flood coolant; avoid dwelling to prevent glazing.
Can CF10M-AC be welded?
With care — weldability is rated fair (50/100). Readily welded with ER316L/E316L-15 or matching CF10M filler; no preheat, interpass <150 °C, back-purge; re-solution anneal after major weld repair to restore intergranular corrosion resistance at this carbon level.
What surface finishes work on CF10M-AC?
Pickle and passivate per ASTM A967/A380 after machining and welding; electropolish for hygienic service; no anodizing — plating rarely needed.
Can CF10M-AC be formed, bent or molded?
Sand or investment casting with generous risers and chills (long freezing range, ~2.2% solidification shrinkage); keep ferrite 5–20 FN (Schoefer) for hot-tear resistance and weldability.
What is the maximum service temperature of CF10M-AC?
CF10M-AC is rated for continuous use to about 550°C (1,022 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between CF10M-SA and CF10M-AC?
SA is the default condition — standard supply condition for pressure-containing castings: carbides dissolved, maximum corrosion resistance and ductility. AC: only for non-pressure, non-corrosive structural castings — interdendritic carbides reduce ductility and intergranular corrosion resistance. Yield strength is 250 MPa in SA versus 260 MPa in AC.
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)
- ASTM A451/A451M — Centrifugally Cast Austenitic Steel Pipe for High-Temperature Service — ASTM International (2021)
- ASM Specialty Handbook: Stainless Steels — ASM International (1994)
- Steel Castings Handbook, 6th ed. — Steel Founders' Society of America / ASM (1995)
- ASM Handbook Vol.1: Properties and Selection — Irons, Steels and High-Performance Alloys — ASM International (1990)
- High-Alloy Data Sheets, Corrosion Resistant Type CF10M — SFSA (2004)
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.