Stainless Steel CF10SMnN-SA (Solution annealed)
Heat-treated state · default condition
ASTM CF10SMnN · UNS J92972
Standard supply condition: ~1040–1100 °C solution treat and rapid quench, giving fully austenitic, non-magnetic castings that meet A351 mechanical minima.
Values for the SA condition
Other CF10SMnN tempers and conditions
CF10SMnN is listed in 3 conditions; see the grade overview at CF10SMnN.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
SADefaultThis page Solution annealed | Standard supply condition: ~1040–1100 °C solution treat and rapid quench, giving fully austenitic, non-magnetic castings that meet A351 mechanical minima. | 330 | 640 | 42 | 190 HB | — |
As fabricated | Only for non-critical or wear-only parts where certification to A351 mechanicals is not required; interdendritic segregation and possible sigma/silicide phase reduce ductility and corrosion resistance. | 350 | 600 | 25 | 16 HRC | 2.3 % IACS |
Centrifugally cast, solution annealed | Choose for bushings, sleeves and valve-seat rings where the finer, directionally solidified centrifugal structure gives higher strength and fewer shrinkage defects than static castings. | 360 | 680 | 40 | 200 HB | 2.3 % IACS |
What is CF10SMnN-SA?
CF10SMnN-SA is CF10SMnN heat treated to SA — standard supply condition: ~1040–1100 °C solution treat and rapid quench, giving fully austenitic, non-magnetic castings that meet A351 mechanical minima. CF10SMnN-SA has a yield strength of 330 MPa (47.9 ksi) and a tensile strength of 640 MPa (92.8 ksi) — weaker than 57% of stainless steel grades. Elongation at break is 42% and the elastic modulus is 196 GPa (28.4 Msi). CF10SMnN-SA has a density of 7.6 g/cm³ (0.275 lb/in³), lighter than 98% of stainless steel grades. It melts at 1,370°C (2,498 °F).
Advantages
- High service temperature — 870°C (1,598 °F), better than 83% of stainless steel grades
Limitations
- Difficult to machine — 25/100, worse than 88% of stainless steel grades
- Poor heat conductor — 13 W/m·K (7.51 BTU/hr·ft·°F), worse than 85% of stainless steel grades
- Hard to polish — 60/100, worse than 80% of stainless steel grades
CF10SMnN-SA properties
Typical room-temperature values for CF10SMnN-SA; 11 are specific to this condition. Other listed values are CF10SMnN reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
CF10SMnN-SA has a density of 7.6 g/cm³ (0.275 lb/in³), lighter than 98% of stainless steel grades. It melts at 1,370°C (2,498 °F).
Mechanical15
CF10SMnN-SA has a yield strength of 330 MPa (47.9 ksi) and a tensile strength of 640 MPa (92.8 ksi) — weaker than 57% of stainless steel grades. Elongation at break is 42% and the elastic modulus is 196 GPa (28.4 Msi).
Thermal6
CF10SMnN-SA is rated for continuous service to 870°C (1,598 °F). It conducts heat at 13 W/m·K (7.51 BTU/hr·ft·°F), worse than 85% of stainless steel grades. Thermal expansion is 14.7 µm/m·K (8.17 µin/in·°F).
Electrical3
CF10SMnN-SA conducts electricity at 2.3 % IACS, better than 55% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (66/100), better than 59% of stainless steel grades.
Sustainability4
Producing a kilogram of CF10SMnN-SA takes about 53 MJ of energy and emits 4.2 kg of CO₂ — less than 67% of stainless steel grades. Typical recycled content is 70%.
Manufacturability8
CF10SMnN-SA's machinability is poor (25/100, worse than 88% of stainless steel grades); weldability very good (70/100); formability fair (40/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with CF10SMnN-SA
Is CF10SMnN easy to machine?
Difficult: use rigid setups, sharp positive-rake carbide, heavy depth of cut with low-to-moderate speed (~40–70 m/min) and generous flood coolant — never dwell, as the surface work-hardens instantly.
Can CF10SMnN be welded?
Readily GTAW/SMAW welded with matching S21800 (Nitronic 60W) or 209/240-type filler; no preheat, keep interpass low, and re-solution-anneal only if the part must recover full ductility.
Can CF10SMnN be formed, bent or molded?
Supplied as castings — control pour temperature and use generous radii/risers because high-Si nitrogen-bearing melts are hot-tear and pinhole-porosity prone; hot working (if wrought equivalent) at 1150–1200 °C.
What surface finishes work on CF10SMnN?
Passivate per ASTM A967 or electropolish after machining; no anodizing — the alloy is normally used bare because its Si-rich surface already resists galling and cavitation, and hard coatings are usually unnecessary.
CF10SMnN 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 |
|---|---|---|
| C0.10 % max per ASTM A351/A743 | ≤ 0.1 | 0.07 |
| Mnaustenite stabiliser, replaces Ni | 7 – 9 | 8 |
| Sikey to galling / cavitation / oxidation resistance | 3.5 – 4.5 | 4 |
| P | ≤ 0.06 | 0.03 |
| S | ≤ 0.03 | 0.02 |
| Cr | 16 – 18 | 17 |
| Ni | 8 – 9 | 8.5 |
| Nsolid-solution strengthener | 0.08 – 0.18 | 0.13 |
| Fe | balance | — |
CF10SMnN-SA — frequently asked
What is CF10SMnN-SA used for?
CF10SMnN-SA is typically used for cost-sensitive corrosion-resistant castings, general valve bodies, cast pipe fittings, pump casings and wear rings, galling-prone sliding and seat components and cavitation-exposed water handling castings. In short: low-nickel cast austenitic; nitrogen-strengthened, galling resistant; hardest CF grade to machine.
What is the yield strength of CF10SMnN-SA?
CF10SMnN-SA has a typical yield strength of 330 MPa (47.9 ksi) and a tensile strength of 640 MPa (92.8 ksi) — weaker than 57% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is CF10SMnN-SA easy to machine?
Not especially — machinability is rated poor (25/100, worse than 88% of stainless steel grades). Difficult: use rigid setups, sharp positive-rake carbide, heavy depth of cut with low-to-moderate speed (~40–70 m/min) and generous flood coolant — never dwell, as the surface work-hardens instantly.
Can CF10SMnN-SA be welded?
Yes — weldability is rated very good (70/100). Readily GTAW/SMAW welded with matching S21800 (Nitronic 60W) or 209/240-type filler; no preheat, keep interpass low, and re-solution-anneal only if the part must recover full ductility.
What surface finishes work on CF10SMnN-SA?
Passivate per ASTM A967 or electropolish after machining; no anodizing — the alloy is normally used bare because its Si-rich surface already resists galling and cavitation, and hard coatings are usually unnecessary.
Can CF10SMnN-SA be formed, bent or molded?
Supplied as castings — control pour temperature and use generous radii/risers because high-Si nitrogen-bearing melts are hot-tear and pinhole-porosity prone; hot working (if wrought equivalent) at 1150–1200 °C.
What is the maximum service temperature of CF10SMnN-SA?
CF10SMnN-SA is rated for continuous use to about 870°C (1,598 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between CF10SMnN-SA and CF10SMnN SA-CENT?
SA is the default condition — standard supply condition: ~1040–1100 °C solution treat and rapid quench, giving fully austenitic, non-magnetic castings that meet A351 mechanical minima. SA-CENT: choose for bushings, sleeves and valve-seat rings where the finer, directionally solidified centrifugal structure gives higher strength and fewer shrinkage defects than static castings. Yield strength is 330 MPa in SA versus 360 MPa in SA-CENT.
Sources
- ASTM A351/A351M — Castings, Austenitic, for Pressure-Containing Parts — ASTM International (2018)
- ASTM A743/A743M — Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application — ASTM International (2019)
- ASTM A967/A967M — Chemical Passivation Treatments for Stainless Steel Parts — ASTM International (2017)
- 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 — ASM International (2005)
- Nitronic 60 (UNS S21800) alloy datasheet — AK Steel / Cleveland-Cliffs (2020)
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.