Stainless Steel CF8
ASTM CF8 · UNS J92600 · EN 1.4308, GX5CrNi19-9 · JIS SCS13, SCS13A · GB ZG07Cr19Ni10, 10Kh18N9L
CF8 is the cast austenitic stainless equivalent of wrought 304 (ASTM A351/A744 CF8, J92600, 1.4308, GX5CrNi19-9, SCS13), a 19Cr-9Ni composition that solidifies with 5–20 % δ-ferrite.
Reference datasheet — CF8 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
CF8 tempers and conditions
CF8 is supplied in 4 conditions, soft to hard. SA is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
SADefault Solution annealed | Standard supply condition for all pressure-retaining CF8 castings; carbides dissolved for best corrosion resistance and ductility. | 255 | 520 | 55 | 140 HB | — |
solution annealed casting for severe corrosive service | Order to ASTM A744 when corrosion performance (not just pressure integrity) governs; tighter heat-treat/quench and surface-condition requirements. | 255 | 520 | 55 | 140 HB | 2.3 % IACS |
As fabricated | Only for non-pressure, non-corrosive decorative or structural parts — carbide networks from slow cooling leave the casting sensitized and less ductile. | 265 | 500 | 30 | 160 HB | 2.3 % IACS |
Solution annealed, higher-ferrite higher-strength variant | Pick when the drawing calls out higher minimum strength (530/240 MPa) at slightly reduced toughness; same chemistry envelope with balanced higher δ-ferrite. | 285 | 570 | 48 | 155 HB | 2.3 % IACS |
Supply forms, finishes and certifications
Ways CF8 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
CPF8 | Centrifugally cast pipe, solution annealed | Supply option |
What is CF8?
CF8 is the cast austenitic stainless equivalent of wrought 304 (ASTM A351/A744 CF8, J92600, 1.4308, GX5CrNi19-9, SCS13), a 19Cr-9Ni composition that solidifies with 5–20 % δ-ferrite. It is the default choice for pressure-containing and corrosion-service castings — valve bodies, pump casings and fittings — offering 255 MPa yield, 520 MPa tensile, 55 % elongation and 140 HB (77 HRB) after solution annealing, with service to 760 °C. Chloride pitting resistance is limited (65), so specify CF8M where chlorides are present and CF3 where as-welded joints must resist intergranular attack. CF8 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). CF8 has a yield strength of 255 MPa (37 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 87% of stainless steel grades. Elongation at break is 55% and the elastic modulus is 195 GPa (28.3 Msi).
What is CF8 used for?
- valve bodies
- pump casings
- pipe fittings
- food processing equipment
Advantages
- Ductile — tolerates forming and impact — 55%, better than 97% of stainless steel grades
- Tough — resists crack growth — 200 MPa·√m (182 ksi·√in), better than 86% of stainless steel grades
- Low embodied carbon — 3.6 kg CO₂/kg, better than 83% of stainless steel grades
Limitations
- Low strength — 255 MPa (37 ksi), worse than 87% of stainless steel grades
- Hard to polish — 60/100, worse than 80% of stainless steel grades
CF8 properties
Typical room-temperature values for CF8-SA; bars are the position among stainless steel grades.
Physical3
CF8 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).
Mechanical16
CF8 has a yield strength of 255 MPa (37 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 87% of stainless steel grades. Elongation at break is 55% and the elastic modulus is 195 GPa (28.3 Msi).
Thermal6
CF8 is rated for continuous service to 760°C (1,400 °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 17.3 µm/m·K (9.61 µin/in·°F).
Electrical3
CF8 conducts electricity at 2.3 % IACS, better than 55% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (65/100), better than 56% of stainless steel grades.
Sustainability4
Producing a kilogram of CF8 takes about 48 MJ of energy and emits 3.6 kg of CO₂ — less than 85% of stainless steel grades. Typical recycled content is 85%.
Manufacturability7
CF8's machinability is fair (40/100, better than 72% of stainless steel grades); weldability very good (78/100).
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. CF8 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with CF8
Is CF8 easy to machine?
Machine like 304: rigid setup, positive-rake carbide, heavy constant feed to cut under the work-hardened skin, and flood coolant; expect ~40% of 1212 speeds and remove the abrasive cast skin in the first pass.
Can CF8 be welded?
Readily welded by GTAW/GMAW/SMAW with 308/308L filler, no preheat and low interpass temperature; the 5–20% δ-ferrite suppresses hot cracking, but weld repairs on corrosion-service parts should be followed by re-solution annealing.
Can CF8 be formed, bent or molded?
Foundry alloy — good fluidity and moderate 2.0–2.5% solidification shrinkage; use generous risering, chills at heavy sections, then solution anneal at 1040–1100 °C and water quench.
CF8 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 |
|---|---|---|
| CASTM A351/A743 CF8 | ≤ 0.08 | 0.06 |
| Mn | ≤ 1.5 | 1 |
| Siaids fluidity | ≤ 2 | 1.3 |
| P | ≤ 0.04 | 0.03 |
| S | ≤ 0.04 | 0.02 |
| Cr | 18 – 21 | 19.5 |
| Ni | 8 – 11 | 9.5 |
| Moresidual, per A351 optional limit | ≤ 0.5 | 0.2 |
| Fe | balance |
What surface finishes work on CF8?
Passivate per ASTM A967 (nitric or citric) or electropolish after machining; shot/bead blast and pickling remove scale, and mechanical polish reaches ~Ra 0.4 µm limited by casting 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 CF8 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- J92600
- ASTM
- A351 CF8
- EN / DIN / Werkstoff-Nr.
- 1.4308GX5CrNi19-9GX5CrNi19-10
- GB (China)
- ZG07Cr19Ni1010Kh18N9L
- JIS
- SCS13SCS13A
- Also called
- Cast 304ZG1Cr18Ni9
How much does CF8 cost?
CF8 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.
CF8 — frequently asked
What is CF8 used for?
CF8 is typically used for valve bodies, pump casings, pipe fittings and food processing equipment. In short: cast equivalent of 304; default stainless casting grade; weldable with 308L filler.
What is the yield strength of CF8?
CF8 has a typical yield strength of 255 MPa (37 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 87% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is CF8 easy to machine?
Not especially — machinability is rated fair (40/100, better than 72% of stainless steel grades). Machine like 304: rigid setup, positive-rake carbide, heavy constant feed to cut under the work-hardened skin, and flood coolant; expect ~40% of 1212 speeds and remove the abrasive cast skin in the first pass.
Can CF8 be welded?
Yes — weldability is rated very good (78/100). Readily welded by GTAW/GMAW/SMAW with 308/308L filler, no preheat and low interpass temperature; the 5–20% δ-ferrite suppresses hot cracking, but weld repairs on corrosion-service parts should be followed by re-solution annealing.
What surface finishes work on CF8?
Passivate per ASTM A967 (nitric or citric) or electropolish after machining; shot/bead blast and pickling remove scale, and mechanical polish reaches ~Ra 0.4 µm limited by casting porosity.
Can CF8 be formed, bent or molded?
Foundry alloy — good fluidity and moderate 2.0–2.5% solidification shrinkage; use generous risering, chills at heavy sections, then solution anneal at 1040–1100 °C and water quench.
What is the maximum service temperature of CF8?
CF8 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 CF8-SA and CF8A?
SA is the default condition — standard supply condition for all pressure-retaining CF8 castings; carbides dissolved for best corrosion resistance and ductility. CF8A: pick when the drawing calls out higher minimum strength (530/240 MPa) at slightly reduced toughness; same chemistry envelope with balanced higher δ-ferrite. Yield strength is 255 MPa in SA versus 285 MPa in CF8A.
How much does CF8 cost?
CF8 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 (2022)
- ASTM A743/A743M Castings, Iron-Chromium-Nickel, Corrosion Resistant, for General Application — ASTM (2021)
- ASTM A744/A744M Castings, Iron-Chromium-Nickel, Corrosion Resistant, for Severe Service — ASTM (2021)
- ASTM A451/A451M Centrifugally Cast Austenitic Steel Pipe for High-Temperature Service — ASTM (2021)
- EN 10213 / EN 10283 — GX5CrNi19-10 (1.4308) — CEN (2016)
- GB/T 12230 (ZG07Cr19Ni10) — SAC (2016)
- ASM Handbook Vol.1 — Cast Stainless Steels — ASM International (1990)
- Steel Castings Handbook, 6th ed. — Steel Founders' Society of America (1995)
- Nickel Institute — Cast Stainless Steels reference series — Nickel Institute (2020)
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.