Stainless Steel 1.4308
EN 1.4308 · UNS J92600 · ASTM CF8
1.4308 (GX5CrNi19-10) is the European cast equivalent of 304 stainless, also designated CF8 / J92600 in ASTM A351/A743 — the general-purpose 19Cr-10Ni austenitic casting grade of the process industries.
Reference datasheet — 1.4308 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 ST condition
1.4308 tempers and conditions
1.4308 is supplied in 4 conditions, soft to hard. ST 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 |
|---|---|---|---|---|---|---|
pressure-containing certified casting (min. spec values) | Order this when ASME B16.34 / A351 certification with guaranteed minima and hydro/RT testing is required. | 205 | 485 | 35 | 160 HB | 2.4 % IACS |
STDefault Solution annealed | Standard delivery condition for all pressure and corrosion-service castings; carbides dissolved for maximum corrosion resistance and ductility. | 250 | 520 | 50 | 140 HB | 2.4 % IACS |
Spheroidize annealed | Only for non-critical, non-corrosive structural or decorative castings — carbide networks reduce corrosion resistance and toughness. | 260 | 500 | 32 | 160 HB | 2.4 % IACS |
Centrifugally cast tube, solution annealed | Centrifugally cast pipe/sleeves (ASTM A451/A452 class) — dense, defect-free wall with the highest as-cast strength for this grade. | 275 | 550 | 45 | 150 HB | 2.4 % IACS |
Supply forms, finishes and certifications
Ways 1.4308 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
ST-IC | Investment cast, solution annealed | Surface finish |
ST-SC | Sand cast heavy section, solution annealed | Surface finish |
What is 1.4308?
1.4308 (GX5CrNi19-10) is the European cast equivalent of 304 stainless, also designated CF8 / J92600 in ASTM A351/A743 — the general-purpose 19Cr-10Ni austenitic casting grade of the process industries. It is chosen for ductility and all-round corrosion resistance at low cost: 250 MPa yield, 520 MPa tensile, 50 % elongation, 140 HB, service to 760 °C and a corrosion-resistance score of 68, available as sand, investment and centrifugal castings. The 0.08 % max carbon leaves it sensitive to intergranular attack after welding unless re-annealed, so use 1.4309 (CF3) for as-welded service and 1.4408 (CF8M) where chlorides are present. 1.4308 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). 1.4308 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 91% of stainless steel grades. Elongation at break is 50% and the elastic modulus is 195 GPa (28.3 Msi).
What is 1.4308 used for?
- pump bodies
- valve castings
- food and chemical processing fittings
Advantages
- Readily welded — 88/100, better than 91% of stainless steel grades
- Ductile — tolerates forming and impact — 50%, better than 90% of stainless steel grades
Limitations
- Low strength — 250 MPa (36.3 ksi), worse than 91% of stainless steel grades
1.4308 properties
Typical room-temperature values for 1.4308-ST; bars are the position among stainless steel grades.
Physical3
1.4308 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
1.4308 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 91% of stainless steel grades. Elongation at break is 50% and the elastic modulus is 195 GPa (28.3 Msi).
Thermal6
1.4308 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 µm/m·K (9.44 µin/in·°F).
Electrical3
1.4308 conducts electricity at 2.4 % IACS, better than 67% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (68/100), better than 63% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4308 takes about 60 MJ of energy and emits 5 kg of CO₂ — more than 70% of stainless steel grades. Typical recycled content is 70%.
Manufacturability8
1.4308's machinability is fair (40/100, better than 72% of stainless steel grades); weldability excellent (88/100); formability poor (30/100).
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. 1.4308 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4308
Is 1.4308 easy to machine?
Gummy and work-hardening: use sharp positive-rake carbide, rigid setup, 60–120 m/min, heavy positive feed to cut beneath the hardened layer, plenty of coolant.
Can 1.4308 be welded?
Readily welded by GTAW/SMAW with 308/308L filler; keep interpass low, no preheat, and solution anneal after major repair welds to restore corrosion resistance.
Can 1.4308 be formed, bent or molded?
Sand, investment and centrifugal casting all work well; allow ~2% solidification shrinkage, use generous risers on heavy sections and control δ-ferrite to 5–15 FN for hot-crack resistance.
1.4308 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 |
|---|---|---|
| CEN 1.4308 limits C ≤ 0.07 | ≤ 0.08 | 0.06 |
| SiEN: Si ≤ 1.5 | ≤ 2 | 1.2 |
| Mn | ≤ 1.5 | 1 |
| P | ≤ 0.04 | 0.03 |
| SEN: S ≤ 0.030 | ≤ 0.04 | 0.02 |
| CrEN 1.4308: 18.0–20.0 | 18 – 21 | 19.5 |
| Ni | 8 – 11 | 9.5 |
| Moresidual only | ≤ 0.5 | 0.2 |
| Fe | balance |
What surface finishes work on 1.4308?
Pickle/passivate (ASTM A967) or electropolish after machining; shot blasting improves appearance but leaves surface iron that must be removed to avoid rust bloom.
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 1.4308 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- J92600
- ASTM
- CF8
- EN / DIN / Werkstoff-Nr.
- GX5CrNi19-10
How much does 1.4308 cost?
1.4308 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.
1.4308 — frequently asked
What is 1.4308 used for?
1.4308 is typically used for pump bodies, valve castings and food and chemical processing fittings. In short: cast 304 workhorse; lowest-cost cast austenitic; very high as-cast ductility.
What is the yield strength of 1.4308?
1.4308 has a typical yield strength of 250 MPa (36.3 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 91% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is 1.4308 easy to machine?
Not especially — machinability is rated fair (40/100, better than 72% of stainless steel grades). Gummy and work-hardening: use sharp positive-rake carbide, rigid setup, 60–120 m/min, heavy positive feed to cut beneath the hardened layer, plenty of coolant.
Can 1.4308 be welded?
Yes — weldability is rated excellent (88/100). Readily welded by GTAW/SMAW with 308/308L filler; keep interpass low, no preheat, and solution anneal after major repair welds to restore corrosion resistance.
What surface finishes work on 1.4308?
Pickle/passivate (ASTM A967) or electropolish after machining; shot blasting improves appearance but leaves surface iron that must be removed to avoid rust bloom.
Can 1.4308 be formed, bent or molded?
Sand, investment and centrifugal casting all work well; allow ~2% solidification shrinkage, use generous risers on heavy sections and control δ-ferrite to 5–15 FN for hot-crack resistance.
What is the maximum service temperature of 1.4308?
1.4308 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 1.4308-ST and 1.4308 ST-CENT?
ST is the default condition — standard delivery condition for all pressure and corrosion-service castings; carbides dissolved for maximum corrosion resistance and ductility. ST-CENT: centrifugally cast pipe/sleeves (ASTM A451/A452 class) — dense, defect-free wall with the highest as-cast strength for this grade. Yield strength is 250 MPa in ST versus 275 MPa in ST-CENT.
How much does 1.4308 cost?
1.4308 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
- EN 10213 — Steel castings for pressure purposes — CEN (2016)
- EN 10283 — Corrosion resistant steel castings — CEN (2010)
- ASTM A351/A351M — Castings, Austenitic, for Pressure-Containing Parts — ASTM (2020)
- ASTM A743/A743M — Castings, Iron-Chromium-Nickel, Corrosion Resistant — ASTM (2021)
- ASM Specialty Handbook: Stainless Steels — ASM International (1994)
- ASM Handbook Vol. 15 — Casting — ASM International (2008)
- Steel Castings Handbook — Steel Founders' Society of America (1995)
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.