Stainless Steel 1.3955 CENTRIFUGAL
Finish state
EN 1.3955
Pipe and cylinder forms with denser, finer structure and higher strength than static castings.
Values for the CENTRIFUGAL condition
Other 1.3955 tempers and conditions
1.3955 is listed in 5 conditions; see the grade overview at 1.3955.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Spheroidize annealed | Cheapest condition for non-corrosive structural or ornamental castings only; retained carbides make it sensitization-prone. | 250 | 500 | 30 | 155 HB | 2.3 % IACS |
STDefault Solution annealed | Standard supply condition for all corrosion-service castings; dissolves carbides and restores maximum corrosion resistance and ductility. | 255 | 520 | 50 | 140 HB | — |
Solution annealed after hot isostatic pressing | Choose for pressure-tight, radiographically clean castings (valve/pump bodies, nuclear and subsea parts) where micro-shrinkage must be closed. | 265 | 545 | 55 | 145 HB | 2.3 % IACS |
CENTRIFUGALThis page Centrifugally cast + solution annealed (ASTM A451 CPF8 type) | Pipe and cylinder forms with denser, finer structure and higher strength than static castings. | 275 | 545 | 45 | 150 HB | 2.3 % IACS |
CF8A-type | Same chemistry but ferrite balanced to a higher level for greater strength where a stronger casting is specified. | 285 | 570 | 45 | 155 HB | 2.4 % IACS |
What is 1.3955 CENTRIFUGAL?
1.3955 CENTRIFUGAL is 1.3955 supplied in the CENTRIFUGAL condition — pipe and cylinder forms with denser, finer structure and higher strength than static castings. 1.3955 CENTRIFUGAL has a yield strength of 275 MPa (39.9 ksi) and a tensile strength of 545 MPa (79 ksi) — weaker than 77% of stainless steel grades. Elongation at break is 45% and the elastic modulus is 193 GPa (28 Msi). 1.3955 CENTRIFUGAL 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). ST is the default condition FabDigit quotes; CENTRIFUGAL is available on request or by drawing note.
Advantages
- Tough — resists crack growth — 200 MPa·√m (182 ksi·√in), better than 86% of stainless steel grades
- Ductile — tolerates forming and impact — 45%, better than 76% of stainless steel grades
Limitations
- Limited formability — 22/100, worse than 82% of stainless steel grades
- Hard to polish — 60/100, worse than 80% of stainless steel grades
- Low strength — 275 MPa (39.9 ksi), worse than 77% of stainless steel grades
1.3955 CENTRIFUGAL properties
Typical room-temperature values for 1.3955 CENTRIFUGAL; 22 are specific to this condition. Other listed values are 1.3955 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.3955 CENTRIFUGAL 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
1.3955 CENTRIFUGAL has a yield strength of 275 MPa (39.9 ksi) and a tensile strength of 545 MPa (79 ksi) — weaker than 77% of stainless steel grades. Elongation at break is 45% and the elastic modulus is 193 GPa (28 Msi).
Thermal6
1.3955 CENTRIFUGAL 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
1.3955 CENTRIFUGAL conducts electricity at 2.3 % IACS, better than 55% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (63/100), better than 53% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.3955 CENTRIFUGAL takes about 58 MJ of energy and emits 4.2 kg of CO₂ — more than 66% of stainless steel grades. Typical recycled content is 70%.
Manufacturability8
1.3955 CENTRIFUGAL's machinability is fair (38/100, better than 63% of stainless steel grades); weldability very good (75/100); formability poor (22/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.3955 CENTRIFUGAL
Is 1.3955 easy to machine?
Gummy and work-hardening: use sharp positive-rake carbide, heavy positive feed to cut under the hardened skin, ~60–110 m/min, flood coolant; avoid dwelling.
Can 1.3955 be welded?
Readily welded with ER308/E308 (or 308L for as-welded corrosion service) by GTAW/SMAW; no preheat, keep interpass below ~150 °C and post-weld solution anneal for critical corrosion duty.
Can 1.3955 be formed, bent or molded?
Sand, investment and centrifugal casting all suitable; good fluidity with ~2.0–2.5 % solidification shrinkage — feed heavy sections generously and control ferrite (FN 5–15) to avoid hot tearing.
What surface finishes work on 1.3955?
Pickle and passivate (ASTM A967) or shot blast + electropolish; cannot be anodized, and casting skin porosity limits mirror polishing.
1.3955 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 A743 CF8 limit; EN GX12CrNi18-11 allows up to ~0.15 C | ≤ 0.08 | 0.06 |
| Mn | ≤ 1.5 | 0.8 |
| Sihigh Si aids fluidity | ≤ 2 | 1.2 |
| P | ≤ 0.04 | 0.03 |
| S | ≤ 0.04 | 0.02 |
| Cr | 18 – 21 | 19.5 |
| Ni | 8 – 11 | 9.5 |
| Moresidual only | ≤ 0.5 | 0.2 |
| Fe | balance | — |
1.3955 CENTRIFUGAL — frequently asked
What is 1.3955 CENTRIFUGAL used for?
1.3955 CENTRIFUGAL is typically used for valve bodies, pump casings and process piping fittings. In short: general-purpose cast 304; service to 760 °C; widely available casting grade.
What is the yield strength of 1.3955 CENTRIFUGAL?
1.3955 CENTRIFUGAL has a typical yield strength of 275 MPa (39.9 ksi) and a tensile strength of 545 MPa (79 ksi) — weaker than 77% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is 1.3955 CENTRIFUGAL easy to machine?
Not especially — machinability is rated fair (38/100, better than 63% of stainless steel grades). Gummy and work-hardening: use sharp positive-rake carbide, heavy positive feed to cut under the hardened skin, ~60–110 m/min, flood coolant; avoid dwelling.
Can 1.3955 CENTRIFUGAL be welded?
Yes — weldability is rated very good (75/100). Readily welded with ER308/E308 (or 308L for as-welded corrosion service) by GTAW/SMAW; no preheat, keep interpass below ~150 °C and post-weld solution anneal for critical corrosion duty.
What surface finishes work on 1.3955 CENTRIFUGAL?
Pickle and passivate (ASTM A967) or shot blast + electropolish; cannot be anodized, and casting skin porosity limits mirror polishing.
Can 1.3955 CENTRIFUGAL be formed, bent or molded?
Sand, investment and centrifugal casting all suitable; good fluidity with ~2.0–2.5 % solidification shrinkage — feed heavy sections generously and control ferrite (FN 5–15) to avoid hot tearing.
What is the maximum service temperature of 1.3955 CENTRIFUGAL?
1.3955 CENTRIFUGAL 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 1.3955-ST and 1.3955-CF8A?
ST is the default condition — standard supply condition for all corrosion-service castings; dissolves carbides and restores maximum corrosion resistance and ductility. CF8A: same chemistry but ferrite balanced to a higher level for greater strength where a stronger casting is specified. Yield strength is 255 MPa in ST versus 285 MPa in CF8A.
Sources
- ASTM A743/A743M — Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application (grade CF8) — ASTM International (2019)
- ASTM A351/A351M — Castings, Austenitic, for Pressure-Containing Parts (CF8, CF8A) — ASTM International (2018)
- EN 10213 — Steel castings for pressure purposes — CEN (2016)
- ASM Specialty Handbook: Stainless Steels — ASM International (1994)
- Steel Castings Handbook, 6th ed. — Steel Founders' Society of America / ASM (1995)
- ASM Handbook Vol.13B — Corrosion: Materials — ASM International (2005)
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.