Stainless Steel 1.4552
EN 1.4552 · UNS J92710 · ASTM A351 CF8C
1.4552 (GX5CrNiNb19-11, A351 CF8C, J92710) is a niobium-stabilized cast austenitic stainless steel, the EN counterpart of cast 347.
Reference datasheet — 1.4552 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 HT condition
1.4552 tempers and conditions
1.4552 is supplied in 5 conditions, soft to hard. HT is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
HTDefault Solution heat treated and quenched | Standard commercial supply condition: ≥1040 °C solution treat and rapid quench, giving fully dissolved matrix with maximum ductility and corrosion resistance. | 250 | 530 | 39 | 149 HB | — |
hot isostatically pressed then solution heat treated | Specified for pressure-critical or radiographically demanding castings; HIP closes internal shrinkage porosity and raises ductility, fatigue and toughness. | 255 | 545 | 45 | 149 HB | 2.4 % IACS |
solution treated then stabilize annealed (approx. 885–925 °C, air cool) | Choose for long-term 425–815 °C service or highly aggressive nitric/polythionic acid duty, where carbon is deliberately tied up as NbC before service. | 260 | 540 | 35 | 155 HB | 2.4 % IACS |
As fabricated | Use only for non-critical, non-corrosive, low-temperature parts; interdendritic carbides and casting stresses remain, so intergranular corrosion resistance is not guaranteed. | 265 | 520 | 30 | 160 HB | 2.4 % IACS |
Centrifugally cast, solution heat treated | Pick for high-temperature piping and tube shells: directional grain structure and dense wall give slightly higher strength than static castings. | 270 | 550 | 35 | 155 HB | 2.4 % IACS |
What is 1.4552?
1.4552 (GX5CrNiNb19-11, A351 CF8C, J92710) is a niobium-stabilized cast austenitic stainless steel, the EN counterpart of cast 347. The Nb addition ties up carbon so weld heat and long elevated-temperature exposure do not sensitize the structure, which is why it is used for hot valve bodies and furnace hardware as sand or investment castings, heat treated or stabilized. Default properties are 250 MPa yield, 530 MPa tensile, 39 % elongation and 149 HB (80 HRB), with service to 815 °C. Without molybdenum, chloride corrosion resistance is only moderate (score 66); use 1.4581 (stabilized CF8M) where Mo is required. 1.4552 has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,400°C (2,552 °F). 1.4552 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 530 MPa (76.9 ksi) — weaker than 91% of stainless steel grades. Elongation at break is 39% and the elastic modulus is 193 GPa (28 Msi).
What is 1.4552 used for?
- high-temperature valve bodies
- exhaust system castings
- furnace hardware
Advantages
- High service temperature — 815°C (1,499 °F), better than 77% of stainless steel grades
- Low embodied carbon — 3.8 kg CO₂/kg, better than 77% of stainless steel grades
Limitations
- Low strength — 250 MPa (36.3 ksi), worse than 91% of stainless steel grades
- Hard to polish — 55/100, worse than 89% of stainless steel grades
- Limited formability — 25/100, worse than 78% of stainless steel grades
1.4552 properties
Typical room-temperature values for 1.4552-HT; bars are the position among stainless steel grades.
Physical3
1.4552 has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Mechanical16
1.4552 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 530 MPa (76.9 ksi) — weaker than 91% of stainless steel grades. Elongation at break is 39% and the elastic modulus is 193 GPa (28 Msi).
Thermal6
1.4552 is rated for continuous service to 815°C (1,499 °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 16.9 µm/m·K (9.39 µin/in·°F).
Electrical3
1.4552 conducts electricity at 2.4 % IACS, better than 67% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (66/100), better than 59% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4552 takes about 55 MJ of energy and emits 3.8 kg of CO₂ — more than 50% of stainless steel grades. Typical recycled content is 80%.
Manufacturability8
1.4552's machinability is fair (35/100, better than 51% of stainless steel grades); weldability very good (78/100); formability poor (25/100).
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. 1.4552 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4552
Is 1.4552 easy to machine?
Work-hardens rapidly — use rigid setups, positive-rake carbide, heavy constant feed, low-to-moderate speed and flood coolant; avoid dwelling to prevent glazing.
Can 1.4552 be welded?
Very good with GTAW/SMAW using ER347/E347 (or 308L for low-temperature service); no post-weld solution anneal needed thanks to Nb stabilization, but limit heat input and keep interpass low to avoid hot cracking.
Can 1.4552 be formed, bent or molded?
Sand or investment cast with generous risering and 2–2.5% shrink allowance; feed hot spots well and control delta ferrite (FN 5–15) to reduce hot tearing.
1.4552 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 1.4552 limits C to 0.07 max | ≤ 0.08 | 0.05 |
| SiEN 10213: 1.5 max | ≤ 2 | 1.2 |
| Mn | ≤ 1.5 | 1 |
| P | ≤ 0.04 | 0.03 |
| SEN: 0.030 max | ≤ 0.04 | 0.02 |
| CrEN 1.4552: 18.0–20.0 | 18 – 21 | 19.5 |
| NiEN 1.4552: 9.0–11.0 | 9 – 12 | 10 |
| Moresidual | ≤ 0.5 | 0.2 |
| NbNb ≥ 8×C (A351); Nb+Ta permitted | 0.4 – 1 | 0.7 |
| Fe | balance |
What surface finishes work on 1.4552?
Pickle and passivate (ASTM A967) or electropolish after grinding to restore the chromium oxide film; shot blast with stainless media only — never carbon steel grit.
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 1.4552 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
How much does 1.4552 cost?
1.4552 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.
1.4552 — frequently asked
What is 1.4552 used for?
1.4552 is typically used for high-temperature valve bodies, exhaust system castings and furnace hardware. In short: stabilized cast 347; 815 °C service temperature; no post-weld anneal needed.
What is the yield strength of 1.4552?
1.4552 has a typical yield strength of 250 MPa (36.3 ksi) and a tensile strength of 530 MPa (76.9 ksi) — weaker than 91% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is 1.4552 easy to machine?
Not especially — machinability is rated fair (35/100, better than 51% of stainless steel grades). Work-hardens rapidly — use rigid setups, positive-rake carbide, heavy constant feed, low-to-moderate speed and flood coolant; avoid dwelling to prevent glazing.
Can 1.4552 be welded?
Yes — weldability is rated very good (78/100). Very good with GTAW/SMAW using ER347/E347 (or 308L for low-temperature service); no post-weld solution anneal needed thanks to Nb stabilization, but limit heat input and keep interpass low to avoid hot cracking.
What surface finishes work on 1.4552?
Pickle and passivate (ASTM A967) or electropolish after grinding to restore the chromium oxide film; shot blast with stainless media only — never carbon steel grit.
Can 1.4552 be formed, bent or molded?
Sand or investment cast with generous risering and 2–2.5% shrink allowance; feed hot spots well and control delta ferrite (FN 5–15) to reduce hot tearing.
What is the maximum service temperature of 1.4552?
1.4552 is rated for continuous use to about 815°C (1,499 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4552-HT and 1.4552-CF?
HT is the default condition — standard commercial supply condition: ≥1040 °C solution treat and rapid quench, giving fully dissolved matrix with maximum ductility and corrosion resistance. CF: pick for high-temperature piping and tube shells: directional grain structure and dense wall give slightly higher strength than static castings. Yield strength is 250 MPa in HT versus 270 MPa in CF.
How much does 1.4552 cost?
1.4552 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 (CF8C) — ASTM International (2022)
- EN 10213 — Steel castings for pressure purposes (GX5CrNiNb19-11, 1.4552) — CEN (2016)
- ASTM A451/A451M — Centrifugally Cast Austenitic Steel Pipe (CPF8C) — ASTM International (2021)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- Steel Castings Handbook, 6th ed. — Steel Founders' Society of America / ASM (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.