Stainless Steel 1.4527 SA+HIP
Heat-treated state
EN 1.4527
SA+HIP = hot isostatically pressed then solution annealed
Choose for thick-section or radiographic-quality pump/valve castings where microporosity must be closed; slightly higher ductility and fatigue life.
Values for the SA+HIP condition
Other 1.4527 tempers and conditions
1.4527 is listed in 5 conditions; see the grade overview at 1.4527.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
SADefault Solution annealed | Standard as-supplied condition for all pressure-retaining CN7M / 1.4527 castings; maximum corrosion resistance and ductility. | 215 | 480 | 45 | 150 HB | 1.6 % IACS |
SA+HIPThis page Hot isostatically pressed then solution annealed | Choose for thick-section or radiographic-quality pump/valve castings where microporosity must be closed; slightly higher ductility and fatigue life. | 225 | 500 | 50 | 150 HB | 1.6 % IACS |
Spheroidize annealed | Only for non-corrosive, non-pressure hardware — interdendritic carbides and Cr-depleted zones sharply reduce acid resistance and ductility. | 230 | 470 | 25 | 165 HB | 1.6 % IACS |
As-welded deposit | Condition after minor foundry weld repair with Nb-stabilized filler when post-weld solution annealing is impractical; acceptable only for mild service. | 230 | 470 | 30 | 170 HB | 1.6 % IACS |
Centrifugally cast, solution annealed | Pipe, sleeve and bushing forms; the directionally solidified, denser wall gives modestly higher strength than static castings. | 235 | 510 | 42 | 155 HB | 1.6 % IACS |
What is 1.4527 SA+HIP?
1.4527 SA+HIP is 1.4527 heat treated to SA+HIP — choose for thick-section or radiographic-quality pump/valve castings where microporosity must be closed; slightly higher ductility and fatigue life. 1.4527 SA+HIP has a yield strength of 225 MPa (32.6 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 99% of stainless steel grades. Elongation at break is 50% and the elastic modulus is 195 GPa (28.3 Msi). 1.4527 SA+HIP has a density of 8 g/cm³ (0.289 lb/in³), heavier than 92% of stainless steel grades. It melts at 1,370°C (2,498 °F). SA is the default condition FabDigit quotes; SA+HIP is available on request or by drawing note.
Advantages
- Tough — resists crack growth — 220 MPa·√m (200.2 ksi·√in), better than 97% of stainless steel grades
- Ductile — tolerates forming and impact — 50%, better than 90% of stainless steel grades
- Good corrosion resistance — 80/100, better than 88% of stainless steel grades
Limitations
- Low strength — 225 MPa (32.6 ksi), worse than 99% of stainless steel grades
- Low electrical conductivity — 1.6 % IACS, worse than 99% of stainless steel grades
- Poor heat conductor — 12.3 W/m·K (7.11 BTU/hr·ft·°F), worse than 91% of stainless steel grades
- High embodied carbon — 5.6 kg CO₂/kg, worse than 83% of stainless steel grades
- Hard to polish — 60/100, worse than 80% of stainless steel grades
1.4527 SA+HIP properties
Typical room-temperature values for 1.4527 SA+HIP; 22 are specific to this condition. Other listed values are 1.4527 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4527 SA+HIP has a density of 8 g/cm³ (0.289 lb/in³), heavier than 92% of stainless steel grades. It melts at 1,370°C (2,498 °F).
Mechanical16
1.4527 SA+HIP has a yield strength of 225 MPa (32.6 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 99% of stainless steel grades. Elongation at break is 50% and the elastic modulus is 195 GPa (28.3 Msi).
Thermal6
1.4527 SA+HIP is rated for continuous service to 425°C (797 °F). It conducts heat at 12.3 W/m·K (7.11 BTU/hr·ft·°F), worse than 91% of stainless steel grades. Thermal expansion is 14.8 µm/m·K (8.22 µin/in·°F).
Electrical3
1.4527 SA+HIP conducts electricity at 1.6 % IACS, worse than 99% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is very good (80/100), better than 88% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4527 SA+HIP takes about 78 MJ of energy and emits 5.6 kg of CO₂ — more than 87% of stainless steel grades. Typical recycled content is 55%.
Manufacturability8
1.4527 SA+HIP's machinability is poor (32/100, worse than 62% of stainless steel grades); weldability very good (72/100); formability poor (32/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4527 SA+HIP
Is 1.4527 easy to machine?
Gummy and strongly work-hardening — use rigid setups, positive-rake carbide, low speed (30–60 m/min) with heavy uninterrupted feeds and flood coolant to keep the cut below the hardened skin.
Can 1.4527 be welded?
Readily welded by GTAW/SMAW with Nb-stabilized 20Cb-3 (ER320LR/E320LR) filler, low heat input, no preheat; full solution anneal and water quench after major repair restores acid resistance.
Can 1.4527 be formed, bent or molded?
A casting grade — control pouring temperature (~1520–1560 °C) and provide large risers for the wide freezing range; avoid heavy section transitions to limit shrinkage porosity.
What surface finishes work on 1.4527?
Pickle and passivate (nitric or nitric-HF) after heat treatment or grinding to remove scale and iron pickup; electropolishing gives the cleanest surface for acid service. No anodizing.
1.4527 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 1.4527 limits C ≤ 0.06 | ≤ 0.07 | 0.04 |
| SiEN grade ≤ 1.0 | ≤ 1.5 | 0.9 |
| MnEN grade ≤ 2.0 | ≤ 1.5 | 0.9 |
| P | ≤ 0.04 | 0.03 |
| S | ≤ 0.04 | 0.02 |
| Cr | 19 – 22 | 20.5 |
| Ni | 27.5 – 30.5 | 29 |
| Mo | 2 – 3 | 2.5 |
| Cukey addition for sulfuric acid resistance | 3 – 4 | 3.5 |
| Febalance, approx. 42–45 % | balance | — |
1.4527 SA+HIP — frequently asked
What is 1.4527 SA+HIP used for?
1.4527 SA+HIP is typically used for sulfuric acid handling equipment, acid pump casings and impellers, chemical process castings, acid valve bodies, pickling line fittings and fertilizer plant components. In short: concentrated sulfuric acid castings; alloy 20 type casting; high elongation, low strength.
What is the yield strength of 1.4527 SA+HIP?
1.4527 SA+HIP has a typical yield strength of 225 MPa (32.6 ksi) and a tensile strength of 500 MPa (72.5 ksi) — weaker than 99% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is 1.4527 SA+HIP easy to machine?
Not especially — machinability is rated poor (32/100, worse than 62% of stainless steel grades). Gummy and strongly work-hardening — use rigid setups, positive-rake carbide, low speed (30–60 m/min) with heavy uninterrupted feeds and flood coolant to keep the cut below the hardened skin.
Can 1.4527 SA+HIP be welded?
Yes — weldability is rated very good (72/100). Readily welded by GTAW/SMAW with Nb-stabilized 20Cb-3 (ER320LR/E320LR) filler, low heat input, no preheat; full solution anneal and water quench after major repair restores acid resistance.
What surface finishes work on 1.4527 SA+HIP?
Pickle and passivate (nitric or nitric-HF) after heat treatment or grinding to remove scale and iron pickup; electropolishing gives the cleanest surface for acid service. No anodizing.
Can 1.4527 SA+HIP be formed, bent or molded?
A casting grade — control pouring temperature (~1520–1560 °C) and provide large risers for the wide freezing range; avoid heavy section transitions to limit shrinkage porosity.
What is the maximum service temperature of 1.4527 SA+HIP?
1.4527 SA+HIP is rated for continuous use to about 425°C (797 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4527-SA and 1.4527-CF?
SA is the default condition — standard as-supplied condition for all pressure-retaining CN7M / 1.4527 castings; maximum corrosion resistance and ductility. CF: pipe, sleeve and bushing forms; the directionally solidified, denser wall gives modestly higher strength than static castings. Yield strength is 215 MPa in SA versus 235 MPa in CF.
Sources
- ASTM A744/A744M — Castings, Iron-Chromium-Nickel, Corrosion Resistant, for Severe Service (CN7M) — ASTM International (2023)
- ASTM A743/A351 cast corrosion-resistant grades — ASTM International (2021)
- EN 10213 / EN 10283 — Steel castings for pressure and corrosion-resistant purposes (GX4NiCrCuMo30-20-4, 1.4527) — CEN (2016)
- ASM Handbook Vol. 1: Properties and Selection — Cast Stainless Steels — ASM International (1990)
- Alloy 20 / N08020 physical and corrosion data — alloy producers (Carpenter, Sandvik) (2022)
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.