Stainless Steel Zeron 100 · heat-treated state
Stainless Steel Zeron 100 Cast 5A
Properties of the Cast 5A condition, compared with the other Zeron 100 tempers.
Pump casings, impellers and valve bodies; lower yield and toughness than wrought, and more sensitive to intermetallic phase in thick sections.
What is Zeron 100 Cast 5A?
Zeron 100 Cast 5A is Zeron 100 heat treated to Cast 5A — pump casings, impellers and valve bodies; lower yield and toughness than wrought, and more sensitive to intermetallic phase in thick sections. Zeron 100 Cast 5A has a yield strength of 530 MPa (76.9 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 81% of stainless steel grades. Elongation at break is 28% and the elastic modulus is 200 GPa (29 Msi). Zeron 100 Cast 5A has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,350°C (2,462 °F). Solution Annealed is the default condition FabDigit quotes; Cast 5A is available on request or by drawing note.
Advantages
- Good corrosion resistance — 82/100, better than 90% of stainless steel grades
- High strength — 530 MPa (76.9 ksi), better than 81% of stainless steel grades
Limitations
- Limited service temperature — 280°C (536 °F), worse than 96% of stainless steel grades
- Difficult to machine — 25/100, worse than 88% of stainless steel grades
- Low electrical conductivity — 2 % IACS, worse than 78% of stainless steel grades
Zeron 100 Cast 5A properties
Typical room-temperature values for Zeron 100 Cast 5A — 8 properties are specific to this condition; the rest are grade-level values shared by every Zeron 100 temper. Each bar shows where the value sits among the stainless steel grades in FabDigit's library — further right is higher.
Physical3
Zeron 100 Cast 5A has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,350°C (2,462 °F).
Mechanical16
Zeron 100 Cast 5A has a yield strength of 530 MPa (76.9 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 81% of stainless steel grades. Elongation at break is 28% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
Zeron 100 Cast 5A is rated for continuous service to 280°C (536 °F). It conducts heat at 14.7 W/m·K (8.49 BTU/hr·ft·°F), worse than 69% of stainless steel grades. Thermal expansion is 12.8 µm/m·K (7.11 µin/in·°F).
Electrical3
Zeron 100 Cast 5A conducts electricity at 2 % IACS, worse than 78% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is very good (82/100), better than 90% of stainless steel grades.
Sustainability4
Producing a kilogram of Zeron 100 Cast 5A takes about 58 MJ of energy and emits 4.5 kg of CO₂ — more than 65% of stainless steel grades. Typical recycled content is 55%.
Manufacturability7
Zeron 100 Cast 5A's machinability is poor (25/100, worse than 88% of stainless steel grades); weldability good (65/100); formability fair (45/100).
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Other Zeron 100 tempers and conditions
Zeron 100 is also supplied in 6 other conditions. The full side-by-side table is on the Zeron 100 overview.
- Solution AnnealedDefaultStandard supply condition for plate, pipe and bar — balanced ~50/50 ferrite/austenite, no intermetallics, maximum corrosion resistance.620 MPa yield · 25 HRC
- Cold DrawnChoose for small-diameter bar, fasteners and shafting where higher yield strength and better surface/tolerance are required.790 MPa yield · 31 HRC
- Cast 5APump casings, impellers and valve bodies; lower yield and toughness than wrought, and more sensitive to intermetallic phase in thick sections.530 MPa yield · 240 HB
Working with Zeron 100 Cast 5A
Is Zeron 100 easy to machine?
Rigid setups, positive-rake carbide, heavy constant feed and flood coolant; surface speeds roughly half those for 316L to avoid work hardening and edge build-up.
Can Zeron 100 be welded?
GTAW/GMAW/SMAW with overalloyed Zeron 100X (25Cr-10Ni-4Mo) filler, heat input ~0.5–1.5 kJ/mm, interpass ≤150 °C, argon+2%N₂ purge; no PWHT — reheat only above 1100 °C followed by water quench.
Can Zeron 100 be formed, bent or molded?
Cold form with ~2× the force of austenitic stainless and generous springback allowance; hot work 1000–1200 °C, never finish below ~950 °C, and always re-solution anneal and quench afterwards.
What surface finishes work on Zeron 100?
Pickle in HNO₃/HF (longer times than 316L) and passivate to restore the chromium-rich film; mechanical polishing and electropolishing both give a bright, easily cleaned surface — no anodizing.
Zeron 100 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 |
|---|---|---|
| C | ≤ 0.03 | 0.02 |
| Mn | ≤ 1 | 0.6 |
| Si | ≤ 1 | 0.4 |
| P | ≤ 0.03 | 0.02 |
| S | ≤ 0.01 | 0 |
| Cr | 24 – 26 | 25 |
| Ni | 6 – 8 | 7 |
| Mo | 3 – 4 | 3.6 |
| Cu | 0.5 – 1 | 0.7 |
| W | 0.5 – 1 | 0.7 |
| NPREN = %Cr + 3.3(%Mo + 0.5%W) + 16%N ≥ 40 | 0.2 – 0.3 | 0.25 |
| Fe | balance | — |
Zeron 100 Cast 5A — frequently asked
What is Zeron 100 Cast 5A used for?
Zeron 100 Cast 5A is typically used for subsea oil and gas components, saltwater pump casings and impellers, valve bodies and manifolds, offshore riser and caisson piping, heat exchanger tubesheets and wellhead and downhole hardware. In short: super-duplex offshore stainless.
What is the yield strength of Zeron 100 Cast 5A?
Zeron 100 Cast 5A has a typical yield strength of 530 MPa (76.9 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 81% of stainless steel grades. Strength varies by condition: see the 7 listed tempers.
Is Zeron 100 Cast 5A easy to machine?
Not especially — machinability is rated poor (25/100, worse than 88% of stainless steel grades). Rigid setups, positive-rake carbide, heavy constant feed and flood coolant; surface speeds roughly half those for 316L to avoid work hardening and edge build-up.
Can Zeron 100 Cast 5A be welded?
Yes — weldability is rated good (65/100). GTAW/GMAW/SMAW with overalloyed Zeron 100X (25Cr-10Ni-4Mo) filler, heat input ~0.5–1.5 kJ/mm, interpass ≤150 °C, argon+2%N₂ purge; no PWHT — reheat only above 1100 °C followed by water quench.
What surface finishes work on Zeron 100 Cast 5A?
Pickle in HNO₃/HF (longer times than 316L) and passivate to restore the chromium-rich film; mechanical polishing and electropolishing both give a bright, easily cleaned surface — no anodizing.
Can Zeron 100 Cast 5A be formed, bent or molded?
Cold form with ~2× the force of austenitic stainless and generous springback allowance; hot work 1000–1200 °C, never finish below ~950 °C, and always re-solution anneal and quench afterwards.
What is the maximum service temperature of Zeron 100 Cast 5A?
Zeron 100 Cast 5A is rated for continuous use to about 280°C (536 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Zeron 100 Solution Annealed and Zeron 100 Forged?
Solution Annealed is the default condition — standard supply condition for plate, pipe and bar — balanced ~50/50 ferrite/austenite, no intermetallics, maximum corrosion resistance. Forged: valve bodies, flanges and subsea components; verify section-size cooling rate and G48 pitting test on heavy forgings. Yield strength is 620 MPa in Solution Annealed versus 610 MPa in Forged.
Can FabDigit make parts in Zeron 100 Cast 5A?
Yes — Zeron 100 Cast 5A is available for CNC machining and sheet metal with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- ASTM A240/A240M — Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip (S32760) — ASTM International (2023)
- ASTM A182/A182M F55 Forged Fittings and Flanges — ASTM International (2022)
- ASTM A995/A995M Grade 5A (CD3MWCuN) Castings — ASTM International (2020)
- EN 10088-2 / 1.4501 X2CrNiMoCuWN25-7-4 — CEN (2014)
- ZERON 100 Super Duplex Stainless Steel data sheet — Rolled Alloys / Weir Materials (2022)
- ASM Handbook Vol. 1: Properties and Selection — Duplex Stainless Steels — ASM International (1990)
- Practical Guidelines for the Fabrication of Duplex Stainless Steels — IMOA (2014)
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.