Stainless Steel ZG0Cr18Ni12Mo2Ti-SA
Heat-treated state
ASTM CF3M
SA = stabilizing anneal 850–900 °C after solution treatment
Choose when the casting will see prolonged 450–850 °C service or heavy weld repair and maximum intergranular-corrosion immunity is required.
Values for the SA condition
Other ZG0Cr18Ni12Mo2Ti tempers and conditions
ZG0Cr18Ni12Mo2Ti is listed in 4 conditions; see the grade overview at ZG0Cr18Ni12Mo2Ti.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As fabricated | Cheapest condition for non-critical, mildly corrosive service where the full solution treatment cost is not justified. | 225 | 480 | 25 | 163 HB | 2.3 % IACS |
STDefault Solution annealed | Standard supply condition per GB/T 2100 — maximum corrosion resistance, ductility and impact toughness. | 235 | 520 | 40 | 150 HB | — |
SAThis page Stabilizing anneal 850–900 °C after solution treatment | Choose when the casting will see prolonged 450–850 °C service or heavy weld repair and maximum intergranular-corrosion immunity is required. | 240 | 515 | 34 | 155 HB | 2.3 % IACS |
hot isostatically pressed then solution treated | For pressure-containing or fatigue-critical castings where microporosity must be closed (subsea valve bodies, pump casings). | 250 | 545 | 46 | 150 HB | 2.3 % IACS |
What is ZG0Cr18Ni12Mo2Ti-SA?
ZG0Cr18Ni12Mo2Ti-SA is ZG0Cr18Ni12Mo2Ti heat treated to SA — choose when the casting will see prolonged 450–850 °C service or heavy weld repair and maximum intergranular-corrosion immunity is required. ZG0Cr18Ni12Mo2Ti-SA has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 515 MPa (74.7 ksi) — weaker than 96% of stainless steel grades. Elongation at break is 34% and the elastic modulus is 193 GPa (28 Msi). ZG0Cr18Ni12Mo2Ti-SA has a density of 7.95 g/cm³ (0.287 lb/in³), heavier than 81% of stainless steel grades. It melts at 1,390°C (2,534 °F). ST is the default condition FabDigit quotes; SA is available on request or by drawing note.
Advantages
- Readily welded — 88/100, better than 91% of stainless steel grades
- High service temperature — 850°C (1,562 °F), better than 80% of stainless steel grades
- Good corrosion resistance — 74/100, better than 78% of stainless steel grades
Limitations
- Low strength — 240 MPa (34.8 ksi), worse than 96% of stainless steel grades
- Limited formability — 24/100, worse than 82% of stainless steel grades
ZG0Cr18Ni12Mo2Ti-SA properties
Typical room-temperature values for ZG0Cr18Ni12Mo2Ti-SA; 22 are specific to this condition. Other listed values are ZG0Cr18Ni12Mo2Ti reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
ZG0Cr18Ni12Mo2Ti-SA has a density of 7.95 g/cm³ (0.287 lb/in³), heavier than 81% of stainless steel grades. It melts at 1,390°C (2,534 °F).
Mechanical16
ZG0Cr18Ni12Mo2Ti-SA has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 515 MPa (74.7 ksi) — weaker than 96% of stainless steel grades. Elongation at break is 34% and the elastic modulus is 193 GPa (28 Msi).
Thermal6
ZG0Cr18Ni12Mo2Ti-SA is rated for continuous service to 850°C (1,562 °F). It conducts heat at 14.5 W/m·K (8.38 BTU/hr·ft·°F), worse than 72% of stainless steel grades. Thermal expansion is 16 µm/m·K (8.89 µin/in·°F).
Electrical3
ZG0Cr18Ni12Mo2Ti-SA conducts electricity at 2.3 % IACS, better than 55% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is very good (74/100), better than 78% of stainless steel grades.
Sustainability4
Producing a kilogram of ZG0Cr18Ni12Mo2Ti-SA takes about 55 MJ of energy and emits 5 kg of CO₂ — more than 50% of stainless steel grades. Typical recycled content is 70%.
Manufacturability7
ZG0Cr18Ni12Mo2Ti-SA's machinability is fair (36/100, better than 57% of stainless steel grades); weldability excellent (88/100); formability poor (24/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with ZG0Cr18Ni12Mo2Ti-SA
Is ZG0Cr18Ni12Mo2Ti easy to machine?
Gummy and strongly work-hardening — use rigid setups, sharp positive-rake carbide, low speed/high feed, flood coolant and avoid dwelling; Ti(C,N) inclusions accelerate flank wear.
Can ZG0Cr18Ni12Mo2Ti be welded?
Excellent — weld with ER316L/ER318 (Nb or Ti bearing) filler, low heat input, no preheat, interpass ≤150 °C; Ti stabilization allows as-welded chloride service without re-solution treatment.
Can ZG0Cr18Ni12Mo2Ti be formed, bent or molded?
Sand or investment cast with generous risering (long freezing range, ~2.2 % solidification shrinkage); protect the Ti addition with argon cover or vacuum melting to avoid burn-off and dross.
What surface finishes work on ZG0Cr18Ni12Mo2Ti?
Pickle-and-passivate (HNO₃/HF) after heat treatment to remove scale and restore the passive film; shot blast with stainless or ceramic media only; can be electropolished, but casting porosity and Ti stringers limit mirror finishes.
ZG0Cr18Ni12Mo2Ti 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'0Cr' class low carbon; many foundries hold ≤0.03 for CF3M equivalence | ≤ 0.08 | 0.05 |
| Si | ≤ 1.5 | 1 |
| Mn | ≤ 1.5 | 1 |
| P | ≤ 0.04 | 0.03 |
| S | ≤ 0.03 | 0.02 |
| Cr | 17 – 20 | 18.5 |
| Ni | 11 – 14 | 12.5 |
| Mo | 2 – 3 | 2.5 |
| Ti≥8×C for stabilization | 0.4 – 1 | 0.55 |
| Fe | balance | — |
ZG0Cr18Ni12Mo2Ti-SA — frequently asked
What is ZG0Cr18Ni12Mo2Ti-SA used for?
ZG0Cr18Ni12Mo2Ti-SA is typically used for welded seawater valve castings, pharmaceutical process pump housings and brine handling equipment. In short: ti-stabilized cast CF3M; as-welded chloride service; weldability score 88.
What is the yield strength of ZG0Cr18Ni12Mo2Ti-SA?
ZG0Cr18Ni12Mo2Ti-SA has a typical yield strength of 240 MPa (34.8 ksi) and a tensile strength of 515 MPa (74.7 ksi) — weaker than 96% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is ZG0Cr18Ni12Mo2Ti-SA easy to machine?
Not especially — machinability is rated fair (36/100, better than 57% of stainless steel grades). Gummy and strongly work-hardening — use rigid setups, sharp positive-rake carbide, low speed/high feed, flood coolant and avoid dwelling; Ti(C,N) inclusions accelerate flank wear.
Can ZG0Cr18Ni12Mo2Ti-SA be welded?
Yes — weldability is rated excellent (88/100). Excellent — weld with ER316L/ER318 (Nb or Ti bearing) filler, low heat input, no preheat, interpass ≤150 °C; Ti stabilization allows as-welded chloride service without re-solution treatment.
What surface finishes work on ZG0Cr18Ni12Mo2Ti-SA?
Pickle-and-passivate (HNO₃/HF) after heat treatment to remove scale and restore the passive film; shot blast with stainless or ceramic media only; can be electropolished, but casting porosity and Ti stringers limit mirror finishes.
Can ZG0Cr18Ni12Mo2Ti-SA be formed, bent or molded?
Sand or investment cast with generous risering (long freezing range, ~2.2 % solidification shrinkage); protect the Ti addition with argon cover or vacuum melting to avoid burn-off and dross.
What is the maximum service temperature of ZG0Cr18Ni12Mo2Ti-SA?
ZG0Cr18Ni12Mo2Ti-SA is rated for continuous use to about 850°C (1,562 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between ZG0Cr18Ni12Mo2Ti-ST and ZG0Cr18Ni12Mo2Ti ST-HIP?
ST is the default condition — standard supply condition per GB/T 2100 — maximum corrosion resistance, ductility and impact toughness. ST-HIP: for pressure-containing or fatigue-critical castings where microporosity must be closed (subsea valve bodies, pump casings). Yield strength is 235 MPa in ST versus 250 MPa in ST-HIP.
Sources
- ASTM A351/A351M — Castings, Austenitic, for Pressure-Containing Parts (CF3M) — ASTM International (2022)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels, and High-Performance Alloys (Cast Stainless Steels) — ASM International (1990)
- 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.