Stainless Steel ZG1Cr18Ni12Mo2Ti CENT-ST
Finish state
ASTM CF8M
CENT-ST = centrifugally cast, solution treated
Tubes/sleeves/rings: denser, finer structure gives slightly higher strength and toughness than static castings.
Values for the CENT-ST condition
Other ZG1Cr18Ni12Mo2Ti tempers and conditions
ZG1Cr18Ni12Mo2Ti is listed in 4 conditions; see the grade overview at ZG1Cr18Ni12Mo2Ti.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
STDefault Solution annealed | Standard supply condition for all pressure and corrosion service — maximum corrosion resistance and ductility. | 245 | 520 | 38 | 160 HB | — |
As fabricated | Only for non-critical, non-corrosive, low-stress parts; carbide networks and residual stresses remain. | 250 | 480 | 22 | 175 HB | 2.3 % IACS |
Solution treated plus stabilizing anneal | Choose for long-term 450–750 °C exposure or highly aggressive acid service where maximum immunity to intergranular attack is required. | 250 | 515 | 33 | 165 HB | 2.3 % IACS |
CENT-STThis page Centrifugally cast, solution treated | Tubes/sleeves/rings: denser, finer structure gives slightly higher strength and toughness than static castings. | 260 | 550 | 40 | 165 HB | 2.3 % IACS |
What is ZG1Cr18Ni12Mo2Ti CENT-ST?
ZG1Cr18Ni12Mo2Ti CENT-ST is ZG1Cr18Ni12Mo2Ti supplied in the CENT-ST condition — tubes/sleeves/rings: denser, finer structure gives slightly higher strength and toughness than static castings. ZG1Cr18Ni12Mo2Ti CENT-ST has a yield strength of 260 MPa (37.7 ksi) and a tensile strength of 550 MPa (79.8 ksi) — weaker than 84% of stainless steel grades. Elongation at break is 40% and the elastic modulus is 195 GPa (28.3 Msi). ZG1Cr18Ni12Mo2Ti CENT-ST has a density of 7.95 g/cm³ (0.287 lb/in³), heavier than 81% of stainless steel grades. It melts at 1,385°C (2,525 °F). ST is the default condition FabDigit quotes; CENT-ST is available on request or by drawing note.
Advantages
- Good corrosion resistance — 73/100, better than 77% of stainless steel grades
Limitations
- Low strength — 260 MPa (37.7 ksi), worse than 84% of stainless steel grades
- Hard to polish — 60/100, worse than 80% of stainless steel grades
ZG1Cr18Ni12Mo2Ti CENT-ST properties
Typical room-temperature values for ZG1Cr18Ni12Mo2Ti CENT-ST; 22 are specific to this condition. Other listed values are ZG1Cr18Ni12Mo2Ti reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
ZG1Cr18Ni12Mo2Ti CENT-ST has a density of 7.95 g/cm³ (0.287 lb/in³), heavier than 81% of stainless steel grades. It melts at 1,385°C (2,525 °F).
Mechanical16
ZG1Cr18Ni12Mo2Ti CENT-ST has a yield strength of 260 MPa (37.7 ksi) and a tensile strength of 550 MPa (79.8 ksi) — weaker than 84% of stainless steel grades. Elongation at break is 40% and the elastic modulus is 195 GPa (28.3 Msi).
Thermal6
ZG1Cr18Ni12Mo2Ti CENT-ST is rated for continuous service to 700°C (1,292 °F). It conducts heat at 15 W/m·K (8.67 BTU/hr·ft·°F), worse than 59% of stainless steel grades. Thermal expansion is 16.5 µm/m·K (9.17 µin/in·°F).
Electrical3
ZG1Cr18Ni12Mo2Ti CENT-ST conducts electricity at 2.3 % IACS, better than 55% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is very good (73/100), better than 77% of stainless steel grades.
Sustainability4
Producing a kilogram of ZG1Cr18Ni12Mo2Ti CENT-ST takes about 53 MJ of energy and emits 4.6 kg of CO₂ — less than 67% of stainless steel grades. Typical recycled content is 70%.
Manufacturability8
ZG1Cr18Ni12Mo2Ti CENT-ST's machinability is poor (33/100, worse than 57% of stainless steel grades); weldability very good (78/100); formability poor (26/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with ZG1Cr18Ni12Mo2Ti CENT-ST
Is ZG1Cr18Ni12Mo2Ti easy to machine?
Gummy and work-hardening like 316 — rigid setups, positive-rake sharp carbide, heavy constant feed, generous flood coolant, avoid dwelling; expect ~40 % of 1212 rates.
Can ZG1Cr18Ni12Mo2Ti be welded?
Readily welded by GTAW/SMAW with 316L/318 (Nb or Ti-bearing) filler; keep interpass low, no preheat and no PWHT needed thanks to Ti stabilization.
Can ZG1Cr18Ni12Mo2Ti be formed, bent or molded?
Sand or investment cast with generous risers and chills (wide freezing range, ~2.2 % shrinkage); always solution treat and water quench after casting.
What surface finishes work on ZG1Cr18Ni12Mo2Ti?
Pickle and passivate (HNO₃ or citric) after grinding/welding; electropolish for hygienic surfaces — no anodizing; plating rarely used.
ZG1Cr18Ni12Mo2Ti 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 |
|---|---|---|
| Clow-carbon grade ('1Cr' = ≤0.10 % C) | ≤ 0.1 | 0.07 |
| Si | ≤ 1.5 | 1 |
| Mn | ≤ 2 | 1.2 |
| P | ≤ 0.04 | 0.03 |
| S | ≤ 0.03 | 0.02 |
| Cr | 17 – 20 | 18.5 |
| Ni | 11 – 14 | 12.5 |
| Mo | 2 – 3 | 2.4 |
| Titypically ≥5×C for stabilization | 0.35 – 0.8 | 0.5 |
| Fe | balance | — |
ZG1Cr18Ni12Mo2Ti CENT-ST — frequently asked
What is ZG1Cr18Ni12Mo2Ti CENT-ST used for?
ZG1Cr18Ni12Mo2Ti CENT-ST is typically used for marine valve castings, chemical pump housings and high-temperature corrosive service castings. In short: mo plus Ti cast austenitic; CF8M equivalent; chloride and heat resistant.
What is the yield strength of ZG1Cr18Ni12Mo2Ti CENT-ST?
ZG1Cr18Ni12Mo2Ti CENT-ST has a typical yield strength of 260 MPa (37.7 ksi) and a tensile strength of 550 MPa (79.8 ksi) — weaker than 84% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is ZG1Cr18Ni12Mo2Ti CENT-ST easy to machine?
Not especially — machinability is rated poor (33/100, worse than 57% of stainless steel grades). Gummy and work-hardening like 316 — rigid setups, positive-rake sharp carbide, heavy constant feed, generous flood coolant, avoid dwelling; expect ~40 % of 1212 rates.
Can ZG1Cr18Ni12Mo2Ti CENT-ST be welded?
Yes — weldability is rated very good (78/100). Readily welded by GTAW/SMAW with 316L/318 (Nb or Ti-bearing) filler; keep interpass low, no preheat and no PWHT needed thanks to Ti stabilization.
What surface finishes work on ZG1Cr18Ni12Mo2Ti CENT-ST?
Pickle and passivate (HNO₃ or citric) after grinding/welding; electropolish for hygienic surfaces — no anodizing; plating rarely used.
Can ZG1Cr18Ni12Mo2Ti CENT-ST be formed, bent or molded?
Sand or investment cast with generous risers and chills (wide freezing range, ~2.2 % shrinkage); always solution treat and water quench after casting.
What is the maximum service temperature of ZG1Cr18Ni12Mo2Ti CENT-ST?
ZG1Cr18Ni12Mo2Ti CENT-ST is rated for continuous use to about 700°C (1,292 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between ZG1Cr18Ni12Mo2Ti-ST and ZG1Cr18Ni12Mo2Ti CENT-ST?
ST is the default condition — standard supply condition for all pressure and corrosion service — maximum corrosion resistance and ductility. CENT-ST: tubes/sleeves/rings: denser, finer structure gives slightly higher strength and toughness than static castings. Yield strength is 245 MPa in ST versus 260 MPa in CENT-ST.
Sources
- GB/T 2100 (general purpose corrosion-resistant steel castings) — SAC / (2017)
- ASTM A351/A351M Castings, Austenitic, for Pressure-Containing Parts (CF8M) — ASTM International (2018)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys (cast stainless steels) — ASM International (1990)
- ASM Specialty Handbook: Stainless Steels — ASM International (1994)
- Machinery's Handbook (machinability ratings) — Industrial Press (2020)
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.