High-chromium-nickel Austenitic Heat-resistant Cast Steel
Zg35cr24ni7sin is a high-chromium-nickel austenitic stainless steel casting grade with excellent corrosion resistance in oxidizing media and superior high-temperature mechanical properties.
High-chromium-nickel Austenitic Heat-resistant Cast Steel
Zg35cr24ni7sin is a high-chromium-nickel austenitic stainless steel casting grade with excellent corrosion resistance in oxidizing media and superior high-temperature mechanical properties.
It is produced using various casting methods including vacuum solid mold casting, centrifugal casting, resin sand casting, silica sol casting, and water glass sand casting. Smelting is carried out in medium frequency induction furnaces, electric arc furnaces, or refining furnaces.
This heat-resistant steel is designed for demanding high-temperature and corrosive environments, offering good thermal fatigue resistance, oxidation resistance, and stability up to extreme temperatures.
High-performance nitrogen-alloyed cast steel for extreme high-temperature, oxidation and abrasive environments.
ZG35Cr24Ni7SiN is a nitrogen-alloyed austenitic heat-resistant cast steel designed for long-term operation under severe thermal and chemical conditions.
Maintains mechanical strength and structural integrity during prolonged exposure to temperatures up to 1050°C.
High chromium and silicon content forms a dense oxide layer, reducing metal loss and maintenance intervals.
Delivers reliable high-temperature performance with lower nickel content, offering better cost efficiency than high-Ni alloys.
| Type | Forms | Dimensions | Processes | Delivery Condition |
|---|---|---|---|---|
| Plates | Plates | 0.08–200 mm (T) × W × L | Forging, Hot/Cold Rolling | Annealed, Solution+Aging, Q+T, Pickled, Shot Blasted |
| Bars | Round, Flat, Square Bar | Φ8–1200 mm × L | Forging, Hot/Cold Rolling, Cast | Black, Rough Turned, Shot Blasted |
| Coils/Strips | Coil/Strip | 0.03–16.0 × 1200 mm | Cold/Hot Rolled | Annealed, Solution+Aging, Q+T, Pickled, Shot Blasted |
| Pipes/Tubes | Seamless/Welded | OD 6–219 mm × WT 0.5–20.0 mm | Hot Extrusion, Cold Drawn, Welded | Annealed, Solution+Aging, Q+T, Pickled |
Typical values for reference. Customized chemical control available upon request.
| Property | Value | Unit |
|---|---|---|
| Tensile Strength Rm | ≥529 | MPa |
| Yield Strength Rp0.2 | ≥929 | MPa |
| Elongation A | 23 | % |
| Reduction of Area Z | 24 | % |
| Impact KV/Ku | 44 | J |
| Brinell Hardness HBW | 441 | - |
Properties shown are typical after solution treatment and aging or other heat treatments (annealing, ausaging, Q+T, etc.).
| Element | Min (%) | Max (%) |
|---|---|---|
| C | 0.30 | 0.40 |
| Si | 1.30 | 2.00 |
| Mn | 0.80 | 1.50 |
| Cr | 23.00 | 25.50 |
| Ni | 7.00 | 8.50 |
| P | - | 0.040 |
| S | - | 0.030 |
| N | 0.20 | 0.28 |
Note: Trace elements like Mo and Co may be present in special variants for enhanced properties, though not listed in the base composition.
Our high-temperature alloys, abrasion-resistant pipes, ceramic-lined systems and fittings provide exceptional durability in the most aggressive thermal, erosive and corrosive environments.
ZG35Cr24Ni7SiN is a high-performance heat-resistant cast alloy engineered for extreme thermal environments. It offers exceptional durability, oxidation resistance, and cost efficiency—making it the smart choice for demanding high-temperature applications.
Designed for continuous operation up to 1050°C, ZG35Cr24Ni7SiN maintains structural stability and mechanical strength even under prolonged thermal exposure.
High chromium and silicon content form a dense, protective oxide layer that significantly reduces metal loss and extends maintenance intervals.
Nitrogen alloying dramatically improves creep resistance and high-temperature strength, outperforming conventional Cr–Ni cast steels during long-term service.
Delivers performance comparable to high-Ni grades like ZG40Cr25Ni20 in many applications—at a significantly lower alloy cost.
Superior castability enables production of large, intricate one-piece components—reducing welds, joints, and potential failure points.
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