Select materials for high-temperature oxidation, thermal cycling, creep, acid, alkali or chloride corrosion, and combined corrosion and wear. Applications include clinker cooler grates, kiln hot-end parts, corrosion-resistant pump wet ends and nozzles. Specify the exact grade, beyond "stainless steel" or "heat-resistant steel".
For heat-resistant alloys, assess oxidation, carburization, sulfidation, creep, thermal fatigue and hot strength. For corrosion-resistant alloys, assess pH, chlorides, temperature, crevices, flow velocity and stress corrosion. Particle wear adds a need to balance corrosion resistance, hardness, toughness and manufacturability.
Continuous and peak temperatures, thermal cycling, atmosphere and mechanical loads determine the heat-resistant alloy system.
Material selection requires more than pH. Provide chloride content, temperature, solids, oxidizing or reducing conditions, and flow velocity.
Pressure-boundary and safety-critical parts must also meet the applicable product code, material standard and nondestructive testing requirements.
| Part / Environment | Main Failure Modes | Candidate Material Families | Required Checks |
|---|---|---|---|
| Cooler Grate Plates / Bars | Hot oxidation, thermal fatigue, clinker wear, creep and distortion. | Iron-chromium or chromium-nickel heat-resistant cast steels, graded for temperature and atmosphere. | Continuous and peak temperatures, thermal cycles, atmosphere, grate gaps, loads and the existing part's microstructure. |
| Kiln Hot-end Guards / Nozzles | Oxidation, sulfidation, carburization, thermal shock and erosion. | Heat-resistant stainless steel, heat-resistant cast steel or more highly alloyed materials. | Atmosphere composition, temperature gradients, cooling, stress and welded construction. |
| Corrosive Slurry Pump Impellers / Casings | Erosion-corrosion, pitting, crevice corrosion and loss of hydraulic profile. | Austenitic or duplex stainless steel, high-alloy or nickel-based castings, or elastomeric linings. | pH, Cl⁻, temperature, particles, concentration, flow velocity, pump type and pressure. |
| Shaft Sleeves, Valve Trim and Nozzles | Chemical corrosion, erosion, galling and localized wear. | Stainless or duplex steels, nickel- or cobalt-based alloys, or surface-engineered combinations. | Mating surfaces, medium, temperature, hardness difference, lubrication, pressure and machining tolerances. |
| High-temperature Screens / Conveyor Parts | Oxidation, creep, thermal fatigue, wear and weld cracking. | Heat-resistant plate, castings or alloy wire. | Operating temperature, load, apertures, supports, welding and cleaning method. |
Special alloys require careful control of chemistry balance, heat treatment, welding heat input and microstructure. Passing spectrometric composition checks does not establish corrosion or heat resistance.
Specify the exact grade and applicable ASTM, EN, GB, GOST or other drawing standard. Check heat chemistry, material identification and traceability.
For heat-resistant cast steel, assess microstructural stability and hot cracking. For duplex steel, assess phase balance and harmful intermetallic phases using appropriate tests where required.
Specify compatible filler metals, heat input, interpass temperature and post-weld treatment. Reinspect repair welds on corrosive-service parts to the same quality requirements.
Select hot tensile, creep, corrosion, intergranular or pitting corrosion, impact, hardness and NDT tests according to project risks.
Material Distinctions: High-chromium white iron primarily resists abrasion and differs from chromium-nickel heat-resistant cast steel. Standard 304/316 stainless steel is not suitable for every chloride solution, acidic slurry or high-temperature atmosphere.
Material References: ASTM Steel Casting Standards (A297/A743/A744/A890 and others); Wear- and Corrosion-resistant Materials for Metso Orion Slurry Pumps. Specify grades, temperature limits and medium compatibility from project data and material standards.
Provide the equipment model, part drawing number or drawing, continuous and peak temperatures, atmosphere or liquid composition, pH, Cl⁻, particle details, pressure, current material, failure photographs and quantity.
ANRANST provides customers worldwide with coordinated consulting, supplier sourcing, quality control and finished-part delivery for custom parts, wear parts and industrial spares from China, with scope to support other custom industrial parts.
Equipment and part identification, drawing review, material selection and manufacturing feasibility assessment.
Match requirements with suitable manufacturers in China and coordinate the exchange of technical information.
Drawing confirmation, material and process control, production tracking, inspection and acceptance coordination.
Coordinate manufacturing, quality confirmation, packaging and delivery of complete finished parts.
Provide the existing model, drawings, drawing or part numbers, materials or operating conditions so we can identify the appropriate technical review and supply route.
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