High Chrome Wear Resistant Casting Components
Astm a532 high chromium castings deliver outstanding wear resistance and hardness, ideal for mining, cement, power, and material handling industries.
High Chrome Wear Resistant Casting Components
Astm a532 high chromium castings deliver outstanding wear resistance and hardness, ideal for mining, cement, power, and material handling industries.
| Standard | Cr | Mo | Ni | C | Mn | Si | Cu | P | S |
|---|---|---|---|---|---|---|---|---|---|
| ASTM A532 | 23 – 30% | 3% | 2.50% | 2 – 3.3% | 2% | 1.50% | 1.20% | 0.10% | 0.06% |
Engineered for high-abrasion environments, Ni-Hard wearback pipes provide robust performance and cost-effective durability in conveying abrasive materials.
Ni-Hard cast irons, with nickel and chromium, are highly abrasion-resistant, especially in sliding contact applications.
The inner wearback plate is replaceable, reducing downtime and allowing targeted maintenance of high-wear zones.
Heavy-duty Ni-Hard castings maximize pipe longevity, even under continuous abrasive loading.
Available in 45° and 90° bends, with or without wearbacks, suitable for custom flow system layouts.
Standard flanged ends allow quick and secure installation into existing pipelines and equipment.
Custom fabrication supports specific dimensions, angles, and wearback options to match system requirements.
Ideal for conveying abrasive media such as cement, slag, coal, granite dust, quarry fines, and sinter dust.
Lower lifecycle costs due to reduced part replacement frequency and minimal downtime from targeted wearback renewal.
Ni-hard is a type of cast iron that is made from nickel and chromium alloys. It is used in a variety of applications, such as in the construction of pipes, cables, and other structures. Ni-hard is also used in the manufacturing of machinery, such as drills and lathes.
One such material is Ni-Hard. Ni-Hard is a generic name for a family of white cast irons, alloyed with nickel and chromium, suitable for low impact, sliding abrasion for both wet and dry applications.
There are three types of Ni-Hard: Type 1, Type 2 and Type 4. Each has slight variations in composition between ASTM and EN specifications, shown in the table below Nickel is vital in optimising hardness and thus wear resistance. Nickel content increases with section size or cooling time of the casting to inhibit pearlitic transformation. For castings of 38–50 mm (1½–2”) thick, 3.4% to 4.2% nickel is sufficient to suppress pearlite formation which forms as the casting mold cools. Heavier sections may require nickel levels up to 5.5% to avoid the formation of pearlite. It is important to limit nickel content to the level needed to control pearlite as excess nickel increases the amount of retained austenite and lowers hardness.
| Pipe Grade | Designation | C | Ni | Cr | Si | Mn | Mo | S | P |
|---|---|---|---|---|---|---|---|---|---|
| ASTM A532 | |||||||||
| Ni-Hard 1 | Class I, Type A | 2.8–3.6 | 3.3–5.0 | 1.4–4.0 | 0.8 | 2.0 | 1.0 | 0.15 | 0.3 |
| Ni-Hard 2 | Class I, Type B | 2.4–3.0 | 3.3–5.0 | 1.4–4.0 | 0.8 | 2.0 | 1.0 | 0.15 | 0.3 |
| Ni-Hard 4 | Class I, Type D | 2.5–3.6 | 4.5–7.0 | 7.0–11.0 | 2.0 | 2.0 | 1.5 | 0.15 | 0.10 |
| EN 12513 | |||||||||
| Ni-Hard 1 | EN-JN2039 | 3.0–3.5 | 3.0–5.5 | 1.5–3.0 | 0.8 | 0.8 | – | 0.10 | 0.10 |
| Ni-Hard 2 | EN-JN2029 | 2.5–3.0 | 3.0–5.5 | 1.5–3.0 | 0.8 | 0.8 | – | 0.10 | 0.10 |
| Ni-Hard 4 | EN-JN2049 | 2.5–3.5 | 4.5–6.5 | 8.0–10.0 | 1.5–2.5 | 0.3–0.8 | – | 0.08 | 0.08 |
Engineered to thrive in highly abrasive environments, Ni-Hard pipes offer unmatched longevity and performance across material handling industries.
Ni-Hard alloys resist severe abrasion from sand, cement, quarry dust, and other harsh media—far outperforming standard steel pipes.
With significantly longer service life in abrasive environments, Ni-Hard pipes reduce replacement frequency and system downtime.
Their inherent durability minimizes maintenance needs and repair intervals, improving uptime and operational efficiency.
Despite higher upfront costs, their longevity and low upkeep requirements yield substantial long-term cost savings.
Smooth internal surfaces reduce friction and turbulence, enhancing transport efficiency and material throughput.
Ideal for mining, cement, power generation, and other sectors involving abrasive media handling.
Allows targeted component replacement instead of full pipe replacement—minimizing downtime and optimizing cost control.
Ni-hard wearback pipes are carefully coated and packaged to ensure corrosion protection, aesthetic finish, and secure transit handling.
The outer surface is painted with anti-rust or customized coatings, while inner surfaces are sealed or fixed. Packaging methods include wooden boxing, steel framing, and internal blocking to protect pipes from vibration, moisture, and mechanical damage during transportation.
Steel frame packaging to secure the pipe body.
Surface painted to prevent oxidation and corrosion.
Smooth painted finish before shipping.
Internal block to prevent pipe movement.
Uniform coating for warehouse or export.
Plastic plugs to block moisture entry.
Export-grade wooden box with anti-shock padding.
Ni-Hard and Chrome White Iron are both commonly used materials in applications requiring high wear resistance, but they have several key differences:
| Ni-Hard | High Chrome White Iron |
|---|---|
| Specification: ASTM A532 Class I | Specification: ASTM A532 Class II and III |
| Microstructure: Cementitic iron that solidifies as austenite with Fe₃C carbides | Microstructure: Iron-rich martensitic matrix with M7C3 chromium carbides |
| Type A: most affordable and common, ideal for abrasion resistance only | Class II alloys offer superior impact resistance compared to Ni-Hard A, B, D |
| Type B: replaces Type A for more toughness | Class II/III: better corrosion and toughness than Ni-Hard B |
| Type D: highest toughness and corrosion resistance among Ni-Hard grades | Class III: highest chromium content; best corrosion resistance among A532 alloys |
Applications:
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Applications:
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Ni-Hard (ASTM A532 Class I Type A) and High Chrome White Iron (ASTM A532 Class II & III) differ in microstructure, mechanical properties, and cost-effectiveness depending on application demands. This comparison helps in selecting the right material for specific wear and corrosion challenges.
Ni-Hard wearback pipes are engineered for high-abrasion environments, offering long service life in industries like mining, power generation, and construction.
Handles sand, cement, ores, and coal dust in mining, cement, and bulk material systems.
Performs in extreme heat environments such as coal fly ash handling in thermal plants.
Nickel promotes austenitic microstructure—resistant to both abrasion and heat.
Used in mining, construction, and power generation industries for reliable wear solutions.
Available from 25 kg to 500 kg per piece to meet various system requirements.
Produced per IS: 4771 – 1985 Type 1A to Type 3, ensuring quality and consistency.
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