Qingyun Hongsheng Machinery Parts Co., Ltd. is one of the most reliable manufacturers and suppliers of heat-treated high hardness bimetal wear-resistant pipe in China. We warmly welcome you to wholesale high quality heat-treated high hardness bimetal wear-resistant pipe at low price from our factory. If you have any enquiry about quotation, please feel free to email us.
Introduction to Materials
1. High-Chromium Cast Iron / Carbon Steel (Cr > 12%)
This is the most widely used and cost-effective bimetal wear-resistant material combination.
- Typical Grades: KmTBCr15 / AISI 1010, KmTBCr20 / AISI 1020, KmTBCr26 / AISI 1020. The outer base pipe is ordinary carbon steel (e.g., 1010, 1020), and the inner liner is high-chromium white cast iron (chromium content 15%-28%). The national standard is GB/T 34008-2017, also corresponding to Class III Type A in the American ASTM A532 standard.
- Suitable Applications: Suitable for severe abrasive wear under medium to high impact conditions. Typical applications include:
Mining Industry: Slurry transportation pipelines (especially tailings and concentrates from iron, copper, and gold mines), cyclones.
Power Industry: Pulverized coal transportation pipelines, ash and slag removal pipelines.
Metallurgical Industry: Sinter, pellet transportation pipelines.
Cement Industry: Raw meal, clinker, cement powder grinding and transportation pipelines.
- Suitable Applications: Suitable for severe abrasive wear under medium to high impact conditions. Typical applications include:
- Service Life: In typical slurry transportation (e.g., iron ore tailings, concentration 40-60%, particle size <2mm), its lifespan is typically 5 to 15 times that of ordinary carbon steel pipes (e.g., Q235). For instance, under specific conditions where ordinary steel pipes need replacement within months, such composite pipes can last 2 to 5 years or even longer. Lifespan is highly influenced by material hardness, flow velocity, and impact angle.
2. High-Chromium Cast Iron / Low-Alloy Steel (Cr > 12%, Reinforced Base Pipe)
This is a performance-enhanced version based on the standard type.
- Typical Grades: KmTBCr26 / Q345B (16Mn). The inner liner material is similar to the first type (e.g., Cr26), but the outer base pipe uses high-strength low-alloy steel (e.g., Q345/16Mn, corresponding to European S355).
- Suitable Applications: Suitable for complex conditions involving high wear along with high pressure, mechanical loads, or certain vibrations. The reinforced base pipe provides higher overall structural strength and pressure-bearing capacity.
High-pressure slurry pump discharge pipelines, long-distance main transportation pipelines.
Dynamic pipeline systems that need to withstand external mechanical forces or installation stress.
Applications requiring high overall pipe rigidity and deformation resistance. - Service Life: The wear life of its abrasion-resistant liner is comparable to the first type. However, due to its base pipe's better fatigue and deformation resistance, the overall safe service cycle is longer, effectively preventing early failure caused by base pipe rupture. The advantage is more pronounced under high-pressure pulsating conditions.
3. Nickel-Hard Cast Iron / Carbon Steel (Ni-Cr-Hard)
This is another classic class of abrasion-resistant white cast iron, with nickel as the primary alloying element.
- Typical Grades: KmTBNi4Cr2 / AISI 1010. Corresponds to international standards ASTM A532 Class I Type A (Ni-Hard 1) or Type B (Ni-Hard 2).
- Suitable Applications: Suitable for conditions with medium to low impact, dominated by sliding wear and cutting wear. Its hardness is high (HRC 55-62), but its brittleness is slightly greater than that of high-chromium cast iron.
Slurry pump flow components, sand pump sleeves.
Pipelines transporting fine particles (e.g., fly ash, quartz sand).
Wear-resistant applications sensitive to material cost and without extreme impact forces. - Service Life: Excellent performance in pure abrasive wear conditions against hard abrasives like sharp quartz sand. However, its crack resistance is inferior to high-chromium cast iron under conditions with strong impact or thermal shock. Lifespan is typically 3 to 8 times that of ordinary steel pipes, depending on the impact intensity.
4. Stainless Steel / Carbon Steel (Stainless Clad)
This type of pipe addresses the dual needs of wear resistance and corrosion resistance.
- Typical Grades: 304L / AISI 1020, 316L / AISI 1020. The outer layer is carbon steel providing strength, and the inner layer is austenitic stainless steel providing corrosion resistance.
- Suitable Applications: Suitable for corrosive wear or high-temperature oxidative wear conditions.
Chemical Industry: Slurry pipelines transporting media containing corrosive substances like acids, alkalis, salts.
Marine Engineering: Seawater transportation, dredging pipelines.
High-Temperature Flue Gas: Slurry pipelines in power plant flue gas desulfurization (FGD) systems with certain corrosiveness.
Wear-resistant transportation in industries like food and pharmaceuticals requiring cleanliness. - Service Life: Its lifespan primarily depends on the synergistic effect of corrosion and wear. In pure wear conditions, its abrasion resistance may not match that of high-chromium cast iron. However, under corrosive wear conditions, its lifespan far exceeds that of ordinary wear-resistant steel and standard stainless steel, effectively preventing rapid failure caused by pitting or uniform corrosion. Lifespan assessment requires considering both corrosion rate and wear rate.
5. Special Alloy / Carbon Steel (e.g., High-Molybdenum, High-Boron Alloys)
Custom-developed materials for extreme or special conditions.
- Typical Grades: No universal grade, mostly customized by manufacturers. For example, adding elements like Molybdenum (Mo), Vanadium (V), Boron (B) to a Cr26 base to create ultra-high hardness or alloys with specific phase structures.
- Suitable Applications: Suitable for harsh conditions such as extreme wear, high temperature, or strong impact.
Pipelines transporting slurries of high-hardness ores (e.g., alumina, silicon carbide).
Pneumatic conveying pipelines for high-temperature solid particles (>400°C).
Wear protection sleeves for severely worn and eroded boiler "four tubes" (water walls, superheaters, etc.). - Service Life: Under specific extreme conditions, its lifespan can be increased by 30% to 100% compared to conventional high-chromium cast iron materials. However, due to high costs, it is typically used only in critical, vulnerable areas. Its cost-effectiveness lies in reducing downtime and replacement frequency.
Product Pictures
Company Profile
dshow machinery co.,ltd
Strategically located in the Bohai Economic Development Zone of Dezhou, Shandong, Qingyun Hongsheng Machinery Parts Co., Ltd. benefits from exceptional logistics. Situated just 5 km from the Bin-De Expressway and approximately 80 km from Tianjin Port, we ensure efficient and reliable supply chain connectivity for our global partners.
We are an integrated manufacturer combining R&D, precision processing, production, and international trade. As a specialized large-scale producer, we focus on high-performance solutions for extreme industrial environments, including:
- Wear-resistant ceramics and composite linings
- Heat-resistant and stainless steel castings
- Composite corrosion-resistant alloy steels
Our components are engineered for durability in demanding sectors such as mining, cement, power generation, and metallurgy. Committed to quality and innovation, we deliver reliable products that help clients worldwide reduce downtime, lower maintenance costs, and extend equipment service life. We are your trusted partner for critical industrial material solutions.
Frequently Asked Questions
How do I select the most suitable material and grade for my specific operating conditions?
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This depends on several key parameters: the type of abrasives, hardness, particle size, slurry concentration, flow velocity, pH level, temperature, and impact angle. We offer free operational consultation and selection services. Please provide the above parameters, and our engineers will recommend the most cost-effective solution for you.
Do you offer custom sizes? What is your standard size range?
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Yes, customization is one of our core services. We can produce pipes with diameters ranging from Φ10mm to over Φ1000mm and lengths tailored to your needs. Whether it's straight pipes, elbows, tees, reducers, or special-shaped parts, we can provide them.
What is the minimum order quantity (MOQ)?
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To support trial orders and small projects, our MOQ is flexible. For standard specifications, it can be as low as 1-2 tons. For custom parts, minimum requirements in meters or weight depend on complexity. Please contact us with your specific needs.
What is the typical lead time?
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For conventional materials and specifications, the standard lead time is 25-35 days after the contract takes effect. Complex custom parts or large-volume orders may require additional time. We will provide an accurate production schedule before confirming your order.
How is the price calculated? What are the main influencing factors?
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The price is usually calculated per meter or per ton and is mainly influenced by the following factors:
- Liner material grade (e.g., Cr15, Cr26, stainless steel);
- Pipe dimensions (diameter, wall thickness, length);
- Base pipe material;
- Complexity of customization (e.g., elbows);
- Order quantity.
We will provide a detailed quotation based on your inquiry.
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