Engineered for excellence in extreme wear environments.
JUNLONG Machinery Co., Ltd., established in 2014 in Weifang, Shandong, represents the pinnacle of Chinese metallurgical expertise. Spanning 60,000 square meters with an annual output of 20,000 tons, we are not just a high chromium steel castings manufacturer; we are a strategic partner for global industry leaders. Our team of 200+ specialists, including 30+ senior engineers, ensures every casting meets the rigorous demands of ISO 9001 and TS 16949 standards.
Specializing in high-chromium cast irons (ASTM A532), carbon steel, and alloy steel. Our high-Cr castings leverage a precise eutectic carbide structure to deliver unmatched hardness (HRC 58-65).
In the world of abrasive wear, high chromium steel (and specifically high chromium cast iron) is the gold standard. As a leading manufacturer, we understand that the "Information Gain" for our clients lies in understanding how Chromium-to-Carbon ratios affect the lifecycle of machinery.
High chromium steel castings typically contain 12% to 28% chromium. This high chromium content, when combined with carbon, forms M7C3 primary carbides. These carbides are significantly harder than the iron matrix, providing a "shield" against abrasive particles in mining, milling, and dredging applications.
| Grade Type | Cr Content % | Hardness (HRC) | Primary Application |
|---|---|---|---|
| Low Chromium | 1% - 3% | 45 - 50 | Grinding balls, general wear |
| Medium Chromium | 8% - 11% | 50 - 55 | Impact hammers, brick molds |
| High Chromium (Our Specialty) | 12% - 28% | 58 - 67 | Slurry pump parts, Vertical Mill liners |
China's casting industry has undergone a technological revolution. No longer focused solely on cost, factories like JUNLONG integrate AI-driven mold design and automated lost-wax casting lines to compete on quality with European foundries while maintaining the logistics advantages of the Shandong manufacturing cluster.
Scaling precision casting to meet the world's most demanding sectors.
Excavator bucket teeth, track pads, and crane components. Our castings endure extreme shock loads and abrasive soils.
Crucial for slurry pumps and crusher liners. High Cr content ensures parts last 3-5x longer than standard steel.
Precision-cast railway coupling and brake systems. TS 16949 certified quality control ensures safety and reliability.
Valves, pumps, and cable protectors designed for high-pressure, corrosive subsea or desert environments.
Corrosion-resistant stainless steel and alloy castings that meet international maritime classification standards.
We solve the "Trust Gap" by providing full material traceability, digital inspection reports, and DDP shipping options.
The industry is shifting toward "Smart Casting." As a forward-thinking manufacturer, we are adopting several key trends that provide our clients with significant Information Gain:
Internationally advanced production lines that reduce human error and ensure consistency across large batch orders.
On-site spectrometer testing for chemical composition and physical testing for tensile strength and impact toughness.
Equipped with CNC lathes, milling machines, and grinders to deliver components with tight tolerances (±0.1mm).
A: We routinely produce high-Cr castings with up to 28% Chromium (ASTM A532 Class III Type A). For specialized applications, we can customize alloys to include Molybdenum and Nickel for enhanced corrosion resistance.
A: Every batch undergoes a full inspection protocol: Chemical Analysis (Spectrometer), Hardness Testing (Brinell/Rockwell), Dimensional Inspection (CMM), and Ultrasonic Testing (UT) if required. All reports are provided in English prior to shipping.
A: For new designs, mold manufacturing takes 15-20 days. Production and machining typically require 30-45 days depending on the complexity and volume of the order.
A: Yes, our engineering team uses 3D scanning and CAD/CAM software to replicate or improve upon existing parts. We often suggest design modifications to improve the "castability" and wear life of the component.
Get a technical consultation and quote from China's leading high chromium steel castings manufacturer today.
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