Product Category

　　 Product Highlights
　　1. Hard on the outside, tough on the inside—grows more wear‑resistant with use: Cast from solid ZGMn13 high‑manganese alloy steel, it delivers extended service life and excellent fracture resistance even under the severe impact conditions typical of mining operations.
　　2. Reinforced rib structure for enhanced bend resistance and deformation prevention: The back of the base plate features multiple through‑going reinforcing ribs, significantly increasing flexural rigidity, effectively dispersing concentrated stresses during excavation, and preventing deformation caused by prolonged heavy‑load operations.
　　3. High-precision machining, ready for immediate installation: The front end features a high-precision bucket‑tooth holder mounting groove and locating pin holes, while the rear end is provided with a flange surface or overlapping edge. All work is performed strictly in accordance with the customer’s drawings, ensuring precise alignment with the bucket body and eliminating the need for secondary machining.
　　 User Pain Points
　　In mining electric shovel operations, the bucket floor is subjected to static loads of tens to hundreds of tons of ore and severe sliding friction over long periods, while also enduring abrasion from sharp ore fragments and impact from heavy material drops. Standard‑material floors wear rapidly, causing increased bucket capacity and reduced sealing of the guard plate system; frequent replacements not only significantly raise spare‑part costs but also force prolonged shutdowns of the electric shovel, directly lowering the operational efficiency of the mine’s production line.
　　 Solution
　　Our company’s bucket bottom plates are cast from high-quality ZGMn13 high-manganese alloy steel, delivering “hard on the outside, tough on the inside, and increasingly wear-resistant with use.” The back of the plate features multiple through‑going reinforcing ribs that significantly enhance flexural rigidity and effectively distribute concentrated stresses during digging. The front end is equipped with precision‑machined tooth‑holder mounting slots and locating pin holes, while the rear end provides a flange surface or overlapping edge. Fabricated strictly according to customer drawings, these plates perfectly match the specifications of customers’ mating components.
　　 I. Product Description
　　This product is the core load-bearing component of a mining electric shovel bucket—the bucket bottom plate—cast from high-quality ZGMn13 high-manganese alloy steel. ZGMn13 high-manganese steel contains 0.9%–1.5% carbon and 10%–15% manganese; after water toughening at 1080°C, it develops an almost single austenitic microstructure, combining high strength with high toughness. Its surface can be hardened to HB 500–800 upon impact, enhancing the casting’s wear resistance and making it less prone to fracture under heavy impact loads.
　　The back of the base plate features multiple through‑going reinforcing ribs, which not only significantly increase bending stiffness but also effectively distribute concentrated stresses during excavation. The front end is equipped with high‑precision bucket tooth seat mounting slots and locating pin holes, while the rear end provides a flange surface or overlapping edge for connection to the bucket body’s rear wall. The overall structure strictly follows the customer‑provided drawings, ensuring perfect compatibility with the customer’s mating components.
　　 II. Product Specification Sheet
　　The bucket bottom plate is cast from high-manganese alloy steel ZGMn13 of superior quality; the chemical composition of the main material is as follows:

　　 III. Product Features and Advantages
　　1. Hard on the outside, tough on the inside—impact-resistant and unbreakable: The bucket bottom is cast entirely from ZGMn13 high-manganese alloy steel, enabling it to withstand substantial impact loads without fracturing and completely resolving the common issues of ordinary bottoms cracking easily and having a short service life.
　　2. Reinforced rib structure for bend resistance and deformation prevention: The back of the base plate features multiple through-going reinforcing ribs, significantly increasing flexural rigidity and effectively dispersing concentrated stresses during excavation. This prevents the base plate from bending or deforming under prolonged heavy-load operation, thereby maintaining the sealing integrity of the guard plate system and the overall operational efficiency of the machine.
　　3. High-precision machining, ready to install upon arrival: The front end features a high-precision bucket tooth seat mounting groove and locating pin holes, while the rear end is provided with a flange surface or overlapping edge. Manufactured strictly according to customer drawings for precise matching with the bucket body, eliminating the need for secondary machining—ready to install right out of the box.
　　 IV. Why Choose Us
　　• Specializing in wear-resistant castings for harsh operating conditions: We are not a foundry chasing short-term deals; instead, we are rooted in China, focusing on the R&D and manufacturing of wear-resistant castings for demanding environments such as mining and power generation. Take bucket liners as an example: specifically optimized for the heavy-load, high-impact conditions of electric shovels, ZGMn13 high-manganese steel undergoes water toughening, with the surface impact-hardened to HB500–800 while maintaining high toughness in the core. Combined with a through‑going reinforcing rib structure on the back, this design resists bending and deformation, significantly extending service intervals and reducing downtime risk at the source.
　　• We let the data speak, not empty promises of perfection: Casting processes are complex; we do not claim “zero defects,” but we do commit to “zero excuses.” Each batch of base plates undergoes a comprehensive inspection process, including precise dimensional measurements and magnetic particle testing, ensuring that the bucket‑tooth seat mounting slots, locating pin holes, and flange surfaces are all accurately dimensioned and free of errors. A complete test report is provided with every shipment.
　　• Long-term partnerships—delivery is just the beginning: Our digital systems enable you to track production progress in real time; we respond immediately to quality concerns, with no delays; and each shipment comes with a comprehensive test report for your quality‑assurance records. We believe that a supplier’s approach to resolving issues is what truly defines its value.
　　 V. Production and Quality Assurance
　　• Premium Raw Materials: Carefully selected high-quality, rust-free, oil-free scrap steel and punched billets ensure the purity of the bucket bottom plate material at the source, laying the foundation for impact-hardening performance.
　　• Ultimate density: Ceramic sand combined with a large-diameter riser casting process eliminates shrinkage porosity and cavities, ensuring a dense, uniform microstructure within the base plate and preventing cracking under heavy-load conditions.
　　• Precision melting: Melted in a Fuji electric furnace in Japan, with real-time compositional verification via spectrometer to precisely control carbon and manganese levels, ensuring the base plate’s work-hardening capability and impact toughness.
　　• Flawless Casting: 850°C package baking combined with bottom pouring eliminates sand hole defects, ensures a smooth, flawless working surface on the base plate, and prevents stress concentration and cracking.
　　• Strengthened metallography: 30-second rapid quenching makes it easier to obtain a single austenitic microstructure, achieving a “hard exterior, tough interior” bottom plate—surface hardened to HB500–800 while the core retains high toughness.
　　• Powerful shot blasting: cleans and hardens the surface, enhancing the wear resistance of the base plate and extending its service life.
　　• Rigorous quality inspection: Manual testing ensures that the mounting slots, locating pin holes, and flange surfaces of the bucket teeth base are precisely accurate, achieving a perfect fit with the bucket body.
　　• Transparent delivery: Scan a code to track progress in real time, with full visibility from material input to shipment.
　　 VI. Frequently Asked Questions (FAQ)
　　Q1: What is the minimum order quantity for bucket bottom plates?
　　Minimum order quantity is one piece. Bulk purchases qualify for discounted pricing.
　　Q2: What is the delivery time?
　　Custom-made bucket bottom plates are available within 60–75 days. Expedited production can be arranged for urgent orders upon negotiation.
　　Q3: What packaging options are supported?
　　Fixed with steel brackets and protected by stretch film, or packaged in wooden crates, to meet the sea‑ and land‑transport requirements for bucket baseplates.
　　Q4: Can the customer’s logo be printed on the packaging?
　　Yes. We support neutral packaging and cast lettering on the non-working surfaces of castings.
　　Q5: What is the recommended material for the bucket bottom plate?
　　We recommend using ZG120Mn13 high-manganese alloy steel, which is hard on the surface and tough inside, becoming increasingly wear-resistant with use. We can also provide alternative material options such as ZG120Mn13Cr2 and ZG120Mn13CrMo, tailored to customer requirements.