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A Complete Analysis of 9Mn2V Product Details

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  • 9Mn2V

1. Product Details Overview

9Mn2V is a classic oil-hardening cold work die steel, classified as an alloy tool steel. With its balanced mechanical properties and cost-effectiveness, it is widely used in the manufacturing of small and medium-sized cold work dies. This product is produced through electric arc furnace smelting and hot/cold rolling processes using high-quality raw materials. Its precise chemical composition and strict impurity control ensure a uniform and dense internal structure. Key features include: excellent hardenability and hardenability, achieving HRC60-62 hardness after appropriate heat treatment, with oil-quenching alone yielding a uniform martensitic structure without complex cooling processes; high hardness combined with good wear resistance, effectively resisting frictional wear during cold working and extending die service life; while also maintaining toughness and machinability, with moderate annealed hardness enabling easy turning, milling, and other mechanical processing, meeting the rapid manufacturing needs of small and medium-sized dies. Whether for precision punching, cold bending, or manufacturing gauges and wear-resistant components, 9Mn2V delivers stable performance and affordable pricing, providing reliable cost-saving solutions for industrial production. It stands as an exceptionally cost-effective cold work die steel material in manufacturing.


2. Product Model Details

The 9Mn2V products showcased here come in various specifications to meet diverse processing and application needs. The specific models and technical parameters are as follows:

1. Basic Model Classification

- Plate specifications: 9Mn2V-δ (thickness) × W (width) × L (length), with thickness ranging from 0.1mm to 800mm, width options from 10mm to 1500mm, and standard length of 2000mm (customizable). Available in cold-rolled (2-5mm) and hot-rolled (6-8mm) variants, featuring surface treatments including annealing, pickling, and sandblasting to meet diverse processing requirements.

- Round steel specifications: 9Mn2V-Φ (diameter) × L (length), with diameters ranging from 5mm to 400mm and standard lengths of 6000mm, available for custom cutting per customer requirements. Square steel is also available in sizes from 50mm×50mm to 600mm×600mm, with precision grades including standard (±0.5mm) and precision (±0.1mm) to meet diverse machining needs.

- Module/Block Material Model: 9Mn2V (length×width×height), standard dimensions 210mm×500-810mm, with custom shape available. Forged or hot-rolled for enhanced grain refinement and superior mechanical properties, ideal for small-to-medium mold assembly and component manufacturing.

- Coil/strip specifications: 9Mn2V steel with thickness (0.03-16.0mm) and width (1200mm), available for custom cutting. Surface finishes include annealed or pickled, designed for coil processing in batch stamping production.


2. Explanation of Core Parameters

- Compliance standard: GB/T 1299-2014 (National Standard), equivalent to ISO 4957 90MnV2, ensuring product quality meets industry specifications. Material certificates and test reports are available upon request.

- Chemical composition (mass percentage,%): C 0.85-0.95, Si ≤0.50, Mn 1.70-2.00, P ≤0.030, S ≤0.030, Cr ≤0.25, V 0.10-0.25. The precise composition ratio ensures excellent hardenability and wear resistance, which are critical to its core performance.

- Heat treatment parameters: Anneal at 750-780°C for 2-4 hours with furnace cooling, achieving hardness of 235-268 HBW. Quench at 830-860°C with oil cooling, yielding hardness of HRC 62-64. Temper at 150-200°C for 2-3 hours with air cooling to room temperature, stabilizing hardness at HRC 60-62. The heat treatment process can be customized according to actual application requirements.


3. Product Details

1. Appearance details

The 9Mn2V product features a clean and defect-free appearance: The sheet surface is smooth and free from cracks, inclusions, or pores, with sharp edges and precise cutting surfaces. Its dimensional accuracy is strictly controlled, with deviations within industry standards. The round steel exhibits uniform coloration, no oxide scale buildup, consistent diameter, and no visible bending or deformation. The modules/blocks show even forging marks, with a rough surface for subsequent precision grinding. The coils/strip materials display flat surfaces, uniform thickness, and no wrinkles or damage, showcasing an excellent overall texture that reflects high-quality manufacturing processes.


2. Internal organization details

Metallographic analysis reveals that the annealed 9Mn2V steel exhibits a spheroidal pearlite structure with uniformly fine grains, achieving an average grain size of over 8 microns, which facilitates mechanical processing. After quenching and tempering, the microstructure transforms into fine needle-like martensite with dispersed carbides, where uniform carbide precipitation occurs without significant agglomeration, significantly enhancing the steel's hardness and wear resistance. Through precision smelting and forming processes, internal impurities are thoroughly removed, resulting in minimal defects such as shrinkage cavities and porosity. The density reaches over 99.5%, ensuring long-term cold working performance without fracture failure due to internal defects and guaranteeing stable mold operation.


3. Performance Details

- Hardness: The annealed state hardness ranges from 235 to 268 HBW, facilitating mechanical processing. After quenching and tempering, the hardness can reach HRC 60-62 with uniform distribution and deviation within ±1 HRC. This effectively resists friction and wear between the mold and workpiece, thereby extending the mold's service life.

- Mechanical properties: tensile strength 1150-1340MPa, yield strength ≥920MPa, elongation δ5≥8%, demonstrating excellent strength-plasticity balance. This material resists brittle fracture during cold working, making it ideal for small-to-medium-sized die applications.

- Wear resistance: Test results show its wear rate is only 1/4-1/2 of ordinary carbon steel. In high-frequency friction scenarios like punching and cold bending, it maintains mold surface precision, reduces maintenance and replacement frequency, and lowers production losses.

- Hardening capability: The core maintains hardness above HRC55 after quenching at a 50mm cross-section. Oil cooling alone suffices for quenching, eliminating the need for additional cooling equipment. This simplifies heat treatment processes, reduces production costs, and meets the heat treatment requirements for small and medium-sized molds.


IV. Product Advantages

1. Material Advantages: Premium Raw Materials + Precision Manufacturing

Using high-purity raw materials and combining electric arc furnace smelting with hot/cold rolling forming processes, we strictly control chemical composition and impurity content to ensure stable and reliable steel quality. Compared to similar cold work die steels, 9Mn2V exhibits superior microstructure uniformity and density, effectively eliminating die failure risks caused by material defects at the source, thereby providing a solid foundation for subsequent processing and application.


2. Performance advantages: Oil hardening characteristics + balanced compatibility

With excellent oil hardness, this material features a simple quenching cooling process that requires no complex equipment, resulting in low heat treatment costs. It achieves a balanced combination of high hardness and sufficient toughness, effectively resisting friction wear during cold working while preventing mold brittleness. This makes it ideal for complex applications in small and medium-sized molds. Compared to high-carbon, high-chromium mold steels, it offers superior machinability, significantly improving mold manufacturing efficiency.


3. Specifications Advantages: Multi-form + Full-range Coverage

Available in diverse forms including panels, round steel, modules, and coils/strip materials, we provide a wide range of standard specifications across all formats. Thickness options span from 0.03mm to 800mm, with diameters ranging from 5mm to 400mm. Our solutions support customized shapes and special surface treatments, eliminating the need for additional secondary processing. These designs seamlessly integrate with various mold requirements, significantly reducing production time and costs.


4. Cost advantage: High cost-performance ratio + Significant cost reduction

As a cost-effective cold work die steel, 9Mn2V offers a competitive pricing, reducing procurement costs by 30%-50% compared to high-end die steels like Cr12MoV. Its simplified heat treatment process and high machining efficiency, coupled with low frequency of die maintenance and replacement, effectively lower the total lifecycle costs of die manufacturing and usage, thereby enhancing production efficiency for customers.


5. Quality Advantage: Rigorous Testing + Quality Assurance

Each batch of products undergoes rigorous quality testing, including chemical composition analysis, metallographic structure examination, hardness measurement, tensile performance evaluation, and non-destructive testing (NDT), to ensure all parameters comply with national standards and customer requirements. Comprehensive test reports and material certifications are provided, with support for retesting by third-party inspection agencies, thereby enhancing quality assurance and ensuring customer confidence in product usage.


5. Product Application Scope

With its outstanding comprehensive performance and high cost-effectiveness, 9Mn2V is widely used in the manufacturing of small and medium-sized cold working dies, wear-resistant components, and measuring tools. The specific applications are as follows:

1. The Field of Stamping and Punching Dies

This equipment is designed for manufacturing various small and medium-sized cold stamping and punching dies, including blanking dies, punching dies, cutting dies, and notch dies. It can process metal materials with sheet thickness ranging from 0.1mm to 5mm (such as steel plates, aluminum plates, and galvanized sheets). Widely used in the stamping production of electronic components, hardware accessories, home appliance parts, and automotive components, it ensures dimensional accuracy and surface quality of stamped parts while enhancing production efficiency.


2. Cold Bending and Molding Die Field

The system can manufacture cold forming dies, bending dies, and edge rolling dies, designed for cold forming of metal profiles and sheets. It is suitable for production scenarios such as cold bending of angle steel, sheet bending, and pipe edge rolling. With high hardness and wear resistance, it effectively resists friction and compression during forming processes, preventing die wear and deformation. This ensures the aesthetic appearance and dimensional stability of formed parts, meeting the demands of mass production.


3. The Field of Measuring Instruments and Cutting Tools

It is used to manufacture various high-precision measuring tools, such as calipers, micrometers, gauges, and templates. With its stable hardness and dimensional stability, it ensures long-term precision maintenance and extends tool service life. Additionally, it can produce small and medium-sized cutting tools, including shearing blades, craft knife blades, small punches, and dies, meeting daily machining and production requirements.


4. Field of Wear-Resistant Mechanical Components

It is suitable for manufacturing small and medium-sized mechanical parts with high hardness and wear resistance requirements, such as valve cores, gears, cams, guide columns, and guide sleeves. It is widely used in industries like machine tools, hydraulic equipment, and automotive manufacturing. Its excellent wear resistance reduces part wear, enhances equipment operational stability, and extends the service life of the equipment.


5. Other fields

In addition to the aforementioned applications, 9Mn2V can also be utilized in manufacturing cold extrusion dies (for small and medium-sized applications), drawing dies, and impression dies, suitable for cold extrusion and surface impression of materials such as copper and aluminum. Furthermore, it can serve as coil or strip material for continuous production of stamped parts in bulk, meeting the large-scale production demands of industries like electronics and hardware.


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