3Cr17Mo Stainless Steel
3Cr17Mo stainless steel is a martensitic stainless steel with excellent corrosion resistance, high hardness, good wear resistance, and strong polishing performance. It is widely used for corrosion-resistant molds, plastic mold steel, precision mechanical parts, blades, valves, and other components that require a combination of strength, surface finish, durability, and reliable performance in demanding working environments.
Product Description
Xiri Tool Steel is a leading supplier of 3Cr17Mo stainless steel in China. 3Cr17Mo is a martensitic stainless steel that enhances corrosion resistance and high-temperature strength by adding molybdenum. It is often used to make corrosion-resistant molds (especially PVC plastic molds) and mechanical parts that require high hardness and good mirror polishing performance.
Whether you need 3Cr17Mo flat bars, steel plates, or forged rounds, we provide custom dimensions with machining or grinding services. Our materials are strictly tested to ensure premium metallurgical structure.
3Cr17Mo is a martensitic stainless steel renowned for its exceptional corrosion resistance, coupled with favourable strength and hardness. Following quenching and low-temperature tempering, it achieves a hardness of 48 HRC. This pre-hardened and hardenable steel serves as a versatile corrosion-resistant plastic mould steel. Its excellent machinability renders it ideal for fabricating plastic moulds demanding corrosion resistance and high wear resistance.
Chemical Composition of 3Cr17Mo stainless steel
| C | Si | Mn | P | S | Cr | Mo |
| 0.28-0.35 | ≤0.80 | ≤1.00 | ≤0.030 | ≤0.030 | 16.00-18.00 | 0.75-1.25 |
Supply Form & Size Range of 3Cr17Mo stainless steel
We supply 3Cr17Mo stainless steel in various forms to meet your manufacturing needs:
Round bar: Diameter 10mm – 800mm
Steel Plate / Flat: Thickness 5mm – 800mm x Width 200mm – 1800mm
Surface: Black, Peeled, Rough machined or Grinded.
Delivery Condition: Annealed or QT.
Exceptional Performance: Unveiling 3Cr17Mo's Core Strengths
Outstanding Corrosion Resistance
Its 17% chromium content enables rapid formation of an extremely dense, self-repairing passivation layer on the surface, effectively resisting moisture, atmospheric exposure, and various weakly corrosive media. Compared to standard martensitic stainless steels, the addition of molybdenum (Mo) significantly enhances resistance to pitting and crevice corrosion. This ensures the material maintains its lustre and preserves product aesthetics and integrity even in demanding environments such as those containing moisture or chloride ions (e.g., sweat or seawater).
Exceptional Hardness and Wear Resistance
As a martensitic stainless steel, 3Cr17Mo achieves high hardness through heat treatment (quenching + tempering). Post-quenching hardness exceeds HRC 50, conferring outstanding resistance to abrasion and wear. Whether subjected to frequent sliding, contact, or impact, it effectively resists deformation and scratching, ensuring product precision and extended service life.
Excellent toughness and machinability
Many high-hardness materials suffer from brittleness, yet 3Cr17Mo overcomes this limitation. Its optimised chemical composition confers superior toughness compared to similar materials, reducing the risk of chipping or fracturing from accidental impacts during processing or use. Concurrently, it exhibits excellent machinability. Whether turned, milled, drilled, or ground, it yields a smooth machined surface, significantly enhancing production efficiency and yield rates.
Exceptional Polishing Performance
For products demanding the ultimate aesthetic finish, 3Cr17Mo is the ideal choice. Its uniform composition, when subjected to appropriate polishing techniques, yields a flawless surface with a mirror-like lustre and silky smoothness, substantially elevating the product’s visual appeal and added value.
Application Domains: The Pervasive Value of 3Cr17Mo
With its versatile performance, 3Cr17Mo has found extensive application across sectors demanding comprehensive strength, hardness, corrosion resistance, and aesthetic appeal:
Premium Cutting Tools and Blades: It stands as a premier material for crafting high-quality kitchen knives, surgical scalpels, scissors, razor blades, and similar products. Its exceptional hardness ensures enduring sharpness, while corrosion resistance meets stringent hygiene requirements for frequent cleaning.
Precision machinery and bearings: In mechanical components, bearings, valves, pump shafts and similar applications requiring load-bearing capacity and corrosion resistance, 3Cr17Mo guarantees stable equipment operation through its strength and corrosion resistance.
Moulding industry: Suitable for plastic moulds, die-casting moulds and similar applications, its excellent polishability and wear resistance ensure mould longevity and the surface quality of formed products.
Automotive Industry: Employed in manufacturing wear-resistant automotive components such as door locks, seatbelt fittings, and fuel injection system parts, meeting the stringent safety and durability standards of the automotive sector.
Sports Equipment and Hardware: From premium golf club heads and fishing tackle accessories to high-end watch cases, spectacle frames, and cutlery, 3Cr17Mo is favoured by consumers for its robust durability and aesthetically pleasing properties.
Quality Forges Trust: Our Approach to Refining Every Piece of 3Cr17Mo
We understand that material excellence ultimately hinges on meticulous attention to every production stage. We pledge that every sheet or bar of 3Cr17Mo steel delivered to you embodies our unwavering commitment to quality:
Source Control: Selecting Premium Raw Materials
We rigorously vet raw materials, ensuring purity and compositional stability from the outset. All inputs undergo stringent spectral analysis to prevent non-conforming materials from entering production.
Precision Smelting, Forging Microstructure
Employing advanced AOD (Argon Oxygen Decarburisation) or VOD (Vacuum Oxygen Decarburisation) ladle refining technologies, we achieve precise control over critical elements such as carbon, chromium, and molybdenum. This effectively reduces gas and inclusion content, ensuring molten steel purity and establishing a robust microstructural foundation for the material’s outstanding corrosion resistance and mechanical properties.
Intelligent Forging and Rolling for Optimised Microstructure
During forging/rolling, we meticulously regulate temperature, deformation, and rolling speed at each pass. This not only guarantees dimensional accuracy but also refines the material’s grain structure, thereby enhancing strength, toughness, and uniformity.
Comprehensive Quality Control with Data Traceability
From billet to finished product, we implement over ten quality inspection stages. These include, but are not limited to: ultrasonic flaw detection (for internal defects), spectral analysis (for composition verification), mechanical property testing (measuring hardness, strength, elongation), metallographic analysis (for microstructure observation), and salt spray testing (for corrosion resistance validation). Each batch possesses a unique ‘identity record’, ensuring complete traceability throughout the production cycle.
Professional Heat Treatment, Unlocking Potential
We offer complementary professional heat treatment services or provide comprehensive heat treatment process guidance. Through precise quenching and tempering control, we fully unlock the performance potential of 3Cr17Mo material, achieving the optimal combination of hardness and toughness tailored to your requirements.
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Why Manufacturers Choose Huangshi Xiri
Huangshi Xiri combines international-standard steel grades, a complete tool steel portfolio, strict quality control and reliable global supply. We match DIN / JIS / AISI equivalents precisely, offer cutting and heat-treatment services, and control every step from smelting to inspection. With stable capacity, on-time delivery and responsive technical support, we help manufacturers reduce risk, save costs and run production with confidence.
Contact Us
Contact Huangshi Xiri today for quotations, grade selection and technical support on tool steel, mold steel and alloy steel. Whether you need samples, cutting-to-size service or long-term supply for your projects, our engineers and sales team are ready to respond quickly with professional advice and reliable solutions for your manufacturing needs.
