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  • 9Cr18Mo主图(1751337081140).jpg
  • 9Cr18Mo(1751337081107).jpg
  • 9Cr18Mo-黑色(1751337081300).jpg

9Cr18Mo


9Cr18Mo属于国标高碳高铬马氏体不锈钢,9Cr18Mo是制作轴承套圈及滚动体用的高碳铬不锈钢.9Cr18为高碳铬马氏体不锈轴承钢.淬火后具有高的硬度和耐磨性,较高的高温、低温尺寸稳定性.9Cr18Mo特性:


Production Process


Refining Furnace Production
Refining Furnace Production
Vacuum Degassing
Vacuum Degassing
Steel Ingot Pouring
Steel Ingot Pouring
Electric Slag
Electric Slag
Forging Processing
Forging Processing
Annealing Treatment
Annealing Treatment
Cutting and Processing
Cutting and Processing
Peeling Treatment
Peeling Treatment
Car Polishing Processing
Car Polishing Processing

Details


Product features

With the core advantages of "high hardness and wear resistance + stable corrosion resistance", 9Cr18Mo is an ideal material for high load scenarios in corrosive environments.

 

Smelting method

Mainstream process: electric arc furnace (EAF) primary smelting + LF ladle refining + VD vacuum degassing to ensure precise control of composition and reduction of gas content;

Upgrading process: some high-end batches are further purified by electroslag remelting (ESR) to reduce non-metallic inclusions and optimize the uniformity of structure.

 

Process characteristics

Heat treatment process

Process

Parameter

Target effect

Annealing

800~920℃ slow cooling

Hardness≤255 HB,easy to process

Quenching

1000~1050℃oil cooling

Hardness≥55 HRC(martensite matrix)

Temper

200~300℃oil cooling/air cooling

eliminate stress and stabilize hardness (58 ~ 60 HRC)

Cold treatment: heat preservation at -75 ℃ for 1 hour, retained austenite → martensite, hardness increased to 61.5 ~ 64 HRC.

 

Forging process

Temperature control: 1050 ~ 1080 ℃ for initial forging, 850 ~ 900 ℃ for final forging, and sand cooling to prevent cracking after forging; Key requirements: Multi-directional forging (forging ratio ≥ 3) to eliminate eutectic carbide segregation and avoid life reduction;

 

Purity

Impurity control:

Element

Limit

Effect

Sulfur (S)

≤0.030%

reduce cutting viscosity

Phosphorus(P)

≤0.035%

reduce brittleness

Oxygen(O)

≤20 ppm

VD process assurance(ESR level≤12 ppm)

Mixture

Type A/B/C≤gade 1.5

ASTM E45 standard

 

Micro-structure

Annealed state: spherical pearlite + uniform carbide (Cr, CrC, MoC); Quenched state: martensite + retained austenite + eutectic carbide; Tempered state: tempered martensite + dispersed carbide, grain size refinement (ASTM 8 ~ 10 grade);

 

Impact work

The mechanical properties show that: High hardness (≥ 55 HRC) at the expense of partial toughness, suitable for high wear resistance scenes; The data of elongation and reduction of area are missing, and the compressive strength is mainly used in practical application.

 

Ultrasonic flaw detection

Standard: unspecified, but commonly used in the industry SEP 1921/ASTM A388; Grade: high quality grade: defect ≤ Φ1 mm equivalent (for precision bearing/tool) ;

 

Ex-Factory status

Routine: annealed (hardness ≤ 255 HB) or quenched and tempered (≥ 55 HRC), with heat treatment type specified in the contract; Surface treatment: round turning, round black fur, fine grinding (Ra ≤ 0.8 μm)

 

Main features

High hardness and wear resistance: quenching hardness ≥ 55 HRC, carbide (Cr₇C₃、Mo₂C) improves wear resistance by 30% +;

Corrosion resistance: the Cr content is 17-19%, and the passivization film resists the corrosion of seawater, nitric acid and steam;

Dimensional stability: low deformation rate in high/low temperature environment, suitable for precision parts;

Disadvantages of the process: large grinding viscosity, fast temperature rise, need to control the cutting parameters;

 

Product application area

 It is suitable for manufacturing bearings in seawater, river water, nitric acid, steam and marine corrosive media, such as bearings in ship and submersible pump parts, bearings in petroleum and chemical machinery. 9Cr18Mo is suitable for tableware (knife) with good corrosion resistance (magnetic), turbine blades with higher hardness than 440a steel after quenching (magnetic), blades, nozzles, valves, board rulers, tableware (scissors), stainless steel slicing mechanical cutting tools and shearing tools, surgical blades, high wear-resistant equipment parts, etc.

 

Area

Special component

Performance adpater point

Corrosion Resistant Mould

High Load Plastic Mould (PVC/Engineering Plastics)

Corrosion Resistant Additive + High Wear Resistant

Precision bearing

Marine /chemical machinery bearing anti-seawater

anti-seawater/acid medium corrosion

Cutting tools

surgical blades, stainless steel cutting tools

high hardness + long-term sharpness

Industrial Parts Valves

Turbine Blades, Tableware (Knives/Scissors)

Corrosion Resistance + High Finish

 

Size specification

Type

Size range

Note

Round steel

Φ10~300 mm × 2~6 m

Smooth/black

Plate steel

Thin plate 0.2~4mm,thick plate 20~60mm

mirror surface/wire-drawing surface

Wire

Φ5.5~25 mm(round/straight)

special for cutter/bearing

 

Packing and shipping

Generally according to customer requirements to arrange the packaging and transportation, whether packaging and arrange the appropriate mode of transportation, vehicles, such as whether the direct loading of transportation, whether the band with packing steel, whether the packaging spray mark head, etc..

9Cr18Mo主图(1751337081140).jpg
9Cr18Mo(1751337081107).jpg
9Cr18Mo-黑色(1751337081300).jpg

FAQ


Q How should I choose the right die steel material for my die?

Ans: There are several key factors to consider when selecting a die steel, including: Mold use: injection molding? Die casting? Stamping? Cold work? Hot work? Processing material: plastic type (including glass fiber?) , metal type, yield requirements. Performance requirements: wear resistance, toughness, corrosion resistance, high temperature strength, polishing, dimensional stability. Budget: The price of different material grades varies greatly. Processing conditions: working temperature, stress, cooling mode. Suggestion: Provide as much detail as possible about the application of the die, or contact our technical sales team directly, and we will recommend the most suitable material grade according to your specific needs.

Q Is the die steel provided by you genuine? How to ensure the quality of materials?

Ans: Yes, the die steel we provide is produced and processed independently. We have long-term cooperation with first-line brands at national and abroad to ensure that all materials are genuine. We provide a complete original warranty (material certificate), including key data such as chemical composition and physical properties. We will also carry out strict factory re-inspection of some materials to ensure that the quality meets the standards.

Q The price of die steel fluctuates greatly. What are the main factors affecting the price?

Ans: The price of die steel is mainly affected by the following factors: Raw material cost: market price fluctuation of alloy elements (such as chromium, molybdenum, vanadium, tungsten, etc.). Production process: ESR, VD/VAR and other special processes increase the cost. Grade and brand of material: The price of material with high performance and famous brand is higher. Specifications and sizes: Premium prices may apply for special sizes, large sizes, or small quantities. Market supply and demand: changes in supply and demand in global and regional markets. Processing state: the price of pre-hard state (such as P20, 718, NAK80, etc.) Is higher than that of annealed state. We will provide a transparent and reasonable quotation according to the market situation.

Q What is time for delivery?

Ans: The delivery time depends on: Material inventory status: Common brands and specifications We usually have in stock, can achieve faster delivery (for example: 1-3 working days). Material specification and status: special size, uncommon brand or special treatment (such as pre-hardening, deep processing) may need to be ordered, the cycle is relatively long (for example: 1-6 weeks). Order size: Large orders may require coordinated production scheduling. Please tell us your specific requirements (brand, specification, status, quantity) at the time of inquiry, and we will provide the most accurate delivery information.

Q Can you provide heat treatment or processing services after the purchase of die steel?

Ans: Yes, we provide complementary professional services: Heat treatment: With professional heat treatment equipment (vacuum quenching, cryogenic treatment, tempering, etc.) And strict process control, we can provide customers with precise heat treatment services (according to material brand and hardness requirements). Finish machining: We can provide precision machining services such as milling, grinding (surface grinding, internal and external grinding), wire cutting, EDM, etc. According to customer's drawings. Please provide your specific needs (drawings, technical requirements), and we will evaluate and provide quotations and service programs.

Q The mold cracks and wears too fast during use. What are the possible reasons? Is it related to the material?

Ans: The causes of mold failure are complex and diverse, which may be related to materials, but also involve many links such as design, processing, heat treatment, service conditions, etc.: Material factors: improper selection of materials (performance does not match the working conditions), internal defects of materials (inclusions, segregation), counterfeit and shoddy materials. Heat treatment factors: Improper process leads to poor structure, uneven hardness and excessive residual stress. Design/processing factors: stress concentration, poor surface roughness, too deep tool marks. Usage factors: overload, insufficient lubrication, poor cooling, improper maintenance. Suggestion: In case of failure, please provide detailed information as much as possible (material grade, heat treatment status, photos of failure location, description of working condition). Our technical team can assist you in preliminary analysis to determine whether it is related to the material or provide suggestions for improvement.

Q Do you have a minimum order quantity (MOQ) requirement for your die steel products?

Ans: For the stock of conventional grades and specifications, we usually do not have strict MOQ restrictions, and can be purchased according to the actual needs of customers. For materials requiring special orders (such as unusual grades, special sizes, customized heat treatment/processing), Certain MOQ requirements may be set to ensure the economy of production, usually a minimum of 8 tons. Please consult our sales staff for specific MOQ before placing an order.

Q In addition to standard grades, can you offer special die steels with custom compositions?

Ans: We mainly deal in standard grades of die steel, which are widely proven to meet the needs of most applications. For the development of customized alloys with special performance requirements, this usually involves a large amount of R & D investment and production coordination, which is costly and takes a long time. We recommend that priority be given to the material closest to the demand from among the existing mature grades, or to meet special requirements by optimizing the heat treatment and surface treatment. If there is a need for customization, please specify the technical requirements and we will evaluate the feasibility.

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Qualifications


Certification of Contractual fidelity
Certification of Service Integrity Capital
Commercial Credit Certification of China Die Steel Industrial
Commercial Credit Certification of Awarded Enterprise
Commercial Credit Certification of Quality Guardianship
Commercial Credit Certification of Probity-treasured Bid

Production equipment


Gantry Milling Machine

Gantry Milling Machine

Lathe

Lathe

Sawing Machine

Sawing Machine

3000-Ton Stamping Presses

3000-Ton Stamping Presses

Annealing Furnace

Annealing Furnace

Laboratory Hydrogen Oxygen Nitrogen Gas Analyzer

Laboratory Hydrogen Oxygen Nitrogen Gas Analyzer

Forge Hammer

Forge Hammer

Vacuum Degassing Furnace

Vacuum Degassing Furnace

Steelmaking Workshop Production

Steelmaking Workshop Production

Steelmaking Production Operations

Steelmaking Production Operations

Production of Steel Ladles

Production of Steel Ladles

Producing Electric Arc Furnace

Producing Electric Arc Furnace

Steel Production

Steel Production

Refined Furnace Exterior Photo

Refined Furnace Exterior Photo

Refining Furnace Operating Room

Refining Furnace Operating Room

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