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3Cr2W8V(1.2581)


part of the production adopts the process of "rolling instead of forging" to replace the traditional forging, and optimize the cost and yield; (the blooming temperature is 1140 ~ 1200 ℃, and the hot shearing temperature is ≥ 950 ℃)


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 Introduction

China Model:3Cr2W8V,

Germany -1.2381,

Japan-SKD5,

USA-H21,

 

Product Parameter

Steel grade(GB) Comparison of Steel Grades by Country

 Technical Conditions

Chemical Constituents

C

Cr

Mo

V

S

P

Si

Mn

Ni

W

Al

Cu

Nb

Co

B

3Cr2W8V

Germany (1.2581)

USA(H21)

Japan(SKD5)

 

GB/T 1299-77

0.30

¦

0.40

2.20

¦

2.70

 

0.20

¦

0.50

≤0.030

≤0.030

≤0.40

≤0.40

 

7.50

¦

9.00

 

 

 

 

 

3Cr2W8V takes "high temperature strength + thermal fatigue resistance" as its core advantage, and is suitable for high temperature and high pressure but low impact mold scenarios:

 

Smelting Method

Mainstream process: electric arc furnace (EAF) smelting.

Upgrading process: part of the production adopts the process of "rolling instead of forging" to replace the traditional forging, and optimize the cost and yield; (the blooming temperature is 1140 ~ 1200 ℃, and the hot shearing temperature is ≥ 950 ℃);

 

Process Characteristics

Heat treatment process

Process

Parameter

Target effect

Annealing

800~850℃stay for 2~4h,slow cooling to below 500℃ air cooling

Hardness 207~255 HBW,easy to process

Quenching

1050~1150℃oil cooling(lower limit of large mold)

Hardness 48~52 HRC

Tempering

selected as required (see table below)

Balance hardness and tough

 

Relationship between tempering temperature and hardness:

Tempering(℃)

560~580

610~630

650~655

680

----------------

---------

---------

---------

--------

Hardness(HRC)

47~51

47~49

42~44

Peak Toughness

Innovative technology

Austempering: heating at 1150 ℃, holding at 350 ~ 450 ℃ for 1 H and then oil cooling, the lower bainite + martensite structure is obtained, the hardness is ≥ 47 HRC and the impact resistance is improved. Solid solution ultrafining: refine the carbide distribution and prolong the service life of the die;

 

Purity

Impurity control: S ≤ 0.030%, P ≤ 0.030%; Non-metallic inclusions shall be controlled according to ASTM E45 standard (grade not specified);

 

Micro-Structure

Annealed state: pearlite + granular carbide;

Quenched state: martensite + undissolved carbide + retained austenite;

Tempered state: tempered martensite matrix + dispersed carbide (significant secondary hardening effect);

 

Impact Work

The data are not directly disclosed, but the study shows that: The toughness is poor, and high temperature tempering (such as 680 ℃) can significantly improve the toughness; The isothermal quenching process makes the impact toughness better than that of the conventional treatment ;

 

Ultrasonic flaw Detection

The standard is not specified, and the standard is commonly used in the industry (SEP 1921/ASTM A388), and the defect is required to be ≤ Φ1mm equivalent (refer to the same kind of hot work die steel);

 

Ex-Factory Status

Annealed state: hardness ≤ 255 HBW (smooth round/black fur round)

 

Size Specification

Type

Size range

Note

Round

Φ20~500 mm × 1~6 m

hot-rolled bar

Plate

Thickness 20~300 mm × W 1000~2500 mm

Customized length ≤ 12 m

Square billet

The maximum yield of 180 mm square billet(rolling instead of forging)

Billet yield 86.48%

 

Product Main Features

High temperature strength: the hardness still reaches 300 HBW at 650 ℃, and the hot hardness is excellent;

Thermal fatigue resistance: resistant to cold and hot alternating stress, suitable for frequent temperature shock scenarios;

The harden-ability is medium: the section below 80 mm can be completely hardened;

Disadvantages: low toughness and plasticity, easy to fail in high impact scenario;

 

Product Application Area

Area

Typical component

Performance adaptation point

Die casting

Die Aluminum/copper alloy die casting die,nozzle

High temperature molten metal erosion resistance (600 ~ 730 ℃)

Hot Forging/Extrusion Die Crankshaft Forging Die

Crankshaft Forging Die ,Copper Alloy Extrusion Die

High Stress Bearing + Thermal Fatigue Resistance

Shear Tools

Hot Metal Trimming Knives, Stamping Punches

High Temperature Hardness Stability

High stress die, flat forging machine

male and female die, backward extrusion die,

compressive/bending/tensile combined stress

 

Packing and Shipping

Generally, packing and transportation will be arranged according to the customer's requirements, whether to pack and arrange the appropriate mode of transportation, vehicles, such as whether to directly load and transport, whether to pack steel belts, whether to pack and spray marks, etc.

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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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