Tool/Die/Mould Steel Grade Flat Plate Round Bar Block Alloy Mould Special Steel

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Min Order 10 kg
Shipping From Jiangsu, China
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Jiangsu Longchangxing New Material Technology Co Ltd.

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Profile Certified by SGS/BV
ymt8518
Alloy Steel Bar
AISI, ASTM, DIN, JIS, GB
Forged
Block
Black Primer
High-strength Steel Plate, Wear Resistant Steel, Mold Steel
Tool Steel Bar
Block
Ultrasonic Testing
Customizable
High Strength
High Hardness
Corrosion Resistance
YMT
Container and / or Metal Framework
in terms of mm x mm x mm
China
7224901000
Product Description



 

Product Description



YMT 8518R is a groundbreaking high alloyed Chromium-Molybdenum-Vanadium Hot Work Tool steel. Expertly engineered for the most rigorous high-pressure Light Alloys (Al-Mg) die casting dies, it complies with NADCA #207 standards, ensuring superior annealed microstructure, minimal banding segregation, and exceptional impact capability. YMT8518R is designed to achieve unparalleled performance levels. It is delivered in annealed condition with a hardness value below 230 HB.

Main features
excellent isotropy;
• high mechanical properties and strength
• high hardenability
• high thermal conductivity
• high tempering resistance;
• high thermal stability
• high thermal fatigue and hot cracking resistance;
• excellent fracture toughness in hot and cold conditions;
• high ductility
• high wear and erosion resistance
• high oxidation resistance
• required very high core temperature to optimally perform
• suitable for medium and large dies (up to 2 tons)
• suited for long run dies producing thick walled pieces

Main application
• High pressure Aluminum/Magnesium die casting molds;
• Molds for low pressure Aluminum die castings;
• Molds for Aluminum gravity die castings;

Chemical analysis

AlloyCSiMnCrMo V
% in weight0.32-0.400.10-0.300.30-0.504.80-5.502.00-2.400.40-0.70


Physical and mechanical properties
Main physical properties
 
 200 °C400°C600°C
Modulus of elasticity
[MPa]
210180145
Coefficient of thermal expansion
 [10-6/K]
-12.813.4
Thermal conductivity
[W/m K]
-31.033.0


Main mechanical properties
 
 400°C500°C600°C
Ultimate Tensile Strength
 (UTS) [MPa] 
12001100850
Yield stress (YS) [MPa]1000910610
Soft annealing  
Suggested temperature850°C
HeatingMax 50°C/h
Soaking timeMinimum 120 min from the temperature settlement
CoolingSlow in the furnace at max 25°C/h to 600°C afterward at room temperature
  
Stress Relieving  
Suggested temperatureFor material in annealed condition: 650 °C. For material in QT condition or after machining: 50°C less than the last tempering
HeatingMax 100 °C/h
Soaking timeMinimum 120 min from the temperature's settlement
CoolingSlow in the furnace at max 25 °C/h to 200°C, afterward at room temperature
  
Hardening 
First pre-heating temperature400 °C
HeatingMax 150 °C/h
Soaking time25 min every 25 mm thickness
Second pre-heating temperature600 °C
HeatingMax 150 °C/h
Soaking time20 min every 25 mm thickness or when (Ts-Tc) < 90 °C
Third pre-heating temperature800 °C
HeatingMax 150 °C/h
Soaking time20 min every 25 mm thickness or when (Ts-Tc) < 90 °C
Austenitizing temperature980°C
Heating> 150°C/h
Soaking timet = ( x + 39 ) / 2 or 30 min
from (Ts-Tc) < 15 °C
CoolingAir, vacuum cooling, salt
bath, polymer in water
First tempering temperature550 °C
Soaking timet' = 0,8 x + 120
CoolingRoom temperature
Second tempering temperatureBased on mechanical properties required
Soaking timet" = 0,8 x + 120
CoolingRoom temperature
Third tempering temperature30-50 °C lower than the max temperature previously used
Soaking timet'" = 0,8 x + 180
CoolingSlow cooling in the furnace up to 250 °C, afterward at room temperature

Chrome plating
It can be Chrome plated in order to enhance the mechanical characteristics on the surface.
In order to prevent Hydrogen embitterment, within 4 hours of Chrome plating it is advisable to carry out heat treatment at 200 °C for about 4 hours.

Nitriding
It is suitable for ionic and gas nitriding. This treatment is very useful for molds subjected to
extremely stressful applications. The increase of the surface hardness, following nitriding, extends the component life cycle.

Polishing and photo engraving
It is the suitable material when polishing and photoengraving are needed. Thanks to its integrated manufacturing process, those material manufactured by our steel mill characterized by a high degree of purity.

 

Certifications

Company Profile

It is a comprehensive enterprise of mold raw material research and development, sales, mold base, heat reatment and other related supporting services.
Jiangsu Longchangxing New Material iechnology Co, td. was establishedin 2006. tis a comprehensive enterprise integrating research and development sales,predise miing;mold basemanufactumng, heat treatment and other relted supporting serices for mold stee. The companys ageny brands indude: Daido, Germany HE Norheast specal teel. shanghaiBaostel and otherwelknown intermationaland domestic brands of specialstel. since its establishment, the companyhas ben adherng to the tenet of"qualityas the root honesty asthe foundaton", market onented,and has won the support and trust of new and old customers from al walks of life with hioh-quality prducts and eficient senices. The company iscurrently in the leading position of the industry field.it ranks first in the.domestic applanceand automotive liahting industry in terms of sales of mold steel.

Our Advantages
Engineering Solutions
Total solution for die stee
A comprehensive enterprise integrating R&D, sales, precise milling,mold base manufacturing,heat treatment and other related supporting services for mold steel.

Customer oriented
Consider cost reduction and benefit for customers
Owns its own brand of die steel,lmported quality and domestically produced prices provide you witha strong cost-reduction advantage

Craftsmen with better qualityDedication, professional, stable quality, excellent serviceFull-time inspection technicians are set up to conduct inspections at the time of purchase,inspections during production, and quality appraisals required by customers after delivery in theinherent laboratory.

German HF is a vertically integrated holding company, integrating R&D, technology andsales; its headquarters is located in Frankfurt, Germany; German HF is committed to workingwith the world's top steel mills to create high-end, high-quality tool steel and it has providedsolution for steel making and turned to be a pioneer and leader of mold steel; Hf is also oneof the main suppliers of plastic and die-casting mold materials in Europe. JiangsuLongchangxing New Material Technology Co., Ltd. is the general agent of German HF in China.

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