H11 Heat Treatment Quenching Mold Die Steel for Zinc, Aluminium Hot Work Steel

• Customization: Available
• Type: Steel Plate
• Standard: AISI, DIN, JIS, GB
• Model NO.: ymt2343esr
• Composition: C: 0.35-0.40 Si:0.80-1.10 Mn:0.30-0.50V:0.30-0.50
• Technique: Forged
• Shape: Block
• Surface Treatment: Black Primer
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Cold Heading Steel, Mold Steel
• Application: Tool Steel Bar
• Usage: Aluminum, Magnesium, Zine Die Cast, Mold Core
• Transport Package: Container or Metal Framework
• Specification: Max 500mm thickness
• Trademark: YMT
• Origin: China
• HS Code: 7224909090

Product Description

YMT2343R is a specialized version of the high-alloy Chromium-Molybdenum-Vanadium Hot Work Tool steel.
Engineered for the most demanding high-pressure Light Alloys (Al-Mg) die casting dies, adhering to NADCA #207-2011 PUBLICATION #229 specifications.
Delivered in annealed condition at less than 230HB max. 

Main applications
High pressure Aluminium/Magnesium die casting moulds.
Moulds for low pressure Aluminium die castings.
Moulds for Aluminium gravity die castings.
Plastic injection moulds with optical mirror polishing.

The main features of YMT2343R are:
• 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
• high ductility

Chemical analysis

Alloy	C	Si	Mn	Cr	Mo	V
% in wgt	0.32-0.40	0.80-1.10	0.30-0.50	4.80-5.50	1.20-1.50	0.30-0.50

Physical and mechanical properties
Main physical properties
 

	200 °C	400°C	600°C
Modulus of elasticity [MPa]	210	183	168
Coefficient of thermal expansion  [10-6/K]	-	11.8	12.4
Thermal conductivity [W/m K]	24.4	27.1	28.5

Main mechanical properties
 

	400°C	500°C	600°C
UltimateTensileStrength  (UTS) [MPa]	1150	950	670
Yield stress (YS) [MPa]	900	750	470

Soft annealing
Suggested temperature	850°C
Heating	Max 50°C/h
Soaking time	Minimum 120 min from the temperatures settlement
Cooling	Slow in the furnace at max 25°C/h to 600°C afterward at room temperature
Stress Relieving
Suggested temperature	For material in annealed condition: 700-750 °C. For material in H+T condition or after machining: 50°C less than the last tempering
Heating	Max 100 °C/h
Soaking time	Minimum 120 min from the temperature's settlement
Cooling	Slow in the furnace at max 25 °C/h to 200°C, afterward at room temperature
Hardening
First pre-heating temperature	400 °C
Heating	Max 150 °C/h
Soaking time	25 min every 25 mm thickness
Second pre-heating temperature	600 °C
Heating	Max 150 °C/h
Soaking time	20 min every 25 mm thickness or when (Ts-Tc) < 90 °C
Third pre-heating temperature	800 °C
Heating	Max 150 °C/h
Soaking time	20 min every 25 mm thickness or when (Ts-Tc) < 90 °C
Austenitizing temperature	990-1010°C
Heating	> 150°C/h
Soaking time	t = ( x + 39 ) / 2 or 30 min from (Ts-Tc) < 15 °C
Cooling	Air, vacuum cooling, salt bath, polymer in water
First tempering temperature	560 - 590 °C
Soaking time	t' = 0,8 x + 120
Cooling	Room temperature
Second tempering temperature	higher than the temperature used for the first temper.
Soaking time	t" = 0,8 x + 120
Cooling	Room temperature
Third tempering temperature	30-50 °C lower than the max temperature previously used
Soaking time	t'" = 0,8 x + 180
Cooling	Slow cooling in the furnace up to 250 °C, afterward at room temperature