1.2714 Hot Work Mould Steel

1.2714 Hot Work Mould Steel

1.2714 tool steel is a high-performance hot-work tool steel, exhibiting excellent toughness, thermal fatigue resistance and hardenability. It is widely used in the manufacture of large forging dies, hot-cutting blades, extrusion tools and thermoplastic moulds. Through specific annealing, hardening and tempering heat treatment processes, its mechanical properties can be further optimised.

Product Details

Equivalent grades	GB		DIN		AISI		JIS		GOST
	5CrNiMoV		1.2714		L6		SKT4		5ХНМ2
Chemical Composition	C	Si	Mn	Cr	P	S	V	Ni	Mo	–
	0.50-0.60	0.10-0.40	0.65-0.95	1.0-1.2	≤0.03	≤0.03	0.07-0.12	1.50-1.80	0.45-0.55	–
Available size	Round Bar		Diameter				Length
			10-1800mm				2000-6000mm
	Flat Bar		Thickness		Width			Length
			10-1200mm		100-2200mm			2000-6000mm
Surface condition	Black surface/ Grinded/ Machined
Annealed hardness	HB248MAX
Characteristics	high plasticity, good hardenability , .good tenacity and strength, with great wear resistance
Applications	Forging dies,hot shear knives,punches,backing plate,die holders,hot punching tools
Heat treatment	Isothermal annealing		Heat to 800°Cand hold at temperature for 1/2 h to 1 h; Furnace cooling to 670°Cand hold at temperature for at least 10 hours; Cool by 10°C/h to 630°C; Cooling in air. Maximum hardness:≤240 HB
	Stress relieving		To be carried out after maching before the final heat treatment. Heat to 600-650°C, hold for 4-6 hours; Cooling in furnace to 300-350°C; Cooling in air
	Hardening		Initial preheating to 350-450°C; Second preheating to 650-750°C; Heat to hardening temperature 860-890°Cand hold at temperature; Cooling in hot oil (40-60°C); oil quenched hardness: 54-59HRC;
	Tempering		Tempering must be carried out within one hour from hardening(warm part) in the range 550-630°Cfor 4-6 hours according to hardness required, the dimensions of the parts and operating conditions

Core Advantages: Engineered for High-Temperature Strength and Toughness

The exceptional performance of 1.2714 tool steel stems from its meticulously balanced chemical composition and optimised heat treatment process:

Exceptional Thermal Stability and High-Temperature Strength: A special alloy composition confers outstanding resistance to tempering softening. Even under sustained operating temperatures of 500-600°C, it maintains high hardness and strength, effectively resisting high-temperature softening and deformation. This significantly extends service life in processes such as hot forging and hot extrusion.

Superior toughness: High strength does not equate to brittleness. 1.2714 steel possesses balanced toughness reserves, effectively absorbing impact energy. This substantially reduces the risk of fracturing or chipping during rapid thermal cycling or unexpected overload conditions, ensuring production safety and mould reliability.

Superior wear resistance and thermal fatigue resistance: 1.2714 excels under the scouring action of molten metal flow and repeated thermal stress cycles. Its outstanding wear resistance minimises cavity wear while maintaining dimensional accuracy. Exceptional thermal fatigue resistance effectively suppresses the initiation and propagation of thermal cracks (crazing), preventing premature mould failure due to thermal stress.

Superior Quenchability and Machinability: Its excellent quenchability ensures consistent, high-quality performance even in large-section moulds. Concurrently, its favourable machinability and surface polishability facilitate the production of complex, precision mould cavities while meeting demands for high-finish components.

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