flat steel bar d5

flat steel bar d5 1.Alloy tool steel 2.high hardenability, good hardness and wear resistance 3.flat steel bar d5

 flat steel bar d5

 Cr12MoV alloy bar

2.Cr12MoV have high hardenability,300-400mm or less section completely hardenability ,when the temperature get to 300~400°C still have good hardness and wear resistance

3.Used to make a larger section ,complex shape, withstand greater impact load molds and tools

such as complex shape of the punching concave mold, complex mold insert ,cold extrusion die, cold-cut scissors, circular saws, standard tools, measuring tools, etc

4.Chemical Composition (%):(For reference only)

C	Si	Cr	V	Mo	S	P	Mn
1.45~1.70	≤0.4	11.00~12.50	0.15~0.30	0.40~0.60	≤0.030	≤0.030	≤0.35

Delivery of hardness and quenching hardness

Steel name	Delivery status		Quenched specimens
	Hardness HBW	Impressiondiameter (mm)	Quenching temperature/°C	Cooling medium	hardness ≥HRC
Cr12MoV	255~207	3.8~4.2	950~1000	oil	58

5. Physical properties

Cr12MoV critical temperature

Critical point	Ac1	Acm	Ar1
temperature(approximation)/°C	810	1200	760

Cr12MoV The expansion coefficient

temperature /°C	20~100	20~400	20~600
expansion coefficient /°C-1	10.9×10-6	11.4×10-6	12.2×10-6

6. Cr12MoV Hot Working Technology

Item	Heating temperature /°C	Began to temperature/°C	End temperature/°C	Cooling
Steel ingot Steel billet	1100~1150 1050~1100	1050~1100 1000~1050	900~850 900~850	Slow cooling (pit or furnace cooling) Slow cooling (sand or furnace cooling)

7. Cr12MoV heat treatment

A. beforehand heat treatment

Forging after annealing

Forging after isothermal annealing

High--temperature tempering

Cr12MoV steel phase composition hardness and microstructure after annealing