55NiCrMoV7/1.2714 Hot Work Tool Steel
55NiCrMoV7/1.2714 is an Ni alloyed die steel which has extreme toughness and good through hardening properties with very little size change after heat treatment.55NiCrMoV7/1.2714 is similar to AISI/SAE L6,and is used for making forging dies,hot shear knives,punches,backing plate,die holders,hot punching tools.
|Equivalent Grade Chemical Composition|
Annealing For 55NiCrMoV7/1.2714
1.Nominal Annealing temperature:650-700°C
2.Cool slowly in the furance
3.Maximum Brinell hardness of 255
Hardening and Tempering(QT) For 55NiCrMoV7/1.2714
1.Nominal Hardening temperature:830-870°C for oil,830-890°C for air.
2.Hold at the temperature then quench in oil or air.
3.Tempering as soon as possible when the temperature low to ambient temperature
4.Heat uniformly to the required temperature allowing a soaking time of two hours per 25mm of ruling section.
5.A second tempering is highly recommended.
6.keep the material out of the furnace ,then cool in the air
Stress Relieving For 55NiCrMoV7/1.2714
1.Stress relieving should be carried out by heating to 650-700°C to reduce distortion during heat treatment.
2.Cooling in furnace to 300-350°C
3.Cooling in air
Mechanical Property( for reference only)
1.Tensile strength: 1220-1330MPa
2.Yield point: 1100MPa
3.Percentage reduction of area after fracture: 55%
4.Elongation after fracture: 14%
1.Shape:Round/Square / Flat/Shafts/Rollers/Blocks
2.Surface condition:Black surface/Bright surface
4.Straightness:Max 3mm/m(Enhanced straightness may be available on request)
5.Length:3000-5800mm suitable for 20″container. above 6000mm,suitable for 40″ container
6.Grain Size: 5-8 acc to ASTM E112-96
8.Ultrasonic Standard: Sep1921/ASTM A388/EN 10228-3
9.Non Metallic Inclusion: 2 max acc to ASTM E45 /K4≤20 acc to DIN 50602
10.Forging Ratio: minimum 4 : 1
11.Marking: Grade/Weight/Length/Size/Heat Number
A material test report(Inspection Certificate EN 10204 3.1) will be provided, documenting the following:
4.Non Metallic Inclusion
5.Heat Treatment Process
8.NDE test method/criteria
55NiCrMoV7/1.2714 hot work tool steel manufacturers and suppliers, supplied in round rods,square/flat bars,rollers,shafts,blocks and forging pieces.