Round bar D3 steel
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1.Specifications of d3 steel:
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Round bar
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Diameter(mm)
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Length (mm)
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10~410
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3000~5800
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Plate
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Thickness(mm)
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Width (mm)
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Length (mm)
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Max:25-200mm
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50-610mm
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2000~4000
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The size can be customed!
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2.Equivalent grade:
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AISI/ASTM
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GB
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DIN
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JIS
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BS EN ISO
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D3
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Cr12
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1.208
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SKD1
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X210Cr12
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3.Chemical composition(%) of d3 steel:
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C
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Si
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Mn
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Cr
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S
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P
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2.00-2.30
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≤0.40
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≤0.40
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11.50-13.00
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≤0.03
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≤0.03
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4.Heat treatment:
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Isothermal annealing:
- Heat to 850°Chold for 1/2 hour to 1 hour;
- Furnace cooling to 770°C and hold at temperature for at least 10 hours;
-Cool by 10°C /h to 720°C;
-Cooling in air.
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Stress relieving:
To be carried out after machining and before the final heat treatment.
-Heat to 650-700°C, hold for 4/6 hours:
-Furnace cooling to 330-350°C;
-Cooling in air.
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Hardening:
-Initial preheating to 350-450°C;
-Second preheating to 750-850°Cin salt bath at 850°C;
-Austenitizing at 960-100°C;
-Cooling in fluid oil.
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Tempering hardness: 64-65 HRC
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5.Application:
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1.Steel with wear resistance and fairly good dimensional stability during heat treatment.
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2.Rolls for cold strip mills and wire squeezer mills, circular knives and shear blades.
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3.Dies for small metal parts, punches and drawing dies, dies for sintering, forming tool rollers, shear blades.
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4.Molds for plastic materials. Statically and dynamically stressed components for vehicles,engines and
machines.
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5.For parts of larger cross-sections,crankshafts,gears,wear-resisting press tool and guide palte.ect.
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6.Characteristic:
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1.Very high resistance against abrasive and adhesive wear due to a high volume of hard carbidesin the steel.
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2.Matrix moderate machinability good dimensional stability
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3.Toughness and through hardenability
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7.Machinability
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The machinability rating of D3 is roughly 25 % that of free machining carbon steel 1018.
Due to its abrasion resistant nature, machining in the hardened condition should be limited to finish grinding.
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8.Inspection:
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100% Ultrasonic according to the test standards:SEP1921-84,GR.3 CLASS C/C or by SGS ,AHK or Alex Stewart |