BT4
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Material Technical Standard of BS 4659 - 1989 High Speed tool steel BT4 data sheet,BT4 Chemical compositions, BT4 Mechanical properties from Steelmaking, ESR melted, Hot blooming,BS BT4 Hot forging, Hot rolling, BT4 Heat treatment, Straightening, 100% Ultrasonic flaw test, Cold working, Peeled or rough turned machining. Technical specification - BS 4659-1989. 100% Ultrasonic test ASTM E2375 /SAE AMS 2154 /SEP 1923 /GB/T 4162 /EN 10228-3.
TECHNICAL DATA SHEET - BS BT4
MATERIAL CATEGORY: Tungsten series High speed tool steel
MATERIAL SPECIFICATIONS: BS 4659-1989
MATERIAL SPECIFICATIONS: BS 4659-1989
CHEMICAL COMPOSITIONS (WEIGHT - %)
C (％): 0.70 ~ 0.80
C (％): 0.70 ~ 0.80
Si (％): ≤ 0.40
Mn (％): ≤ 0.40
P (％)≤: 0.030
S (％)≤: 0.030
P (％)≤: 0.030
S (％)≤: 0.030
Cr (%): 3.75 ~ 4.50
Mo (%): ≤ 1.00
W (%): 17.5 ~ 18.5
V (%): 1.00 ~ 1.25
Co (%): 4.50 ~ 5.50
HEAT TREATMENT PRACTICE AND HARDNESS
Annealing temperature /℃: 870 ~ 890
Annealed hardness, ≤ HB: 255
Quenching temperature /℃: 1270 ~ 1290
Cooling medium: Oil or Air
Tempering temperature /℃: 550 ~ 570
Hardness under tempered condition HV: 823 min.
Tempering temperature /℃: 550 ~ 570
Hardness under tempered condition HV: 823 min.
MELTING PROCESS
This alloy is generally smelt in Non-vacuum furnace + ESR, Electric Arc Furnace (EAF).
For a purpose of superior quality, it should be smelt via technology of Electroslag remelting or vacuum refining or by agreement.
PRODUCT PROFILE AND AVAILABLE FORMS
Round bar (Diameter): 0.30 to 450mm
Square bar / Flat bar: THK 3 to 500mm X Width 3 ~ 1200mm
This alloy is generally smelt in Non-vacuum furnace + ESR, Electric Arc Furnace (EAF).
For a purpose of superior quality, it should be smelt via technology of Electroslag remelting or vacuum refining or by agreement.
PRODUCT PROFILE AND AVAILABLE FORMS
Round bar (Diameter): 0.30 to 450mm
Square bar / Flat bar: THK 3 to 500mm X Width 3 ~ 1200mm
Wire rod (Diameter): 0.30 to 16mm
Steel strip: THK0.15 ~ 2.50 X W8.0 ~ 600mm
Length: Fixed length or random length or based on the customer's special requirement.
Steel strip: THK0.15 ~ 2.50 X W8.0 ~ 600mm
Length: Fixed length or random length or based on the customer's special requirement.
Other different shapes based on OEM.
TECHNICAL SALES ASSISTANCE & SERVICE
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