TYPICAL
ANALYSIS:
|
C.
|
Si.
|
Cr.
|
Mn.
|
|
2.10%
|
0.30%
|
12.50%
|
0.30%
|
BS4659
BD3 is a high carbon, high chromium alloy tool steel
with excellent resistance to wear and abrasion. It has good
through hardening properties and dimensional stability combined
with high resistance to tempering.
Forging:
Heat slowly and uniformly to 700°C, then more rapidly to 900/1040°C.
After forging cool slowly.
Annealing:
Anneal at 900°C and slow furnace cool. Hardness after annealing
will be approx. 225 brinell.
Stress
Relieving: If machining operations have been heavy
or if the tool has an unbalanced section, remove stresses before
hardening by heating up to 700°C, equalise, then cool slowly.
Hardening:
Pre heat to 750/800°C and thoroughly soak. Continue heating
to the final hardening temperature of 950/980°C and allow the
component to be heated through. Quench in oil or cool in air.
Tempering:
Heat uniformly and thoroughly at the selected tempering temperatures
and hold for at least one hour per inch of total thickness.
Double tempering should be carried out with intermediate cooling
to room temperature. For your guidance refer to our colour
charts for forging, hardening and tempering.
|
Tempering °C
|
150
|
200
|
250
|
300
|
350
|
400
|
|
HRC
|
64/63
|
63/61
|
62/60
|
61/60
|
60/59
|
59/58
|
For price and availability
contact our friendly and helpful staff.
|
