10
WORKPIECE MATERIAL
TYPE
GRADE
CARBON
STEEL
&
ALLOY
STEEL
TYPICAL PHYSICAL
PROPERTIES
CODE TYPE
FREE CUTTING
0.3 to 0.4% Carbon
0.3 to 0.4% Carbon
0.4 to 0.7% Carbon
0.4 to 0.7% Carbon
HARDNESS
BRINELL
(MAX)
TONS PER
SQ.INCH
(MAX)
N / mm²
(MAX)
STAINLESS
STEEL
HEAT
RESISTING
ALLOYS
TITANIUM
CAST
IRONS
150
170
248
206
286
35
40
59
47
67
540
620
910
720
1030
Low Alloy Tool
Steels
High Alloy Tool Steels
Heat Treatable Steels
248
330
380
59
75
87
910
1150
1300
Martensitic
(400 Series)
248
Austenitic (Work
Hardening)
(300 Series)
300
54
65
810
1000
Inconell, Hastelloy
Nimonic Alloys
350
78
1200
Commercially Pure
CommerciallyAlloyed
275
350
65
78
1000
1200
Grey Irons
Nodular Irons
Malleable Irons
110 - 300
-
-
MANGANESE
STEEL
ALUMINIUM
MAGNESIUM
ALLOYS
COPPER
ALLOYS
PLASTICS
AS SUPPLIED
Wrought Alloys
Cast Alloys
Silicon Alloys
Moderately
Machineable Alloys
LEADEDCOPPERALLOYS
FREE CUTTING BRASS
MEDIUM TO HIGH LEADED BRASS
LOW TO HIGH SILICON BRONZE
MANGANESE BRONZE
ALUMINIUM SILICON BRONZE
COMMERCIAL BRONZE 90%
PHOSPHOR BRONZE 5 - 10%
ALUMINIUM BRONZE
Soft
Hard
Reinforced
Free Cutting Alloys
Difficult to Machine
Alloys
DRILL TECHNICAL DATA
AS SUPPLIED
AS SUPPLIED
141 - 142
147 - 148
151 - 152
153
z
- 163
z
STUB
DRILLS
JOBBER
DRILLS
101 - 102
105
154
z
- 164
z
155 - 161
167 - 177
AS ABOVE
AS ABOVE
AS ABOVE
AS ABOVE
AS ABOVE
AS ABOVE
AS ABOVE
AS ABOVE
155
z
AS ABOVE
AS ABOVE
AS ABOVE
AS ABOVE
155
z
AS ABOVE
156
z
AS ABOVE
156
z
AS ABOVE
AS ABOVE
AS ABOVE
AS ABOVE
156
z
