Pro/Calc
Material Directory - Spindle Speed Calculator
DESCRIPTION OF STEEL CLASSES
Material
Code
A2
A36
D2
H13
O1
S7
6AL-4V
1018
1040
1117
1137
12L14
17-4PH
203
301
303
304
Brinell
Hardness
225
170
225
250
225
200
300
175
250
150
200
150
175
200
250
200
250
DESCRIPTION
Tool steel
Structural steel/iron
Tool steel
Tool steel
Tool steel
Tool steel
T16A1-4V Titanium
Free machining carbon steel
Free machining carbon steel
Free machining carbon steel
Free machining carbon steel
Free machining carbon steel, leaded
Precipitation hardening stainless
Stainless, free machining
Stainless
Stainless, free machining
Stainless
Material
Code
410
431
440C
4130
4140
4150
41L45
4340
4620
5160
6061T
6150
8620
Brinell
Hardness
200
250
250
250
325
325
250
275
250
250
100
250
225
DESCRIPTION
Stainless
Stainless
Stainless
Free machining alloy steel
Free machining alloy steel
Free machining alloy steel
Free machining alloy steel, leaded
Alloy steel
Alloy steel
Alloy steel
Aluminum
Alloy steel
Alloy steel
*HEAT TREATED
1040*
4140*
4340*
8620*
400 B
40 RC
50 RC
350 B
Free machining carbon steel
Free machining alloy steel
Alloy steel
Alloy steel
Note:
B = Brinell Hardness
RC = Rockwell Hardness
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