0086-571-88220973 / 88220971 [email protected]
0 Items

Material hardness (before and after heat treatment)

A.Material Hardness Values

Hardness
Value HRC
Hardness
value HRB
Hardness
Value
Vickers
Hardness
Value
Brinnell
N/mm2 Symbols DIN
-20 67 114 114 400 C15
-9 74 131 131 460 C10
1 83 154 156 560 C40 stainless 303
10 90 183 182 635
15 93 199 200 680 C55 42CrMo4 32CrMo12
20 97 221 224 760 34CrNiMo6 14NiCr14
25 101 250 249 850 34CrNiMo6 pretreated
30 105 278 276 955
35 109 320 323 1110
40 112 385 370 1270
45 115 460 427 1453  C40
hardened
50 118 535 497 1670 34CrNiMo6
hardened
32NiCrMo45
hardened
42CrMo4 hardened
55 639 545 1870 C35 hardened
57 694 576 1940
60 746 601 2110 14NiCr14
hardened
C10
hardened
63 867 652 2220 32CrMo12
nitrited
65 940 682 2300
67 1060 725 2400
70 1170 760 2640

B. Material Hardness (Heat Treatment)

The following table shows the different processes used in the heat treatment of gears
Material
Carburizing
Hardening
temperature
Quenching
method
Hardness
level
obtained
Tempering
Quenched
C40 830/860°C
Hold at 210 to 230°C
in an oil bath for
1h/25 mm
40-45 HRc
Hold at 650°C
+ Cool for one hour
in an oven or in the open air
C55 810/840°C
Hold at 210 to 230°C
in an oil bath for
1h/25 mm
40-45 HRc
Hold at 650°C
+ cool for one hour
in an oven or in the open air
42CrMo4 860/890°C
Hold at 210 to 230°C
in an oil bath for
1h/25 mm
40-45 HRc
Hold at 690°C
+ cool for one hour
in an oven or in the open air
34CrNiMo6 820/850°C
Hold at 180à200°C
in an oil bath for
1h/25 mm
40-45 HRc
Hold at 650°C
+ cool for one hour
in an oven or in the open air
Cementation
C10<Ø100
Hold at
900 to 930°C
for 1h
cementation depth 0,2mm
770/790°C
Hold at
150 to 200°C
in an oil bath
1h/25 mm
55-60 HRc
Hold at 650°C
+ cool for one hour
in an oven or in the open air
C10>Ø100
Hold at
900-930°C
for 1h
cementation depth 0,2mm
900/930°C
Hold at 150 to 200°C
in an oil bath
1h/25 mm
57-62 HRc
Hold at 650°C
+ cool for one hour
in an oven or in the open air
12NiCr14
Hold at 900-930°C
for 1h
cementation depth 0,2mm
820/840°C
Hold at 150 to 200°C
in an oil bath
1h/25 mm
57-62 HRc
Hold at 650°C
+ cool for one hour
in an oven or in the open air
*Do not stock or use at temperatures between 250 and 450°C
All values are approximate
TAGs:

Hangzhou Ever-power Transmission Co., Ltd.

Learn more about our standard products and custom solutions. Committed to providing protection for global users.

Please contact us for details.


As one of leading manufacturers, suppliers and exporters of mechanical products in China, We offer reducers, sprockets, industrial and conveyor chain, belts, pulleys, gears, racks, gearboxes, motors, PTO Shafts, taper lock Bushing, vacuum Pumps, screw air compressors and many other products.

Pin It on Pinterest