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| 410 / 420 Stainless Steel | 416 Stainless Steel |
| |
| Typical Analysis : |
| Carbon |
0.15% max |
Manganese |
1.25% max |
Silicon |
1.00% max |
| Chromium |
12.00/14.00% |
Molybdenum |
0.060% max |
Sulfur |
0.15% min. |
|
| |
| Corrosion Resistance :
|
| 416 Stainless has been used for corrosion
resistance to mild atmospheres, fresh water, steam, ammonia,
many petroleum products and organic materials and several mild
acid environments. A polished finish is not necessary, but a
smoother surface is helpful in providing added corrosion resistance.
For optimal corrosion resistance, surfaces must be free of scale
and foreign particles and finished parts should be passivated. |
| |
| Workability : |
| Hot Working :
Although this grade can be forged, it is not recommended for
upsetting operations. To forge, heat uniformly to 1149/1232
°C, then forge and cool in air. Cool large forging
slowly in dry lime or ashes. Trim hot if possible; otherwise,
anneal and trim cold. Do not forge below 927 °C.
Machinability : 416
Stainless has easy machining properties, with speeds comparable
to 1144 and 8620 leaded.
|
| Heat Treatment : |
Annealing :
Heat uniformly to 650 / 760 °C; soak, then remove from
the furnace and cool in air. Brinell hardness approximately
187. For maximum softness anneal from a temperature of 816
/ 00 °C and cool in furnace. Brineel hardness 155.
Hardening : Heat to
928 / 1038 °C, soak at heat at least ½ hour,
quench in oil. Hardness as quenched will be RC 36 to 41. Air
cooling yield about Rockwell C 35-39.
Tempering : Temper to
secure the hardness and mechanical properties required.
Typical Mechanical Properties :
Typical Room Temperature Mechanical Properties
1'' (25.4 mm) round bar, hardened 1800 °F (982 °C) ½ hour, oil quench, tempered two hours
Tempering
Temperature |
0.2%Yield
Strength |
Ultimate
Tensile
Strength |
% Elongation
In 2’’
(50.8 mm) |
% Reduction
Of Area |
Hardness |
Impact Strength |
°F |
°C |
Ksi |
MPa |
Ksi |
MPa |
Brinell |
Rockwell |
Izod |
Charpy
V-Notch
|
Ft-Ib |
J |
Ft-Ib |
J |
300 |
149 |
138 |
951 |
176 |
1213 |
10 |
20
|
363
|
C38
|
20 |
27 |
20 |
27 |
500 |
260 |
136 |
938 |
171 |
1179 |
11 |
32 |
352 |
C37 |
25 |
34 |
22 |
30 |
700 |
371 |
136 |
938 |
171 |
1179 |
14 |
45 |
352 |
C37 |
20 |
27 |
22 |
30 |
900 |
482 |
125 |
862 |
160 |
1103 |
15 |
45 |
331 |
C35 |
16 |
22 |
15 |
20 |
1000 |
538 |
110 |
758 |
137 |
945 |
16 |
50 |
285 |
C30 |
25 |
34 |
23 |
31 |
1100 |
593 |
95 |
655 |
114 |
786 |
17 |
54 |
235 |
C22 |
40 |
54 |
40 |
54 |
1200 |
649 |
83 |
572 |
103 |
710 |
21 |
57 |
207 |
B95 |
55 |
75 |
50 |
68 |
1300 |
704 |
75 |
517 |
95 |
655 |
21 |
60 |
187 |
B92 |
80 |
108 |
75 |
102 |
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