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) 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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