ASTM A194 Grade 7M
Heavy Hex Nuts
ASTM A194 Grade 7M is a standard material specification for high tensile nuts and other internally threaded fasteners, made from carbon steel.
Grade 7M nuts can be produced by means of hot forging, cold forging or machining from heat treated bar stock.
ASTM A 194 Grade 7M
Heavy Hex Nuts.
Chemical Compositions % :
Type AISI 4140 Materials.
Elements |
CarbonC |
ManganeseMn |
PhosphorusPh |
SulphurS |
SiliconSi |
ChromiumCr. |
MolyMo. |
Percentage % |
0.38-0.48 |
0.75-1.00 |
0.035 Max. |
0.040 Max |
0.15-0.35 |
0.80-1.10 |
0.15-0.25 |
Mechanical Properties:
Size |
Brinnel Hardness BHN |
Rockwell Hardness HRB |
Rockwell Hardness HRC |
All Sizes |
159 TO 235 |
84-99 |
24- 35 |