ASTM A194 Grade 1 Nuts
Standard Specification for Carbon and Alloy Steel Nuts for Bolts for High Pressure or High Temperature Service, or both.
ASTM A194 specification covers a variety of carbon, alloy, and martensitic stainless steel nuts in the size range 1/4 through 4 in. and metric M6 through M100 nominal. It also covers austenitic stainless steel nuts in the size range 1/4 in. and M6 nominal and above. These nuts are intended for high-pressure or high-temperature service, or both.
ASTM A194 Grade 1 Chemical Components
| Grade | Material | UNS Number |
C, % | Mn, % | Ph, % | S, % | Si, % | Cr, % | Ni, % | Mo, % | Ti, % | Cb & Ta, % | N, % | Other Elements, % |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Carbon | 0.15 min | 1.000 | 0.040 | 0.050 | 0.400 | - | - | - | - | - | - | - |
ASTM A194 Grade 1 Hardness Requirement
| Grade & Type | Brinell Hardness | Rockwell Hardness | |
|---|---|---|---|
| C Scale | B Scale | ||
ASTM A194 Grade 1 Proof Load (Inch Series)
| Nominal Size, inch | Threads per inch | Stress Area inch | Proof Load, lbf | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| GRADE 2, 2HM, 6, 6f, 7M | Grade 2H, 4, 7, 16 | All Types of Grade 8 | ||||||||
| Heavy Hex | Hex | Heavy Hex | Hex | Heavy Hex | Hex | |||||
ASTM A194 Grade 1 Marking
| Grade Type | Hot Forged or Cold Punched Nuts | Nuts Machined from Bar Stock |
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