ASTM A194 8C Grade are manufactured from AISI 321 (UNS S34700) stainless steel, by either forging by hot or cold method or machine from conditioned bar, in a carbide solution treated condition for corrosive resistant applications.
Manufactured to ASTM A194 standard specification, LoneStar Fasteners Europe can also offer with supplementary requirements of the standard as required by the application.
ASTM A194 8C: Forms
| LoneStar Manufacture | ||
| Imperial Nuts – Heavy and Normal Series – Including ANSI B18.2.2 | ✓ | |
| Metric Nuts – Regular and High types – Including DIN 934 H=D, ISO | ✓ | |
| Available with locking features | ✓ |
ASTM A194 8C: Sizes and Threads
| LoneStar Manufacture | ||
| Metric Coarse | ✓ | |
| Metric Fine | ✓ | |
| Imperial UNC | ✓ | |
| Imperial 8UN | ✓ | |
| Imperial UNF | ✓ | |
| ACME | ✓ | |
| Metric sizes available | Up to M100 | |
| Imperial sizes available | Up to 4.00″ |
Chemical Composition
| Carbon | 0.08 | % Max |
| Manganese | 2.00 | % Max |
| Phosphorus | 0.045 | % Max |
| Sulphur | 0.03 | % Max |
| Silicon | 1.00 | % Max |
| Chromium | 18.0-20.0 | % |
| Nickel | 8.0-11.0 | % |
| Molybdenum | – | … |
| Copper | – | … |
| Niobium | – | … |
| Titanium | – | … |
| Vanadium | – | … |
| Aluminium | – | … |
| Nitrogen | – | … |
Mechanical Properties
| Proof Load | Hardness | Hardness, max | Hardness, min | |
| Up to 4” Inc. | ASTM A194 Table 3 + 4 |
126-300 HB | 32 HRC | 60 HRB |
Similar or Equivalent Standards
| AISI 304 |
| AFNOR Z6 CN 18.09 |
| DIN X5 CrNi 18.09 |
| B.S. 1506-801 GrB |
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