316 Stainless Hex Cap Screws
The marine and chemical-plant stainless: 2 to 3 percent molybdenum for pitting and crevice resistance in chlorides, with the same strength tables as 304.
Fully threaded hex heads with a robust design for industrial applications. Manufactured to ASME B18.2.1 with washer-face bearing surface, in all stocked grades.
Type 316 adds 2 to 3 percent molybdenum and a little more nickel to the 18-8 base. Molybdenum stabilizes the passive film against chloride attack, so 316 resists the pitting and crevice corrosion that 304 suffers in seawater, brine, deicing salt and many process chemicals. Strength, magnetism and cryogenic toughness are the same as 304, and it sits in ASTM F593 Alloy Group 2.
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What 316 Stainless must meet.
| Condition and nominal diameter (in.) | Tensile strength, min (ksi) | Yield strength 0.2% offset, min (ksi) | Elongation, min (%) | Reduction of area, min (%) | Hardness |
|---|---|---|---|---|---|
| Condition A (annealed), hot finished — all | 75 | 30 | 40 | 50 | — |
| Condition A, cold finished — ½ and under | 90 | 45 | 30 | 40 | — |
| Condition A, cold finished — over ½ | 75 | 30 | 30 | 40 | — |
| Condition B (cold worked) — ¾ and under | 125 | 100 | 12 | 35 | — |
| Condition B — over ¾ to 1 | 115 | 80 | 15 | 35 | — |
| Condition B — over 1 to 1¼ | 105 | 65 | 20 | 35 | — |
| Condition B — over 1¼ to 1½ | 100 | 50 | 24 | 45 | — |
| Condition B — over 1½ to 1¾ | 95 | 45 | 28 | 45 | — |
| Condition S (strain hardened) — 2 and under | 95 | 75 | 25 | 40 | — |
| Condition S — over 2 to 2½ | 90 | 65 | 30 | 40 | — |
| Condition S — over 2½ to 3 | 80 | 55 | 30 | 40 | — |
Values per ASTM A276/A276M-17 Tables 1 and 2 (verified against the specification). Confirm the edition called out on your purchase order with our estimating team. Condition B and S limits are shared with 304.
Solution annealed at 1900 to 2050 °F and quenched; not hardenable by heat treatment. Cold worked or strain hardened for strength. Passivated after machining.
Full 316 Stainless data sheet: chemistry, physical properties and standards →
Made to standard or to your drawing.
- Marine and offshore hardware
- Seawater cooling and desalination equipment
- Chemical and pharmaceutical process plant
- Coastal architecture and infrastructure
- Pulp and paper equipment
- Food equipment washed with chlorinated cleaners