316 at a glance
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Designation
| Item | Value |
|---|---|
| Designation | 316 |
| Class | Steel and stainless |
| Type | austenitic stainless steel |
Composition
| Item | Limit | Source |
|---|---|---|
| Composition | Chromium 16.0–18.0 %, nickel 10.0–14.0 %, molybdenum 2.0–3.0 %, carbon up to 0.08 % | ASTM A240/A240M Table 1 (UNS S31600) |
Properties
| Property | Value | Source |
|---|---|---|
| Specs | AMS 5524 annealed, AMS 5907 ¼ hard | MIL-HDBK-5J, Table 2.7.1.0(b) footnote c |
| Allowables | The 301 table applies for those two conditions only | MIL-HDBK-5J, Table 2.7.1.0(b) footnote c |
| Welding rod | 316L, AWS A5.9 | AC 43.13-1B CHG 1, Table 4-15 |
| Corrosion class | 300 series: much more corrosion resistant than 400 series, particularly in a marine environment | AC 43.13-1B par. 6-164b |
Design allowables — sheet and strip (properties of AISI 301 table, applicable to 316)
0.187 in and under. MIL-HDBK-5J Table 2.7.1.0(b), footnote c.
| Temper | Specification | Ftu L / LT, ksi | Fty L / LT, ksi | Fsu, ksi | Basis |
|---|---|---|---|---|---|
| Annealed | AMS 5524 | 73 / 75 | 26 / 30 | 50 | S |
| ¼ hard | AMS 5907 | 124 / 122 | 69 / 67 | 66 | A |
Properties of the 300-series alloys that the handbook ties to Table 2.7.1.0(b) by footnote. Only annealed and ¼ hard are covered for 316. Table 2.7.1.0(b), p. 2-223.
Notes from the guide
- Only two tempers are covered and values are borrowed from 301.
- Not a general upgrade to 304. Use what the drawing says.
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Sources
- MIL-HDBK-5J, Metallic Materials and Elements for Aerospace Vehicle Structures (31 Jan 2003) — Table 2.7.1.0(b), footnote c, p. 2-223. Cancelled; superseded by MMPDS.
- FAA AC 43.13-1B CHG 1 — Table 4-15 and par. 6-164.
- FAA-H-8083-31B, Aviation Maintenance Technician Handbook, Airframe, Volume 1 — Chapter 5, p. 5-22.
- MMPDS (formerly MIL-HDBK-5) — the current home of design allowables. A repair substantiation cites MMPDS or the SRM, not a website.
- ASTM A240/A240M, Plate, Sheet, and Strip of Chromium and Chromium-Nickel Stainless Steel — Table 1, chemical requirements (edition 10b read).
Educational reference only. not approved data. Always consult the applicable SRM, AMM, or AC 43.13-1B and your certifying authority.