HY 80 / 100 (MIL-S-16216) (Navsea Tech Pub T9074)
Overview
Primarily used in military applications, but also in areas where high strength is required as both grades have elevated yield strengths (HY 80 – 80ksi, HY 100 – 100ksi). In addition these grades are quenched / tempered and are also certified to MIL-S-16216. Navsea Tech Pub T9074
Specifications
| Specification | HY-80, MIL-S 16216-K | HY-100, MIL-S 16216-K |
|---|---|---|
| Type of Steel | Alloy | Alloy |
| Requirements for Delivery | A20 | A20 |
| Yield Strength (Min. ksi) | 80/100 to 3/4″ incl.; | 100/120 to 3/4″ incl.; |
| (Yield Point if 3/4″ designated YP) | 80/99.5 over 3/4″ | 100/115 over 3/4″ |
| Spec. Thickness (Max. in.) | 8 | 6 |
| Chemical Composition% Carbon (Max.) | .12/.18 to 1-1/4 incl.; .13/.18 over 1-1/4″ |
.12/.18 to 1-1/4 incl.; .14/.20 over 1-1/4″ |
| Manganese | .10/.40 | .10/.40 |
| Phosphorus (Max.) | .025 | .025 |
| Sulphur (Max.) | .025 | .025 |
| Silicon | .15/.38 May be .08 Min. when vacuum carbon deoxidized | .15/.38 May be .08 Min. when vacuum carbon deoxidized |
| Chromium | 1.00/1.80 to 1-1/4″ incl.; 1.40/1.80 over 1-1/4 – 3″ incl.; 1.50/1.90 over 3″ | 1.00/1.80 to 1-1/4″ incl.; 1.40/1.80 over 1-1/4 – 3″ incl.; 1.50/1.90 over 3″ |
| Nickel | 2.00/3.25 to 1-1/4″ incl.; 2.50/3.50 over 1-1/4 – 3″ incl.; 3.00/3.50 over 3″ | 2.25/3.50 to 1-1/4″ incl.; 2.75/3.50 over 1-1/4 – 3″ incl.; 3.00/3.50 over 3″ |
| Molybdenum | .20/.60 to 1-1/4″; .35/.60 over 1-1/4 – 3″ incl.; .50/.65 over 3″ | .20/.60 to 1-1/4″; .35/.60 over 1-1/4 – 3″ incl.; .50/.65 over 3″ |
| Copper | .25 | .25 |
| Other Elements | .02 Ti .03 V |
.02 Ti .03 V |
| Heat Treatment Required | Q&T | Q&T |