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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
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