ATI 13-8™
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ATI 13-8™ Precipitation Hardening Alloy (UNS S13800, ASTM Type XM-13) INTRODUCTION ATI 13-8™ alloy (UNS S13800) is a martensitic precipitation-hardening stainless steel that has excellent strength, high hardness, superior toughness, and good corrosion resistance. Good transverse toughness properties are achieved by tight chemical composition control, low carbon content, and vacuum melting. The alloy is produced by vacuum induction melting (VIM) followed by electro-slag remelting (ESR). This melt practice promotes excellent macro- and microcleanliness, and tight compositional control. The strengthening mechanism (precipitation hardening in a martensitic matrix) makes it possible to achieve uniform strengthening in heavy sections. Strength and ductility levels can be tailored to the application by varying the aging temperature. Typical applications are large airframe structural components, injection molding equipment and slide gates to control water flow. The S13800 alloy is martensitic in structure in the solution annealed condition and is further strengthened by a relatively low temperature heat treatment, which precipitates a strengthening phase in the alloy. Like the S17400 alloy, the S13800 alloy requires only a simple heat treatment, a one step process conducted at a temperature in the range 950°F (510°C) to 1150°F (620°C) depending on the combination of strength and toughness desired. A wide range of properties can be produced by this one step heat treatment. Heat treatment at about 950°F (510°C) produces the highest strength. FORMS AND CONDITIONS The ATI 13-8™ Precipitation Hardening alloy is furnished by ATI as plate. Long products are also produced by ATI. In all forms, the material typically is furnished in the solution annealed condition. The ATI 13-8™ Precipitation Hardening Alloy (S13800) is covered by the following wrought product specifications. Allegheny Technologies Incorporated 1000 Six PPG Place Pittsburgh, PA 15222-5479 U.S.A. www.ATImetals.com Data are typical, are provided for informational purposes, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice. We make no representation or warranty as to its accuracy and assume no duty to update. Actual data on any particular product or material may vary from those shown herein. TM is trademark of and ® is registered trademark of ATI Properties, Inc. or its affiliated companies. ® The starburst logo is a registered trademark of ATI Properties, Inc. © 2014 ATI. All rights reserved.

CORROSION AND OXIDATION RESISTANCE ATI 13-8™ alloy has excellent oxidation resistance up to 1,500°F (815°C). Resistance to stress corrosion cracking improves as aging temperature increases. This alloy has the best resistance to stress corrosion cracking of all of the precipitation hardenable stainless steels. Its resistance to general corrosion is greatest in the fully-hardened condition. The alloy shows very little rusting when exposed to a 5 percent salt fog at 95°F (35°C). PHYSICAL PROPERTIES Melting Range: 2560 to 2680°F 1405 to 1470°C Density: 0.279 lbs/in3 Allegheny Technologies...

ATI 13-8™ Technical Data Sheet HEAT TREATMENT The ATI 13-8™ Precipitation Hardening Alloy is produced in the annealed condition. This is also called the solution heat treated condition, or Condition A. Solution treat from 1675 to 1725°F (910 to 940°C) for 15 to 30 minutes at temperature. Air cool or oil quench to below 60°F (15°C) to effect complete transformation to martensite. Aging is normally carried out from 950 to 1150°F (510 to 620°C), depending upon the desired final properties. Heat treatment is usually performed in air. Heat treatment of brazed components may be done in inert...

Temperature, °F Allegheny Technologies Incorporated 1000 Six PPG Place Pittsburgh, PA 15222-5479 U.S.A. www.ATImetals.com Data are typical, are provided for informational purposes, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice. We make no representation or warranty as to its accuracy and assume no duty to update. Actual data on any particular product or material may vary from those shown herein. TM is trademark of and ® is registered trademark of ATI...

ATI 13-8™ Technical Data Sheet Fracture Toughness of ATI 13-8™ Alloy Time to 0.2% Creep for ATI 13-8™ Alloy Time to Rupture for ATI 13-8™ Alloy Data are typical, are provided for informational purposes, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice. We make no representation or warranty as to its accuracy and assume no duty to update. Actual data on any particular product or material may vary from those shown herein. TM is trademark of and ® is registered...

ATI 13-8™ Technical Data Sheet WELDING ATI 13-8™ alloy is normally welded using inert gas tungsten arc techniques, although most other welding processes may be used. These include plasma arc, electron beam, gas metal arc, and shielded metal arc processes. Helium is the preferred shielding gas. HOT WORKABILITY/FORMABILITY ATI 13-8™ alloy has good hot working characteristics, and can be hot worked over a wide temperature range. Temperatures up to 2200°F (1204°C) may be used. For optimum properties, intermediate and final hot working temperatures should not exceed 1900°F (1038°C). Hot working...