QT-PLUS® | QT-PLUS® Wear Steel  Superior to AR500 SteelJADCO QT-PLUS® wear steel, a company exclusive, combines a specific chemistry with a unique thermal heat-treating process. Result: a premium-quality grade of alloy steel unmatched in the industry, with up to 10 times the wear life of conventional mild steel. Parts made from QT-PLUS® not only provide outstanding resistance to abrasion (500 bhn) and wear, but are amazingly ductile. Individual Plates Available QT-PLUS® steel plates come in a variety of standard or cut-to-size dimensions. JADCO stocks plate in sizes from 1/4” up to 5” thick. Why Use QT-PLUS®?  Weldability QT-PLUS® wear steel exhibits excellent weldability because of a tightly controlled carbon range. Lower quality steels have carbon contents as high as 30% to 40%, resulting in poor weldability, formability and are susceptible to cracking. Toughness QT-PLUS® wear steel is extremely tough do to precise alloying, controlled carbon and proprietary heat treat. Steels of lesser quality typically have little or no alloy, and high carbon content, that reduce toughness. Through-Hardness QT-PLUS® wear steel chemical composition produces a material that retains hardness throughout the entire plate thickness. Commodity grade steels possess a lean chemistry and that does not allow for through-hardness resulting in excessive wear. Consistent Properties QT-PLUS® wear steel has uniform characteristics time after time EVERY TIME. With commodity grade steels, inconsistent heat treating practices creates “hard” and “soft” spots which hamper workability. Quality Parts QT-PLUS® wear steel is manufactured under the strictest quality standards always. With commodity grade steels, lack of consistent quality control results in plates that can have characteristics such as warping or waviness, making installations difficult and costly. Fabrication QT-PLUS® wear steel is a high quality, premium steel that can be easily fabricated. With commodity grade steels, forming, machining and welding are more difficult. Heavy Steel Fabrication Facts
Regardless of whether a QT-PLUS® application requires drilling, welding, flame cutting or bending, QT-PLUS® will yield outstanding results if you follow these helpful instructions.
Drilling: QT-PLUS® is inherently tougher to drill than T1 or AR400; using the proper methods, however, it is easily machined. Work stock should be as rigid as possible, and cobalt or sintered carbide bits provide the best tool life between dressings. A short shank, two-fluted bit with negative rake works best. A 135° to 150° tip angle with 6° edge clearance and 20 SFM works well. Welding: Rods should be dry-welded on a moisture-free surface. Pre-heating is preferred to reduce thermal shock (250° is a rule of thumb). Use E7018 or E8018 weld rod. If no pre-heat is possible, a 309 stainless rod is preferred. Welds in restraint should be avoided. Carbon equivalent = .667 Flame Cutting: QT-PLUS® is easily flame cut with oxyacetylene or plasma. Hardening will occur at the edge of the cut, and it’s beneficial to pre-heat before flame cutting (350°F) or allow enough stock to get below the hardened edge. Note: At JADCO, we burn with high-definition plasma, and the material is under water to decrease distortion of the heat-affected area. Bending: QT-PLUS® is cold-formable with the proper equipment. The material’s toughness enables it to be rolled or formed for almost any application up through 2” thick. We recommend 8T across the grain and 12T with the grain. For plate over 2” thick we recommend 12T transverse to the grain. Transverse to the grain is preferred. Typical Applications
QT-PLUS® is a versatile material that is ideal for many products, including:
Mechanical Information
QT-PLUS® has the mechanical properties necessary for the harshest environments.  Mechanical Properties: Hardness: Thickness <1″– 461/537 bhn Thickness >1″– 444/514 bhn Tensile (typical): 225,000 psi Elongation in 2″: 11% (typical) Charpy V: 25 ft/lbs @ 40°F (typical) Yield (typical): 165,000 Procedures 
QT-Plus® is cold formable with the proper equipment and material preparation. The material toughness allows it to be rolled or formed for almost any application. We recommend a minimum radius of 8T across the grain for plate thickness up to 2”. Please follow the outlined procedures to minimize cracking concerns.
» Plate must be bent in direction perpendicular to the grain.
» Grind corners of gas-cut edge 12" beyond bend area before bending. » Grind any notches off gas cut surface in area of bend. » Can pre-heat to 300F to improve formability....but not over 400F. » Use as wide a female die (throat) as possible. » Use as wide a male punch as possible. (3" radius rather than a 1" radius)
» Bump in several bends rather than one large one, however, take care to minimize the total number of hits.
» Look at outside radius surface before bending and grind out any gouges. Download Our Brochure
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