The American Standard High Temperature Nickel-Chromium Alloy Cast Steel (HTCS) has a variety of grades and types that are used in a wide range of applications in industries such as power generation, oil and gas, and chemical processing. The grades and types differ in their mechanical and chemical properties. Depending on the type and grade, these steels can have different strengths, hardness, ductility, and weldability. HTCS also has excellent oxidation and creep resistance.
The most common grade and type of HTCS is Grade ASTM A-297 (UNS N10002) and Type 301. ASTM A-297 is a heat-resistant and corrosion-resistant austenitic stainless steel. It has a nominal composition of 18-20% chromium and 8-10.5% nickel and contains elements like molybdenum, nitrogen, and silicon. The chromium content gives the steel its corrosion resistance and durability, while the nickel content provides further protection from oxidation. Type 301 is the annealed, cold-rolled condition of ASTM A-297 which has excellent draws and formability.
Other common grades and types of HTCS are Grade ASTM A532 (UNS N12160) and Type 410. ASTM A532 is a martensitic stainless steel with higher chromium and molybdenum content than ASTM A-297. It has a nominal composition of 15-17% chromium, 12-14% nickel, 1.25% molybdenum, and 0.6-1.2% silicon, and it contains other elements such as nitrogen, phosphorus, and sulfur. The higher chromium and molybdenum content gives this steel increased strength and hardness and improved corrosion and wear resistance, while the nickel content provides resistance to oxidation. type 410 is the annealed, cold-rolled condition of ASTM A532 with excellent draws, forms, and cutting properties.
Grade ASTM A-494 (UNS N10368) and Type 304 are also common grades and types of HTCS. ASTM A-494 has a nominal composition of 18-20% chromium and 8-10.5% nickel and contains elements like molybdenum, nitrogen, and silicon. It is similar to ASTM A-297, but with higher levels of molybdenum and other elements. Type 304 is the annealed, cold-rolled condition of ASTM A-494 which has excellent draws and formability.
HTCS can also be produced in a variety of other grades and types such as Grade ASTM A-209 (UNS N08367) and Type 316. ASTM A-209 is an austenitic stainless steel with a composition of 18-20% chromium, 8-10.5% nickel, and 2-3.5% molybdenum. It contains other elements such as nitrogen, sulfur, and silicon. The high chromium and molybdenum content give this steel good strength and hardness and excellent corrosion and wear resistance. Type 316 is the annealed, cold-rolled condition of ASTM A-209 which has good draws and forms and cutting properties.
Overall, HTCS is a versatile material that can be used in a variety of applications. It has excellent mechanical and chemical properties which make it suitable for different industries. Furthermore, the different grades and types of HTCS provide a wide range of options depending on the application and environment.
