Product Description and Process
ASTM A297 high silicon cast iron heat resistant cast iron castings supplier
Production process: green sand molding
Surface treatment process: paint coating
Product Material and Uses
Normally produce with RTCr, RTCr2, RTCr16, RTSi5, RTQSi4, RTQSi5, etc.
The heat resistant cast iron casting products are widely used for furnace grate, roasting furnace components, boiler parts, kiln gate, sintering machine fittings, etc.
Development of a Heat Resistant Cast Iron Alloy for Engine Exhaust Manifolds
A new heat-resistant cast iron alloy has been developed for the exhaust manifolds of new passenger-car diesel engines. This development occurred because operating demands on exhaust manifolds have increased significantly over the past decade. These demands are due to higher exhaust gas temperatures resulting from tighter emission requirements, improved fuel efficiencies, and designs for higher specific engine power. These factors have led to much higher elevated temperature strength and oxidation resistance requirements on exhaust manifold alloys. Additionally, thermal fatigue that occurs directly as a result of thermal expansions and mechanical constraint has become an increasingly important issue. The research detailed in this paper focused on the optimization of the chemical composition of a Si-Mo ductile iron to improve the mechanical and physical properties for use in an engine exhaust manifold. Low cycle fatigue and high temperature oxidation properties were evaluated and found to yield an improved alloy for exhaust manifold applications.
High Si ductile cast iron (High-Si FCD) is a heat resistant cast iron developed for automobile exhaust manifold. High-Si FCD is a low-cost material with long thermal fatigue life and high oxidation resistance. The Mg/P ratio is controlled to be less than 1.5 and Mo is added to increase high-temperature strength. The alloys studied are conventional high-Si FCD (alloy C) and developed alloys (D1 and D2). Endurance time obtained by the engine bench test is considered to be a function of various factors including tensile strength and oxidation resistance.