As a Malleable Iron Pipe Fittings Supplier, today we will continue to introduce you about the Malleable Cast Iron.
Use of the malleable cast iron
A metal used in automobiles. After graphitization annealing, the graphite is mainly a group of flocculent, flocculent, and sometimes a small amount of globular cast iron. Malleable cast iron has higher strength, toughness and impact toughness than gray cast iron. Malleable cast iron can be divided into black core malleable cast iron, pearlite malleable cast iron, white core malleable cast iron and nodular malleable cast iron according to chemical composition, heat treatment process, performance and structure. At present, more than 90% malleable iron produced in China is black heart malleable iron. The other three types of malleable cast iron are rarely used. Black core malleable iron has low strength but good plasticity and toughness. Malleable cast iron is mainly used in automobile rear axle housing, steering mechanism, low pressure valve, pipe joint and other parts affected by shock and vibration.
Performance of the malleable cast iron
White iron has poor machining performance, but after high temperature tempering, it has high strength and plasticity, and can be machined.
As the graphite in malleable cast iron is a group of flocculent and has little effect on the cutting of the matrix, its mechanical properties are higher than that of gray cast iron, and its plasticity and toughness are better. However, malleable cast iron cannot be forged. Malleable cast iron has different matrix structure and properties. Black core malleable cast iron has higher plasticity and toughness, while pearlite malleable cast iron has higher strength, hardness and abrasion resistance.
Brand and purpose of the malleable cast iron
Symbol representation method
The marks of malleable cast iron are indicated by the percentage of the minimum tensile strength (MPa) and the minimum elongation after break of "KTH" (" ketie hei ") or "KTZ" (" ketie hei "). For example, brand KTH 350-10 means black malleable iron with the minimum tensile strength of 350 MPa and the minimum elongation after fracture of 10%, that is, ferritic malleable iron. KTZ 650-02 represents malleable pearlite cast iron with minimum tensile strength of 650 MPa and minimum elongation after fracture of 2%.
Common malleable cast iron
Brand, performance and use (GB 9440 -- 1988)
Cast iron brand kth300-06, kth330-08, kth350-10, kth370-12: used for manufacturing pipe fittings, low-pressure valves, rear axle housing of automobile tractors, steering mechanism, machine tool parts, etc.
Cast iron brand ktz450-06, ktz550-04, ktz650-02, ktz700-02: castings with high manufacturing strength and good abrasion resistance, such as gearbox, camshaft, crankshaft, connecting rod, piston ring, etc
Castings ktb380-04, ktb380-12, ktb400-05, ktb450-07: white heart malleable iron, which is only used for thin wall castings and castings without heat treatment after welding.
Well, that's all for the sharing, thanks for your reading, and we also supply Malleable Iron Pipe Nipples for sale, if you have any demand for our products, just feel free to contact us.
