Malleable Iron Pipe Fittings Of Various Shapes Have Become Indispensable To Human Society

Nov 10, 2023 | NEWS

Malleable cast iron is a kind of high strength cast iron obtained from white cast iron by annealing treatment. It has high strength, plasticity and impact toughness, and can partially replace carbon steel. According to different annealing methods, this kind of cast iron has two types: black core and white-core. Black malleable cast iron is obtained by graphitization annealing. White malleable cast iron is prepared by oxidation decarburization annealing.

Black  malleable cast iron has a certain impact and good strength, suitable for bearing medium or static load working parts. Black  malleable cast iron has high toughness and good comprehensive performance. The white core malleable cast iron has a silver-white section, a thick decarbonized layer on the outer edge, and an uneven structure inside and outside. White core malleable cast iron pipe connector has good mechanical properties and weldability, so the market demand is large. However, white  malleable cast iron is difficult to manufacture, high manufacturing cost, and the current technology is not mature. Therefore, black  malleable iron still occupies a dominant position in the market.

Black malleable iron has good performance, high economic benefit, and is widely used in the pipeline industry. It is an important raw material for YINUO China’s production of various pipeline fittings.1/2 inch black pipe malleable iron fitting is one of YINUO,China’s best seller.


Benefits of malleable iron black pipe fittings

Malleable black cast iron, cast iron from a certain chemical composition of liquid iron poured into a white blank, and then annealed cast iron, has high strength, plasticity and impact toughness, can partially replace carbon steel.Malleable iron black pipe fittings have the following advantages:

  • Has a high strength, σb300 ~ 375MPa;
  • It has high plasticity and elongation of 6 ~ 12%.
  • With high toughness, the impact toughness of unnotched samples can reach 100 ~ 137KJ/m3;
  • Excellent heat resistance;
  • Excellent atmospheric corrosion resistance;
  • Excellent damping performance;
  • Compared with ductile iron, the quality is stable.
  • Easy to organize assembly line production;
  • It has good machining performance.

Different shapes of pipe fittings for different usage

The pipeline system includes pipes of different sizes. In order to connect various pipes according to the required structure, beside material,pipe fittings are also made into various shapes. Here are the examples YINUO,China bring to buyers:


The malleable iron black elbow is used more than any other pipe fittings. It provides flexibility to change the pipe direction. Elbow is mainly available in two standard types 90° and 45°. However, it Can be cut to any other degree. Elbows are available in two radius types, Short radius (1D) and Long Radius.


Tees are used to distribute or collect fluid from running pipes. It is a short tube with a 90-degree branch in the center. Two types of tees are used in the pipeline: equal/straight tee and reduced/reduced tee.

In Malleable Iron Gas Reudce Elbow Pipe Fittings, the diameter of the branch size is smaller than the diameter of the Run (Header) Pipe.


Cross is also called four-way pipe fitting. Four passes have one entrance and three exits (and vice versa). Generally, four passes are not used in process pipes to transport fluids. But forged crosses are common in fire sprinkler lines.

Piping Union

In low-pressure, small-bore pipes where pipes need to be disassembled more frequently, use an union to connecting with nonans as flanges. The union can be a threaded end or a socket weld end. The union consists of three parts: nut, female end and male end. When the female and male ends are connected, the nut provides the necessary pressure to seal the joint.