Marking of Iron

Iron is marked by the letters MF and ...

Marking of Iron


Iron is marked with the letters and numbers, midrange, the first of which characterizes the strength of this brand of cast iron in tension, the second - at a bend (kg / mm 2 ). The most widely used brands of cast iron: SCH12-28; SCH15-32-36 SCH18, SCH 21-40, 24-44 MF, MF 28-48, 32-52 MF, MF 38-60, with the top five brands are perlite- ferritic base metal, the last three - pearlite. The strength of gray cast iron of all grades in compression is much higher than the tensile strength. For example, a cast iron SCh 24-44, having a tensile strength of 24 kgf / mm 2 , the compressive strength of 85 kgf / mm 2 . To increase the strength of cast iron with graphite inclusion gives a spherical shape by the introduction of magnesium into the ladle before pouring. In this cast, and takes some flexibility. High-strength cast iron mark the letters and numbers, HF, the first of which describes the temporary resistance of cast iron in tension (kgf/mm2), the second - elongation (%). For example, HF or HF 60-2 40-10.

Ductile iron mark the letters and numbers, CN, marking the time when the resistance tension (kgf/mm2) and elongation (%). Examples of brands of cast iron can serve as a CN 38-8; CN 35-10, CN 37-12, CN 06.30 with ferritic steel base and the CN 45-6, 50-4, and CN CN 60-3 having a ferrite-pearlite base .

In this part of the structure of iron is largely dependent on the cooling rate.

In this part of iron, such as the constancy of the total content of carbon and silicon, as well as other elements in its composition, can be hardened, and the pearlite-ferritic iron.

See also:
Welding of Cast Iron
Composition and Properties of Iron
Marking of Iron
Basic Information on Weldability and Technological Advice
Structural Transformations in the Heat Affected Zone during Welding of Cast Iron
Effect of Cooling Rate on the Structure of the Weld Metal and Heat Affected Zone
The Technological Process of Hot Welding
Cold Welding of Cast Iron with Simple Electrodes
Cold Welding Electrodes, Cast Iron, Providing the Receipt of the Weld Metal Color