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Detailed Explanation Of 0Cr16Ni5Mo Low Carbon Martensitic Stainless Steel

Mar 18, 2021

0Cr16Ni5Mo belongs to low-carbon martensitic stainless steel, which is mainly used for wear-resistant parts in hydropower facilities, such as turbine blades, turbine rotating washers, and ship lift sliding track pads. During operation, it not only has to experience the invasion of general corrosive media, but also the combined effects of erosion and cavitation of sediment, and the use conditions are relatively harsh. These key components should have good corrosion resistance, high strength and high hardness to achieve Good wear resistance; it should have excellent impact toughness to resist the huge impact force formed during the formation and annihilation of cavitation in the deep water area.

Compared with the commonly used low-carbon martensitic stainless steels 0Cr13Ni5Mo, 17-4PH, 0Cr16Ni5Mo has higher strength, hardness, cavitation resistance, and also maintains better toughness and plasticity and underwater fatigue resistance, and also has better Solderability. However, since 0Cr16Ni5Mo has a dual-phase structure of austenite and ferrite at high temperature, the high-temperature plasticity is poor, resulting in edge cracks during hot rolling. The ratio of δ-ferrite is 15% and a more satisfactory processing plasticity can be obtained. As the ratio continues to increase, the high-temperature plasticity of steel plummets. In addition, changes in the tempering process will have a great impact on the microstructure and properties of low-carbon martensitic stainless steel.

Therefore, delta ferrite control and tempering process formulation are the key to producing high-quality 0Cr16Ni5Mo.

German standard DIN: 1.4418, 1.4419

European EN: X4CrNiMo16-5-1

1.4418 chemical composition:

Carbon C: ≤ 0.06

Silicon Si: ≤ 0.7

Manganese Mn: ≤ 1.5

Phosphorus: ≤ 0.04

Sulfur S: ≤ 0.03

Chrome C: 15~17

Nickel Ni4.0~6.0

Molybdenum 0.8~1.5