Material

Corrosion resistance comparison of beryllium copper and stainless steel

Corrosion Resistance Comparison Of Beryllium Copper And Stainless Steel

Corrosion Resistance Comparison Of Beryllium Copper And Stainless SteelCorrosion Resistance Comparison Of Beryllium Copper And Stainless Steel

There is no comparable, there are hundreds of stainless steel grades, depending on which one

Beryllium copper is a copper alloy with beryllium as the main alloying element, also known as beryllium bronze. It is a high-grade elastic material with the best performance among copper alloys. It has high strength, elasticity, hardness, fatigue strength, small elastic hysteresis, corrosion resistance, abrasion resistance, cold resistance, high conductivity, non-magnetic, non-sparking on impact, etc A series of excellent physical, chemical and mechanical properties.

Beryllium copper is an alloy with good comprehensive mechanical, physical and chemical properties. After quenching and tempering, it has high strength, elasticity, wear resistance, fatigue resistance and heat resistance. At the same time, beryllium copper also has high electrical conductivity. Resistance, thermal conductivity, cold resistance and non-magnetic, no spark when hit, easy to weld and braze, excellent corrosion resistance in the atmosphere, fresh water and sea water. Corrosion resistance of beryllium copper alloy in seawater: (1.1-1.4) × 10-2mm / year.

Corrosion depth: (10.9-13.8) × 10-3mm / year. After corrosion, there is no change in strength and elongation, so it can be maintained in seawater for more than 40 years. It is an irreplaceable material for submarine cable repeater structures. In the sulfuric acid medium: the annual corrosion depth in sulfuric acid (room temperature) less than 80% concentration is 0.0012-0.1175mm, and the corrosion is slightly accelerated if the concentration is more than 80%. The corrosion resistance of stainless steel decreases with the increase of carbon content. Therefore, the carbon content of most stainless steels is low, the maximum does not exceed 1.2%, and the Wc (carbon content) of some steels is even lower than 0.03% (such as 00Cr12). ). The main alloying element in stainless steel is Cr (chrome), and the steel has corrosion resistance only when the Cr content reaches a certain value. Therefore, stainless steel generally has a Cr (chrome) content of at least 10.5%. Stainless steel also contains elements such as Ni, Ti, Mn, N, Nb, Mo, and Si.

General item Beryllium copper alloy combines excellent mechanical properties, physical properties and chemical properties. After heat treatment (solution treatment and aging treatment), it has high strength limit, elastic limit, yield limit and fatigue resistance equivalent to special steel. At the same time, it has high electrical conductivity, thermal conductivity, high hardness, corrosion resistance, wear resistance, good casting performance, non-magnetic and impact non-sparking characteristics, and is widely used in mold manufacturing, machinery, electronics and other industries.

Characteristic:

  1. The tensile strength, yield strength, and hardness are all moderate values, so it has good processability. You can choose to use it.
  2. High anti-annealing and anti-wear properties, and good thermal conductivity and electrical conductivity at the same time
  3. Excellent mechanical and physical properties, high resistance to annealing and excellent wear resistance
  4. High hardness and abrasion resistance, which can further extend the service life. 5. High annealing resistance, with very high thermal conductivity and electrical conductivity.

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