Carbon steel seamless pipe and stainless steel seamless pipes have the same basic composition of iron and carbon. The main difference between them is the alloy content. The alloy content of carbon steel is less than 10.5%, while the chromium content of stainless steel must be greater than or equal to 10.5%. This essential difference is what gives carbon steel and stainless steel seamless pipes their unique physical properties. Carbon steel and stainless steel seamless pipes are different, but it cannot be said which is stronger. Everything is related to the usage environment. Each material has advantages and disadvantages, and the key is to match the steel to the application.
(1) Advantages and disadvantages of carbon steel seamless pipes
Advantages: 1. Low price and easy smelting; 2. Good processing technology; 3. Improved performance (heat treatment).
Disadvantages: 1. Poor hardenability; 2. Low strength level and low yield ratio; 3. Poor tempering stability and poor heat resistance; 4. Not resistant to low temperature, carbon steel becomes brittle below the ductile-brittle transition temperature; 5. No Corrosion-resistant, carbon steel cannot resist the corrosion of the atmosphere, acid and alkali salts; 6. Low magnetic permeability, low magnetic permeability of carbon steel; 7. Non-magnetic, carbon steel will inevitably be magnetized in a magnetic field.
(2) Advantages and disadvantages of stainless steel seamless pipes
The main advantages of stainless steel are: corrosion resistance or relatively high temperature resistance, general acid resistance, and high temperature stainless steel with heat resistance and high temperature oxidation resistance (heat resistance and no skin).
Disadvantages of stainless steel: mainly high cost and expensive; in addition, stainless steel is not resistant to corrosion by alkaline media.