The chemical composition standard value of the material is NS337, its density, application, etc. Overview:
Grade: NS337
C(%): ≤0.03
Cr(%): 19.0~21.0
Ni(%): Margin
Mo(%): 15.0~17.0
Co(%): ≤0.10
Cu(%): ≤0.10
Al(%): -
Ti(%): -
Fe(%): ≤5.0
Si(%): ≤0.40
Mn(%): 0.50~1.50
P(%): ≤0.020
S(%): ≤0.020
other(%): -
NS337 chemical composition effect analysis:
1. Chromium (Cr): In structural steel and medium, chromium can significantly improve strength, hardness and wear resistance, but at the same time reduce plasticity and toughness. Chromium can also improve the oxidation resistance and corrosion resistance of steel, so it is an important alloying element of stainless steel and heat-resistant steel.
2. Nickel (Ni): Nickel can improve the strength of steel while maintaining good plasticity and toughness. Nickel has high corrosion resistance to acid and alkali, rust and heat resistance at high temperature. However, since nickel is a relatively scarce resource, other alloying elements should be used instead of nickel-chromium steel.
3. Molybdenum (Mo): Molybdenum can refine the grains of steel, improve hardenability and thermal strength, and maintain sufficient strength and creep resistance at high temperatures (stressed at high temperatures for a long time, deformation occurs, called creep). Molybdenum is added to structural steel to improve mechanical properties. The brittleness of alloy steel due to fire can also be suppressed. It can improve redness in tool steel.
4. Titanium (Ti): Titanium is a strong deoxidizer in steel. It can make the internal structure of steel dense, refine the grain force; reduce aging sensitivity and cold brittleness. Improve welding performance. Adding appropriate titanium to the chromium 18 nickel 9 austenitic stainless steel can avoid intergranular corrosion.
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