316L stainless steel pipe is a kind of hollow round steel, which is widely used in petroleum, chemical industry, medical treatment, food, light industry, mechanical instrument and other industrial conveying pipes and mechanical structural parts. In addition, in the same bending, torsional strength, light weight, so also widely used in the manufacture of mechanical parts and engineering structures. It is also commonly used to produce all kinds of conventional weapons, barrels, shells and so on.
316L stainless steel Chemical composition
C ：≤0.030
Si： ≤1.00
Mn：≤2.00
S ： ≤0.030
P ： ≤0.045
Cr：16.00～18.00
Ni：10.00～14.00
Mo：2.00～3.00
Mechanical properties of 316L stainless steel
Tensile strength σb (MPa)：≥480
Conditional yield strength σ0.2 (MPa)：≥177
Elongation δ5 (%)：≥40
Reduction of area bits ψ (%)：≥60
Hardness: ≤187HB;≤90HRB;≤200HV
Density: 7.98g/cm3
Specific heat capacity ratio（20℃）：0.502J/(g*K)
The addition of aluminum, titanium, copper and molybdenum into 316L stainless steel seamless tube can promote the precipitation reaction and strengthen the steel. Austenitic stainless steel seamless tube often contains titanium and aluminum, forming nickel titanium and nickel aluminum precipitated phase, the effect of which is similar to that of nickel based superalloy precipitation strengthening. Copper, on the other hand, is a weak austenitic forming element. The precipitated phase with composition close to pure copper can be used to strengthen martensitic steel. Austenite forming elements are: Nickel, manganese, carbon, nitrogen, copper, cobalt.
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