301 stainless steel chemical composition of 301 stainless steel grades 1Cr17Ni7.
Composition% C: ≤ 0.15, Si: ≤ 1.0, Mn: ≤ 2.0, Cr: 16.0 ~ 18.0, Ni :6.0-8 .0, S: ≤ 0.03, P: ≤ 0.045

301 stainless steel performance
301 stainless steel yield strength (N/mm2) ≥ 205 ≥ 520 Tensile Elongation (%) ≥ 40 Hardness HB ≤ 187 HRB ≤ 90 HV ≤ 200 density of 7.93 g · cm-3 the specific heat c (20 ℃) ​​0.502 J · (g · C) -1 thermal conductivity λ / W (m · ℃) -1 (in the following temperature / ℃)
20 100 500 12.1 16.3 21.4 Linear expansion coefficient α / (10-6 / ℃) (in the following temperature between / ℃) 20 ~ 100 20 ~ 200 20 ~ 300 20 ~ 400 16.0 16.8 17.5 18.1 resistivity of 0.73 Ω · mm2 · m melting point of 1398 ~ 1420 ℃ -1

● Mechanical Properties: Tensile strength σb (MPa): ≥ 520 conditions, yield strength σ0.2 (MPa): ≥ 205 Elongation δ5 (%): ≥ 40 Reduction of area ψ (%): ≥ 60 Hardness: ≤ 187HB ; ≤ 90HRB; ≤ 200HV
● Heat treatment and microstructure specifications: standard heat treatment: solution 1010 ~ 1150 ℃ fast-cooling. Microstructure: Organizing for the austenitic type. In the air or chemical corrosion medium corrosion resistant to a high alloy steel, stainless steel is a beautiful surface and good corrosion resistance, without going through the plated surface treatment, and play inherent in the surface properties of stainless steel, for use in multi-areas of steel, often referred to as stainless steel. Representative of the performance of 13 chrome,18-8 chrome-nickel steel, high alloy steel. From the metallographic point of view, because leaving the surface of stainless steel containing chromium chromium thin film, the film within the invasive isolate oxygen and steel from corrosion effect. In order to maintain the inherent corrosion resistance of stainless steel, steel must contain more than 12% chromium.