304L stainless steel is a versatile stainless steel material. 304L stainless steel grades: the old standard JB / T 4237-1992 correspond 00Cr19Ni10 new standard GB / T 20878-2007 stainless steel and heat-resistant steel grades and chemical composition and GB 24511 2009 02Cr19Ni10 corresponding pressure on the device with stainless steel sheet and strip, which contains Carbon is about 0.03% different from the unified digital code S30403 S30408 ??304 304L stainless steel chemical analysis of chemical composition% C: ≤0.03, Si: ≤1.0, Mn: ≤2.0, Cr: 18.0 ~ 20.0, Ni: 8.0 ~ 11.0, S: ≤0.03, P: ≤0.035; mechanical properties of the mechanical properties of 304L 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 specific heat c (20 ℃) ??0.502 J · (g · C) -1 thermal conductivity λ / W (m · ℃) -1 (following temperature / ℃ in) 20,100,500 12.1 16.3 21.4 linear expansion coefficient α / (10-6 / ℃) (between the following temperature / ℃) 20 ~ 100 20 ~ 200 20 ~ 300 20 ~ 400 16.0 16.8 17.5 18.1 resistivity of 0.73 Ω · mm2 · m-1 mp 1398 ~ 1420 ℃