316 stainless steel, 18Cr-12Ni-2.5Mo by adding Mo, so the corrosion resistance, resistance to atmospheric corrosion and high temperature strength are particularly good, in the harshness of the conditions; hardening of excellent (non-magnetic). Sea water equipment, chemicals, dyes, paper, oxalic acid, fertilizer and other production equipment; photography, food industry, coastal facilities, rope, CD bar, bolt, nut. 316 stainless steel chemical composition: C ≤ 0.08, Si ≤ 1.00, Mn ≤ 2.00, P ≤ 0.035, S ≤ 0.03, Ni :10.0-14 .0, Cr :16.0-18 .5, Mo :2.0-3 .0. 316 stainless steel mechanical properties, tensile strength (Mpa) 620 MIN, yield strength (Mpa) 310 MIN, elongation (%) 30 MIN, area reduction (%) 40 MIN, 316 stainless steel density of 8.03 g/cm3, austenitic stainless steel is generally used this value .

Ferritic stainless steel of its internal microstructure of ferrite, the chromium mass fraction 11.5% 32.0% range. As the chromium content increased, the acid resistance also increased, by adding molybdenum (Mo), the acid can improve the corrosion resistance and resistance to stress corrosion. Stainless steel grades such national standards have 00Cr12, 1Cr17, 00Cr17Mo, 00Cr30Mo2 and so on.

Martensitic stainless steel which is martensite microstructure. Such mass fraction of chromium in steel by 11.5% to 18.0%, but the mass fraction of carbon up to 0.6%. Carbon content increased, the increased strength and hardness of steel. In such a small amount of nickel added steel can promote the generation of martensite, while improving its corrosion resistance. Poor welding of such steel. Included in the national standards for grades of steel have 1Cr13, 2 Cr13, 3 Cr13, 1 Cr17Ni2 and so on