1, chemical composition difference: 315 stainless steel is a chromium-nickel-molybdenum stainless steel, the chemical composition includes about 16-18% chromium, about 10-14% nickel and about 2-3% molybdenum. 316 stainless steel is also a chromium-nickel-molybdenum stainless steel, the chemical composition includes about 16-18% chromium, about 10-14% nickel and about 2-3% molybdenum, and also contain about 2-3% vanadium.
2, the difference in application areas: 315 stainless steel used in corrosive environments, chemical industry, pharmaceutical industry, food processing, etc. 316 stainless steel excellent corrosion resistance, more suitable for marine environments, chemical equipment, seawater treatment equipment, medical equipment, and other demanding areas.