Which Grade of Stainless Steel Should I Choose for my Fastener?

Which grade of STAINLESS STEEL should I choose for my fastener? ΤΥΡΕ OF STAINLESS FEATURES/ USEFUL FOR IN ACTION STAINLESS GRADE BENEFITS A general purpose grade. It is commonly used because it A variety of applications, including interior, and non- coastal exterior, or coastal ex- 304 offers reasonable corrosion resistance, and is reasonably priced. xterior applications which are hidden from sight (as may tea- stain). Sometimes referred to as the Boat and marine applications, 316 'marine grade' because of its and exterior use near the coast excellent corrosion resistance (within 5km). (better than 304). Austenitic A 316 grade with extra Molybdenum added. Usually Bumax made to high strength classes Where high strength and excellent corrosion resistance 80 and 100 and has excellent is required. corrosion resistance. Furnaces and locations of 310 Used for high-temperature applications. extreme heat. Self Drilling (into metal) screws in non-coastal and less corrosive environments (e.g. interior use). 410 A Martensitic grade that can be hardened by heat treatment. 420 A nickel-free carbon. It is stronger than ade with high Spring Pins in less corrosive Martensitic environments. 410. A Martensitic alloy like 410 so can be hardened with heat Hardtec treatment, but has Molybde- num added and so offers Self Drilling (into metal) screws. much better corrosion resis- tance (similar to 304 grade). 2205 Duplex Stainless Steel - high strength properties and high Situations requiring high strength and corrosion corrosion resistance. resistance - such as Keel Bolts. Duplex 2507 Super Duplex Stainless Steel - high strength properties and extremely high corrosion re- Situations requiring high strength and very high corrosion resistance such as sistance. constant salt water immersion. Chromium-copper precipitation hardening Precipitation 17-4PH stainless steel used for High strength applications. Hardened applications requiring high strength and a moderate level of corrosion resistance. WARNING! BEWARE OF LOW NICKEL STAINLESS STEEL SOME STAINLESS ALLOYS WITH LITTLE OR NO NICKEL, SUCH AS GRADE 201, HAVE FOUND THEIR WAY ONTO WORLD MARKETS AND ARE BEING SOLD AS 304 OR 316 – THEY MAY EVEN BE STAMPED AS SUCH. THESE ALLOYS ARE NOT SUITABLE FOR AUSTRALIA'S OR NEW ZEALAND'S HARSH CONDITIONS - ESPECIALLY COASTAL ENVIRONMENTS. THIS INFORMATION IS PROVIDED AS A GUIDE ONLY AND ANZOR DOES NOT ACCEPT LIABILITY FOR THE APPLICATION OF THIS INFORMATION. SPECIFIC ADVICE ON GRADE SELECTION FOR CRITICAL APPLICATIONS SHOULD BE SOUGHT FROM www.ASSDA.ASN.AU OR WWW.CORROSIONCONTROL.CO.NZ . lanzor REFERENCES HTTP://Www.ASSDA.ASN.AU/TYPES-OF-STAINLESS-STEEL HTTP://www.BSSA.ORG.UK/TOPICS.PHP?ARTICLE=668&FEATURED=1 HTTP://www.ICDACR.COM/INDEX.PHP?OPTION=COM CONTENT&VIEW=ARTCLE&ID=137&ITEMID=343&LANG=EN HTTP://Www.SSINA.COM/OVERVIEW/FEATURES.HTML specialists in stainless fasteners HTTP://www.WORLDSTAINLESS.ORG/WHAT_IS_STAINLESS_STEEL/INTRODUCTION_TO_STAINLESS_STEEL Which grade of STAINLESS STEEL should I choose for my fastener? ΤΥΡΕ OF STAINLESS FEATURES/ USEFUL FOR IN ACTION STAINLESS GRADE BENEFITS A general purpose grade. It is commonly used because it A variety of applications, including interior, and non- coastal exterior, or coastal ex- 304 offers reasonable corrosion resistance, and is reasonably priced. xterior applications which are hidden from sight (as may tea- stain). Sometimes referred to as the Boat and marine applications, 316 'marine grade' because of its and exterior use near the coast excellent corrosion resistance (within 5km). (better than 304). Austenitic A 316 grade with extra Molybdenum added. Usually Bumax made to high strength classes Where high strength and excellent corrosion resistance 80 and 100 and has excellent is required. corrosion resistance. Furnaces and locations of 310 Used for high-temperature applications. extreme heat. Self Drilling (into metal) screws in non-coastal and less corrosive environments (e.g. interior use). 410 A Martensitic grade that can be hardened by heat treatment. 420 A nickel-free carbon. It is stronger than ade with high Spring Pins in less corrosive Martensitic environments. 410. A Martensitic alloy like 410 so can be hardened with heat Hardtec treatment, but has Molybde- num added and so offers Self Drilling (into metal) screws. much better corrosion resis- tance (similar to 304 grade). 2205 Duplex Stainless Steel - high strength properties and high Situations requiring high strength and corrosion corrosion resistance. resistance - such as Keel Bolts. Duplex 2507 Super Duplex Stainless Steel - high strength properties and extremely high corrosion re- Situations requiring high strength and very high corrosion resistance such as sistance. constant salt water immersion. Chromium-copper precipitation hardening Precipitation 17-4PH stainless steel used for High strength applications. Hardened applications requiring high strength and a moderate level of corrosion resistance. WARNING! BEWARE OF LOW NICKEL STAINLESS STEEL SOME STAINLESS ALLOYS WITH LITTLE OR NO NICKEL, SUCH AS GRADE 201, HAVE FOUND THEIR WAY ONTO WORLD MARKETS AND ARE BEING SOLD AS 304 OR 316 – THEY MAY EVEN BE STAMPED AS SUCH. THESE ALLOYS ARE NOT SUITABLE FOR AUSTRALIA'S OR NEW ZEALAND'S HARSH CONDITIONS - ESPECIALLY COASTAL ENVIRONMENTS. THIS INFORMATION IS PROVIDED AS A GUIDE ONLY AND ANZOR DOES NOT ACCEPT LIABILITY FOR THE APPLICATION OF THIS INFORMATION. SPECIFIC ADVICE ON GRADE SELECTION FOR CRITICAL APPLICATIONS SHOULD BE SOUGHT FROM www.ASSDA.ASN.AU OR WWW.CORROSIONCONTROL.CO.NZ . lanzor REFERENCES HTTP://Www.ASSDA.ASN.AU/TYPES-OF-STAINLESS-STEEL HTTP://www.BSSA.ORG.UK/TOPICS.PHP?ARTICLE=668&FEATURED=1 HTTP://www.ICDACR.COM/INDEX.PHP?OPTION=COM CONTENT&VIEW=ARTCLE&ID=137&ITEMID=343&LANG=EN HTTP://Www.SSINA.COM/OVERVIEW/FEATURES.HTML specialists in stainless fasteners HTTP://www.WORLDSTAINLESS.ORG/WHAT_IS_STAINLESS_STEEL/INTRODUCTION_TO_STAINLESS_STEEL