A large range of stainless nuts and bolts and stainless steel fasteners are available from Anzor Fasteners, Brisbane for walk in trade sales or same day dispatch Australia wide. Grades 304 stainless steel and 316 stainless steel are available off the shelf with Duplex 2205 stainless steel and Super Duplex 2507 stainless steel made to order.
304 stainless steel is suitable as a general purpose grade. 316 stainless steel is recommended by the Australian Stainless Steel Development Association as a minimum within five kilometres of the surf or moderately corrosive environments. 2507 super duplex stainless steel is recommended by ASSDA for âcritical applicationsâ and salt water immersion.
Most stainless steel bolts are made to a minimum tensile strength of 700MPa (marked A2-70 or A4-70 on metric bolts), though some are made to 800 MPa tensile strength (marked A4-80 or Bumax 88) or 1000 MPa (Bumax 109). The strongest stainless steel bolt âoff the shelfâ is the Bumax 129 stainless steel bolts which are made to 1200 MPa tensile strength from Duplex 2205 stainless steel with a corrosion resistance PRE value > 34. See also stainless steel bolt strengths.
To prevent stainless steel from rusting:
If Stainless Steel is rusting or tea staining then Cleaning of stainless steel is best done with a stainless steel cleaner such as Action Gel. A rust remover such as has a Phosphoric Acid base and should be carefully handled with gloves and safety glasses.
All stainless steel bolts, threads and mating services should be lubricated with a Nickel or PTFE based lubricant for stainless to prevent stainless steel galling. Galling or cold-welding can occur when oxide film coated metals (like stainless steel) of similar hardnessâs are tightened without lubrication and bind at a molecular level.