Indian Traders corporation
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Indian Traders corporation
Indian Traders corporation
Choice of material
   
"STAINLESS" steel contains a great number of variants, all with at least 12% chromium (Cr) and mostly also other alloying elements, nickel (Ni) and molybdenum (Mo) being the most important.

Chemical Composition :- Below is the table of chemical composition for different stainless steel grades in accordance with ISO 3506-1:1997.

                    

For austenitic stainless steels having a maximum carbon content of 0.03%. nitrogen may be present to a maximum of 0.22%.

At the discretion of the manufacturer the carbon content may be higher where required to obtain the specified mechanical properties at larger diameters, but shall not exceed 0.12% for austenitic steels.



Magnetic Properties :- Austenitic stainless steel fasteners are normally non-magnetic. The right choice of steel type will limit the permeability (that is the rate of penetration in a magnetic field) to below 1.05 G/Oe. However after cold working some ability to be magnetized may be evident.

Mechanical Properties of Bolts, Screws and Studs for Different Stainless Steel Grades in accordance with 1503506-1:1997 are given below.

                    

1) The tensile stress is calculated on the stress area (see annex A).
2) To be determined according to 6.2.4 on the actual screw length and not on a prepared test piece; d is the nominal thread diameter.
3) For fasteners with nominal thread diameters d > 24mm the mechanical properties shall be agreed upon between user and manufacturer and marked with grade and property class according to th s table.



Mechanical Properties of Nuts for Different Stainless Steel Grades in accordance with ISO 3506-2:1997 are given below.

                
1) For fasteners with nominal thread diameters d > 24 mm the mechanical properties shall be agreed upon between user and manufacturer and marked with grade and property class according to this table.
 
     
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