Tuesday, March 15, 2011

RE: [MW:10376] bolts and nuts material

Dear Sir,
 
A2-70 is not A193 or A194.
A2 is ISO/DIN A2 standard for stainless steel fasteners. There are three typical property classes (strengths) for in the metric system: 50, 70, and 80. Thsese are class numbers for fasteners. The class equals the tensile strength divided by 10. The (-) shows the metric property of the fasteners. For example, a screw marked A2-70 is a 304 stainless steel screw with a 700 N/mm2 tensile strength. 
 
A193 is a standard spec for Alloy steel and stainless steel bolting for high tempearture
A194 is a standard spec for carbon and alloy steel nuts for bolts for high tempearture service
 
 
regards,
Elshan Feyzullayev.

Date: Mon, 14 Mar 2011 23:52:30 -0700
From: ahmedeissa16@yahoo.com
Subject: [MW:10355] bolts and nuts material
To: materials-welding@googlegroups.com

dear all
 
what is this material stamped on bolts and nuts mean ( A2-70 )   ????
 
Which code or standard??
 
it is not in A193 &A194
 
thanks


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