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Re: [MW:7201] Hardness of 410

By Materials & Welding
Harish,
 
Are you talking about SA 240 TP 410? Because TP 410 is hardnenable straight-Chromium grade stainless steel .i.e Martensitic stainless steel (P.No. 6). As per specification, the hardness shall be 217 HB max.
 
Anealing this alloy at 1500°F-1550°F (815-842°C) and soaking for one hour per inch of thickness and furnace cool to room temperature may produce a Brinell hardness of 150-192.
Refer this site it may be helpful http://www.sandmeyersteel.com/410.html
 
But TP 410S is non-hardnenable straight-Chromium grade stainless steel .i.e ferritic stainless steel (P.No. 7). As per specification, the hardness shall be 183HB max. The only difference between TP 410 and TP 410S is carbon content and nickel content.
 

 
On Sat, Sep 25, 2010 at 7:23 PM, Harish Kannepalli <harishkannepalli@gmail.com> wrote:
Dear Experts,
                     Can anybody guide me about decreasing the hardness of 410 material from 230HB to 190HB after machining, by heat treatment?

regards,
Harish.

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