Re: [MW:16795] Effect of High amount of manganese in chemical composition

Kindly see the notes given below the table containig chemical
composition.i.e increase of mn upto 1.6 is permitted for decrease in
the carbon by............

On 2/17/13, Maulik Thakkar <mlkthakkar2@gmail.com> wrote:
> Dear sir,
>
> High amount of Mn makes steel more hardenable. You can not find the steel
> of between 2-10 % Mn in general....
>
> Regards,
> Maulik
> Welding engg & Metallurgy
> On Jan 29, 2013 4:37 PM, "Farhang" <hyperm2m@gmail.com> wrote:
>
>> Dear All****
>>
>> I have tested a specimen of A 516 Gr. 70+Normalized (thickness: 10mm) for
>> chemical analyze, impact, tensile & metallographic.****
>>
>> ** **Tensile & Impact were acceptable, but i have problem in chemical
>> analyze as follow:
>>
>> ****
>>
>> ü *Tensile Strength:*
>>
>> Fy: *360* Mpa UTS: *531 * Mpa****
>>
>> ** **ü *Impact Test:*
>>
>> absorbed energy in impact: *150 j* (sub size 7.5*10*55) – it was very
>> good****
>>
>> ** **ü *chemical analyze:*
>>
>> C:0.09/*Mn:1.534*/Si:0.35/P:0.005/S:0.005/Cr: 0.069/ Ni: 0.046/ Cu: 0.01
>> /Mo:0.013/ Cu: 0.104/ V:0.055 /W:0.0026 /Ti: 0.027 /AL:0.042/ Sn:0.001/1
>> Pb:0.0002/ As:0.002/ Sb:0.0023/ Zr:0.0015/ Nb:0.0475/ Ca: 0.0031****
>>
>> ** **But according to standard ASTM A516(attached) *Mn shall be
>> 0.79~1.30*but here
>> *Mn% is over. It was 1.53%* .
>>
>> ****
>>
>> ** **
>>
>> I need to know the effect of this discrepancy???
>>
>> ****
>>
>> Does it important?****
>>
>> Isn't carbon% very low????????****
>>
>> What is high amount of manganese could be causes????? ****
>>
>> ** **
>>
>> M. Farhang****
>>
>> **hyperm2m@gmail.com **
>>
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>
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--
Regards

sarfaraz

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