[MW:25120] Re: 16160] Difference between IS 1367 Gr. 4.6, 8.8 & 10.9

Hello, This information is very usefull.

Currently I have a requirement to produce M8 --8.8 grade Bolt. 

Can I select material C40 for the same.

Ajith

On Friday, December 7, 2012 at 5:15:19 PM UTC+5:30, scb wrote:

Mr.Bhaskar,

 

This is fastener standard for bolts

Grade 8.8 means , Approx. 800 MPa TS and 640 MPa yield strength(  you will arrive at the YS by multiplying the both the numbers times 10. That is 8x8x10=640)

Similarly  , 10.9 means  approx.1000 MPa  TS and 900 MPa yield strength. I have given below the exact details.

 

 

Property Class	Tensile strength,Mpa	Hardness	Material	heat treatment	tempering
4.6	400	B67-B87	low or medium carbon steel witth max limits for C 0.55, P0.048, S0.058	no
4.8	420	B71-B87
5.8	520	B82-B95
8.8	830	C23-C34	medium carbon steel with max limits for C0.28- 0.55, P0.048, S0.058	oil quenched	min 425 deg C
9.8	900	C27-C36			min 410 deg C
10.9	1040	C33-C39			min425  deg C
12.9	1220	C38-C44	medium carbon steel with max limits for C0.31- 0.65, P 0.045 MAX, S 0.045MAX	oil quenched	min 380deg C

 

I hope this will clarify your point. If any questions please don't hesitate to write.

 

Regards,

 

S C Balawat.

From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of v baskar
Sent: Friday, December 07, 2012 3:01 PM
To: material...@googlegroups.com
Subject: [MW:16160] Difference between IS 1367 Gr. 4.6, 8.8 & 10.9

 

Dear Members,

 

I would like to know difference between IS 1367 Gr. 4.6, 8.8 & 10.9

What does "4.6", 8.8 and "10.9" means....... 

 

Thankyou

 

V. B.

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