[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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