Re: [MW:14301] Diff. between ER 70 S2 and ER 70 S-G

Hi

Refer table 4 i ASME Sec II Part C SFA 5018

this might help you

TABLE 4
IMPACT TEST REQUIREMENTS (AS WELDED)
AWS Classification Average Impact Strengtha,b (Minimum)
A5.18 A5.18M A5.18 A5.18M
ER70S-2 ER48S-2 20 ftWlbf at -20°F 27 J at -30°C
ER70S-3 ER48S-3 20 ftWlbf at 0°F 27 J at -20°C
ER70S-4 ER48S-4 Not Required Not Required
ER70S-6 ER48S-6 20 ftWlbf at -20°F 27 J at -30°C
ER70S-7 ER48S-7 20 ftWlbf at -20°F 27 J at -30°C
ER70S-G ER48S-G As agreed between supplier and purchaser
E70C-G(X) E48C-G(X) As agreed between supplier and purchaser
E70C-3X E48C-3X 20 ftWlbf at 0°F 27 J at -20°C
E70C-6X E48C-6X 20 ftWlbf at -20°F 27 J at -30°C
E70C-GS(X) E48C-GS(X) Not Required Not Required
NOTES:
a. Both the highest and lowest of the five test values obtained shall
be disregarded in computing the impact
strength. Two of the remaining three values shall equal or exceed 20
ftWlbf [27 J]; one of the three
remaining values may be lower than 20 ft-lbf [27 J], but not lower
than 15 ftWlbf [20 J]. The average
of the three shall not be less than the 20 ftWlbf [27 J] specified.
b. For classifications with the "N" (nuclear) designation, three
additional specimens shall be tested at room
temperature. Two of the three shall equal, or exceed, 75 ftWlbf [100
J], and the third shall not be lower
than 70 ftWlbf [95 J]. The average of the three shall equal, or
exceed, 75 ftWlbf [100 J].
3.3 The welding electrodes and rods classified under
this specification are intended for gas shielded arc welding,
but that is not to prohibit their use with any other process
(or any other shielding gas, or combination of shielding
gases) for which they are found suitable.
4. Acceptance
Acceptance5 of the electrodes and rods shall be in accordance
with the provisions of AWS A5.01.
5. Certification
By affixing the AWS specification and classification
designations to the packaging, or the classification to the
product, the manufacturer certifies that the product meets
the requirements of this specification.6
6. Rounding-Off Procedure
For the purpose of determining conformance with this
specification, an observed or calculated value shall be
rounded to the nearest 1000 psi [10 MPa] for tensile and
yield strength, and to the "nearest unit" in the last righthand
place of figures used in expressing the limiting value
for other quantities in accordance with the rounding-off
method given in ASTM E 29.
5 See Section A3, Acceptance (in Annex A) for further information
concerning acceptance, testing of the material shipped, and AWS A5.01.
6 See Section A4, Certification (in Annex A) for further information
concerning certification and the testing called for to meet this requirement.
422

regards
Samshuddin.K

On 5/18/12, LALIT VADADORIYA <lalit.vadadoriya@gmail.com> wrote:
> Dear sir,
>
>
> what is difference between ER 70 S2 and ER 70 S-G.
>
> --
> Regards
>
> *Lalit Vadadoriya
> Sr.Engineer (Inspection)
> Engineers India Limited*
> *Dahej Petrochemical Complex,*
> *Dahej (Gujarat)*
>
> --
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>

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