Welding Compatibility
Welding Compatibility
(OP)
PLease advise the compatibility of welding different material as follows:
1)ASTM A694 Gr. F65
2)ASTM A860 Gr. F65
3)ASTM A234 Gr. WPB
4)ASTM A105
Can this material be welded?
What is the different between ASTM A694 and A860, which material is better for high strength fittings? Please advise.
1)ASTM A694 Gr. F65
2)ASTM A860 Gr. F65
3)ASTM A234 Gr. WPB
4)ASTM A105
Can this material be welded?
What is the different between ASTM A694 and A860, which material is better for high strength fittings? Please advise.





RE: Welding Compatibility
RE: Welding Compatibility
I want to know if this material can be welded between each others.
RE: Welding Compatibility
ASTM A 694 Grade F65 per the ASTM specification is for carbon and low alloy steel pipe flanges, fittings, valves and parts for high pressure transmission service. According to part 6.2, the steels specified by grade (strength) shall be within chemical composition limits in Table 2 (0.26% C max, 1.40% Mn, max, P and S, 0.025% max and Si .15-.35%) to ensure weldability.
ASTM A 860 Grade WPHY65 per the ASTM specification is for wrought high strength low alloy steel butt welding fittings for high pressure transmission service. The carbon equivalent is limited to 0.45 by specification.
The material supplied under both specifications are considered weldable and compatible for joining to each other and to material supplied under SA 234 WCB and SA 105 specifications with a 70 ksi filler material - low hydrogen (H4) electrode. I would strongly suggest you follow ASME Section VIII, Div 1 requirements for welding preheat and post weld heat treatment.
The ASTM A 860 specification, versus the A694 specification, is probably the better for high strength fittings because it provides for the use of low (micro) alloy steels - the carbon max is limited to 0.20% but other alloy elements are permitted to assure the carbon equivalent remains below 0.45 for weldability.
RE: Welding Compatibility
RE: Welding Compatibility
One earlier post talked about PWHT, remember to ensure that the PWHT temperature is less than the tempering temperature as the first two grades would be Q&T steels.
Thanks and regards
Sayee Prasad R
Ph: 0097143968906
Mob: 00971507682668
email: sayee_prasad@yahoo.com
If it moves, train it...if it doesn't move, calibrate it...if it isn't written down, it never happened!
RE: Welding Compatibility
Regards,
Alipudin