4130 with SS E316L-17 Overlay without PWHT?
4130 with SS E316L-17 Overlay without PWHT?
(OP)
Hi Guys,
We are planning to qualify an Overlay welding procedure for:
AISI 4130
Forged Block cut to 1 inch thk. plate,
75 Ksi min. YS and 95 Ksi min. TS,
C 0.3%, Cr. 0.99%, Mn 0.52% and Mo 0.17%
with following Heat Treatment done by mill: Normalizing - 900 Deg. C, 9 hours, Quenching in Water - 880 Deg. C, 9.0 hours, Tempering - 665 Deg. C, 16 hours)
Overlay welding: SMAW Process using E316L-17 Electrodes (2.4mm and 3.2mm).
Keeping a min preheat temperature of 150 Deg. C and an interpass temperature of 200 Deg. C.
Heating the test coupon to 250-300 Deg. C for 30 mins. after welding and allowing it to cool slowly in wrapped condition. No other PWHT to be performed.
Do you think this Test Coupon will qualify the mechanical Testing? Any suggestions regarding these temperatures or controlling the Heat Inputs will be much appreciated.
We are planning to qualify an Overlay welding procedure for:
AISI 4130
Forged Block cut to 1 inch thk. plate,
75 Ksi min. YS and 95 Ksi min. TS,
C 0.3%, Cr. 0.99%, Mn 0.52% and Mo 0.17%
with following Heat Treatment done by mill: Normalizing - 900 Deg. C, 9 hours, Quenching in Water - 880 Deg. C, 9.0 hours, Tempering - 665 Deg. C, 16 hours)
Overlay welding: SMAW Process using E316L-17 Electrodes (2.4mm and 3.2mm).
Keeping a min preheat temperature of 150 Deg. C and an interpass temperature of 200 Deg. C.
Heating the test coupon to 250-300 Deg. C for 30 mins. after welding and allowing it to cool slowly in wrapped condition. No other PWHT to be performed.
Do you think this Test Coupon will qualify the mechanical Testing? Any suggestions regarding these temperatures or controlling the Heat Inputs will be much appreciated.





RE: 4130 with SS E316L-17 Overlay without PWHT?
You need to overlay first with E309MoL-16 - 2 passes
The remaining passes should be E316L-17
I would increase the preheat to 175 deg C minimum and the interpass to 250 deg C.
. OK
after welding and allowing it to cool slowly in wrapped condition. No other PWHT to be performed.
RE: 4130 with SS E316L-17 Overlay without PWHT?
Petrotrim Services
www.petrotrim.com
RE: 4130 with SS E316L-17 Overlay without PWHT?
RE: 4130 with SS E316L-17 Overlay without PWHT?
metengr - May I know the reason for the suggested Pre-heat and Interpass Temperatures?
Coming to your concern for Dilution, I consulted API 6A on that as well. It defines a chemical composition 3 mm above the base metal for overlay welding which is Ni 8% min, Cr 16% min, C 0.08% max. I have seen similar qualifications before in which Chemical Analysis passed this criteria. So, lets hope for the best.
RE: 4130 with SS E316L-17 Overlay without PWHT?
See section (6.5) 6.5.1.1.3 API-6A 20th ed.
Section that is over looked most of the time, 6.5.2.4
It is important to note that the weld and base metal HAZs contain residual stresses and may contain hard and brittle transformation products that have not been tempered by the heat of welding. If residual stress and hardness in these areas are not sufficiently reduced, the weldment will be susceptible to sulfide stress cracking and hydrogen embrittlement and will not meet NACE MR0175.
Petrotrim Services
www.petrotrim.com
RE: 4130 with SS E316L-17 Overlay without PWHT?
Yes, it is called past experience.
RE: 4130 with SS E316L-17 Overlay without PWHT?
Dear metengr, Hello/Good Morning,
I like that!!
Best Regards
Qalander(Chem)
RE: 4130 with SS E316L-17 Overlay without PWHT?
RE: 4130 with SS E316L-17 Overlay without PWHT?