Class: ER630

AWS: A5.9

Conforms to Certification: AWS A5.9                    ASME SFA A5.9

Weld Process Used for Mig (GMAW) and Submerged Arc (SAW)

AWS Chemical Composition Requirements
C = 0.05 max
Cr = 16.0 – 16.75
Ni = 4.5 – 5.0
Mo = 0.75 max
Mn = 0.25 – 0.75
Si = 0.75 max
P = 0.03 max
S = 0.03 max
Cu = 3.25 – 4.00
Nb + Ta = 0.15 – 0.30

Available Sizes
Diameter X Spool Sizes	Diameter X Coil Sizes
.025 x 2#, 10#, 25#	1/16 x 60# & mill coil
.030 x 2#, 10#, 25#, 30#, 33#	5/64 x 60# & mill coil
.035 x 2#, 10#, 25#, 30#, 33#	3/32 x 60# & mill coil
.045 x 2#, 10#, 25#, 30#, 33#	1/8 x 60# & mill coil
1/16 x 10#, 25#, 30#, 33#	3/16 x 60# & mill coil
	5/32 x 60# & mill coil

Application
ER630 classification is designed primarily for welding ASTM A564 type 630 and some other precipitation-hardening stainless steels. The composition is modified to prevent the formation of ferrite networks in the martensitic microstructure which has a great effect on mechanical properties. The weld metal may be used either as welded, welded and precipitation hardened, or welding and solution treated. Mechanical properties of this alloy are greatly influenced by the heat treatment.

Deposited Chemical Composition % (Typical)
C = 0.03	Mo = 0.20	P = 0.020
Cr = 16.51	Mn = 0.54	S = 0.018
Ni = 4.75	Si = 0.41	Cu = 3.62
Nb + Ta = 0.23

 

Mechanical Properties (R.T.)
Yield Strength	150,000psi
Tensile Strength	135,000psi
Elongation	10%

Deposited All Weld Metal Properties
They are dependent on the utilization of a post weld heat treatment and a precipitation hardening based on temp, and time exposed to temperature.

Recommended Welding Parameters
GMAW “Mig Process”				Reversed Polarity
	Wire Diameter	Wire Feed	Amps	Volts	Shielding Gas	Gas CFH
Short Arc Welding	.030	13-26	40-120	16-20	Argon+2% O2	25
	.035	13-26	60-140	16-22	Argon+2% O2	25
Spray Arc Welding	.035	20-39	140-220	24-29	Argon+2% O2	38
	.045	16-30	160-260	25-30	Argon+2% O2	38
	1/16	10-16	230-350	27-31	Argon+2% O2	38

Other shielding Gases may be used for Mig welding. Shielding gases are chosen taking Quality, Cost, and Operability into consideration

Recommended Welding Parameters
SAW “Submerged Arc Welding Process”		Reversed Polarity Suggested
Wire Diameter	Amps	Volts
3/32	250-450	28-32
1/8	300-500	29-34
5/32	400-600	30-35
3/16	500-700	30-35

Both Agglomerated and fused fluxes can be used for submerged arc welding.
Note: The chemical composition of the flux mainly affects the chemistry of the weld metal and consequently its corrosion resistance and Mechanical properties.