R60 (RG60)

 

AWS A5.2 Class R60

RG60 is used to produce high tensile strength quality welds on low carbon and low alloy steels such as sheets, plates, pipes of grades A and B analysis and structural shapes. It is recommended for critical welds that must respond to the same annealing and heat treatment as regular grades of cast steel. The high silicon and manganese composition removes impurities from the molten metal thereby eliminating the need for flux. Clean joint and bevel heavy sections keeping torch tip at low angle to base metal. Pre-

heat normally not necessary as your torch will preheat during your process. Use a neutral flame or a very slight excess of acetylene (reducing flame). AWS changed this class from “RG” to “R” in 1969

 

 

 

TYPICAL WIRE CHEMISTRY (%)

 

 

-	R60	AWS Spec
C	0.09	0.15 max.
Mn	1.05	0.90-1.40
Si	0.18	0.10-0.35
P	0.11	0.035 max.
S	0.12	0.035 max.
Cu	0.15	0.30 max.
Cr	0.07	0.20 max.
Ni	0.13	0.30 max.
Mo	0.08	0.20 max.
Al	0.01	0.02 max.

 

Typical mechanical properties of weld metal (C02 shielding gas)

 

-	R60	AWS Spec
Yield strength (psi)
Ultimate tensile strength (psi)	60,000-75,000
Elongation in 2" (%)	24	20 min
Charpy V-notch at -60 F (ft. lbs)