ThePipingMart Blog Welding Electrodes AWS Class ER309/309L SAW & Flux Welding Rod – Composition, Properties, and Uses

AWS Class ER309/309L SAW & Flux Welding Rod – Composition, Properties, and Uses

AWS Class ER309/309L SAW & Flux

If you work in industries like chemical processing, oil and gas, pharmaceuticals, etc., you know the importance of choosing the right materials for your projects. AWS Class ER309/309L SAW & Flux is a type of stainless steel commonly used in these industries. If you want to know everything there is to know about this material, keep on reading.

What is AWS Class ER309/309L SAW & Flux?

AWS Class ER309/309L SAW & Flux welding wire is a type of austenitic stainless steel used in various welding applications. Its low carbon content makes it suitable for welding dissimilar metals like carbon steel to stainless steel. The ER309L flux can be used for welding carbon or low-alloy steel to stainless steel grades like 304, 304L, 308L, etc.

ER309/309L SAW & Flux Welding Rod Composition

AWS Class ER309/309L SAW & Flux welding alloy contains mainly iron, carbon, chromium, and nickel. The percentage composition of these elements varies, depending on the manufacturer’s formulation. However, the broad range of alloying elements is as follows:

C Cr Ni Mo Mn Si P S Cu
0.03 23.0-25.0 12.0-14.0 0.75 1.0-2.5 0.30-0.65 0.03 0.03 0.75

ER309/309L SAW & Flux Coated Rod Physical Properties

AWS Class ER309/309L SAW & Flux welding electrode has high tensile strength, yield strength, and elongation. Here are some of its physical properties:

  • Density: 7.8 g/cm3 (0.282 lb/in.3)
  • Melting point: 1350-1400°C (2460-2550°F)
  • Electrical resistivity: 7.4 µΩ⋅m (22.6 µΩ⋅in)
  • Thermal conductivity: 16.2 W/(m·K) (9.4 BTU·in/(ft²·h·°F))

ER309/309L SAW & Flux Welding Rod Mechanical Properties

AWS Class ER309/309L SAW & Flux filler wire has good mechanical properties, making it suitable for welding applications in various industries. Here are some of its mechanical properties:

Tensile Strength, kpsi: 86*
Yield Strength, kpsi: 58*
Elongation %: 40*

 ER309/309L SAW & Flux Coated  Rod Trade Names

Class UNS Oxford Alloys
ER309/309L S30983 Alloy 309/309L

ER309/309L SAW & Flux Welding Rod Parameters

Diameter Process Volt Amps Shielding Gas
in (mm)
 .035  (0.9) GMAW  22-23 180-210 Spray transfer 98% Argon/2% Oxygen
 .045  (1.2) GMAW  23-25 195-260  Spray transfer 98% Argon/2% Oxygen
 1/16  (1.6) GMAW  25-28 260-390  Spray transfer 98% Argon/2% Oxygen
 .035  (0.9) GMAW  19-23 55-170  Short Circuiting Transfer 90% Helium/  7 ½% Argon / 2 ½% CO2
 .045  (1.14) GMAW  19-23 100-185 Short Circuiting Transfer 90% Helium/  7 ½% Argon / 2 ½% CO2
 .035  (0.9) GTAW  12-15 60-100  100% Argon
 .045  (1.14) GTAW  13-16 70-120  100% Argon
1/16 (1.6) GTAW 14-16 90-130 100% Argon
 3/32  (2.4) GTAW  15-20 120-175  100% Argon
 1/8  (3.2) GTAW  16-20 150-220  100% Argon

ER309/309L SAW & Flux Coated Rod Uses

AWS Class ER309/309L SAW & Flux filler metal suits various industry applications. Some of the common uses of this material are as follows:

  • Chemical processing equipment
  • Heat exchangers
  • Oil and gas processing
  • Pharmaceutical equipment
  • Pulp and paper production
  • Food processing equipment
  • Cryogenic applications
  • Welding dissimilar metals

ER309/309L SAW & Flux Welding Rod Heat Treatment

AWS Class ER309/309L SAW & Flux is not designed to be heat-treated. However, you can anneal the material after welding to enhance its properties. Annealing should be done at a temperature range of 1850-2050°F (1010-1120°C) and a cooling rate of 20°F (11°C) per hour.

ER309/309L SAW & Flux Coated Rod Corrosion Resistant

AWS Class ER309/309L SAW & Flux has excellent corrosion resistance properties. It resists various corrosive agents like nitric acid, sulfuric acid, and acetic acid. However, it is unsuitable for environments with high chloride concentrations, like seawater.

Conclusion

AWS Class ER309/309L SAW & Flux is an austenitic stainless steel material commonly used in welding applications. It has excellent mechanical and physical properties making it suitable for various applications. AWS Class ER309/309L SAW & Flux is not designed to be heat-treated but can be annealed after welding to enhance its properties. It has excellent corrosion-resistant properties but is unsuitable for environments with high chloride concentrations. Choosing the right material for your projects is crucial, and AWS Class ER309/309L SAW & Flux is undoubtedly an excellent option to consider.

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