ER80S-B2 TIG- MIG Wire: What You Need to Know

What is ER80S-B2 TIG Filler Wire?

ER80S-B2 is a low-alloy steel filler wire that is used in the TIG welding process. It has a yield strength of 80,000 psi and is most commonly used in the welding of Chrome-Moly Base low-alloy steels & Carbon Steel to Cr-Mo alloys (dissimilar welding applications).

ER80S-B2 filler wire produces welds with adequate toughness, ductility & corrosion resistance, making it ideal for applications that require high strength and resistance to high-temperature oxidation.

What is ER80S-B2 MIG Filler Wire?

ER80S-B2 TIG Filler Wire is a versatile, all-position wire that can be used for a variety of welding applications.

ER80S-B2 TIG-MIG solid welding wire is used for welding of 0.5Cr-0.5Mo, 1Cr-0.5Mo, & 1-1/4Cr-1/2Mo low alloy steels.

ER80S-B2 MIG Filler Wire is a versatile welding wire that can be used for a variety of applications. It is an all-position wire that can be used in both TIG and MIG welding.

ER80S-B2 is supposed to use for welding in post-weld heat treatment conditions & if used in as welded condition, it requires special care.

ER80S-B2 Wire Specification

AWS Specification for ER80S-B2 is AWS A5.28. AWS A5.28 covers the chemical composition, mechanical properties, PWHT conditions and test requirements for ER80S-B2 wire classification.

A-Number of ER80S-B2 as per ASME Section IX is 3. The F-Number of ER80S-B2 is F-Number 6.

ER80S-B2 Wire Meaning & Full Form

ER80S-B2 is the wire classification as per AWS A5.28 Specification for low alloy steel electrodes & rods for Gas shielded welding arc processes such as TIG & MIG welding.

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The meaning of ER80S-B2 Filler wire/ Rod is:

  • ER: means Electrode
  • 80: means minimum 80 Ksi or 80000 psi minimum tensile strength of the weld deposit with ER80S-B2 wire.
  • S: stands for Solid wire.
  • B2: this means that the wire type is a Cr-Mo wire. You can find the full chemical composition in AWS A5.28 Table 1. Also, given in this post below is the full chemical composition of ER80S-B2.

Chemical Composition of ER80S-B2 TIG MIG Wire

The chemical composition of ER80S-B2 is specified in AWS A5.28 low alloy welding electrodes specification. Below are the range of permitted elements for ER80S-B2 welding wire chemistry:

Silicon0.30- 0.70
Chromium1.20- 1.50
Molybdenum0.40- 0.65
Other elements Total0.50
Single values are the maximum permitted.

Mechanical Properties of ER80S-B2 TIG MIG Wire

Mechanical properties of ER80S-B2 is also specified in AWS A5.28 specifications. The minimum tensile strength of ER80S-B2 is 80 Ksi (550 MPa), the Yield strength is 68 Ksi (470 MPa) & minimum elongation of 19%.

A summary of the mechanical properties of ER80S-B2 required as per AWS A5.28 are given in the below table:

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Tensile Strength80 Ksi (550 MPa) minimum
Yield Strength68 Ksi (470 MPa) minimum
Elongation percent19 minimum
ToughnessNot required
PWHT condition1150 ± 25°F (620 ± 15°C)

ER80S-B2 vs ER80S-D2

Both ER80S-B2 & ER80S-D2 welding wires are low alloy steel solid filler wires as per AWS A5.28 specification.

Although, both these wires are having different chemical compositions & mechanical properties. They are used for different welding applications.

ER80S-B2 is a Chrome-Moly base welding wire while the ER80S-D2 is a Manganese-Moly base filler wire.

ER80S-B2 is used for welding of Cr-Mo steel for high-temperature applications while ER80S-D2 is used for welding of high strength low alloy steel and carbon steel.

ER80S-B2 requires a post-weld heat treatment for welding while ER80S-D2 can be used in as-welded or PWHT conditions. ER80S-D2 is mostly used in as-welded conditions only.

ER80S-D2 has a high amount of deoxidizer (Mn & Si) thus helping to control welding porosity when welding with CO2 as shielding gas. ER80S-B2 however must be used with argon gas shielding only.

There are no toughness requirements for ER80S-B2 welding filler wire but ER80S-D2 requires a minimum weld toughness of 20 ft·lbf at –20°F (27 J at –30°C).

ER80S-B2 Equivalent Stick Welding (SMAW) Rod

ER80S-B2 Equivalent Stick Welding (SMAW) Rod is E8018-B2 or E8015-B2 rod as per the AWS A5.5 welding electrode specification.

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Both ER80S-B2 & E8018-B2 give the same weld deposit properties although the welding process varies.

Preheat & Interpass temperature for ER80S-B2

Being low alloy steel with added alloying elements such as Nickel, chromium & Moly, ER80S-B2 requires stringent control on welding preheat, interpass & PWHT conditions to avoid cracking problems.

The minimum welding preheat temperature when welding with ER80S-B2 is 275°F (135°C).

The interpass temperature for welding application using R80S-B2 is a maximum of 325°F (165°C).

ER80S-B2 Welding Polarity for TIG & MIG Welding

ER80S-B2 is welded using DCEN polarity in TIG welding. Pure argon is used as welding gas for gas shielding. The welding polarity of ER80S-B2 in MIG welding is DCEP.

What is ER80S-B2 used for?

ER80S-B2 is a welding wire that is used for welding carbon and low alloy steels. It has a chemical composition of Fe-Mn-C-Si and a tensile strength of 80,000 psi.

This wire is especially useful for welding high-strength, low alloy steels because it has good toughness and ductility.

ER80S-B2 TIG-MIG solid welding wire is used for welding of 0.5Cr-0.5Mo, 1Cr-0.5Mo, & 1-1/4Cr-1/2Mo low alloy steels. It is also used for dissimilar welding of Chrome-Moly steel to carbon steel.

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