E81T1-B2
AWS A5.29 E81T1-B2C, E81T1-B2M
ASME SFA 5.29 E81T1-B2C, E81T1-B2M
E81T1-B2 is a titania slag formulation flux cored wire for single or multi-pass welds on 1.25% Cr 0.5% Mo steels used for high pressure steam pipes of boilers, oil refining processing equipment, pressure vessels and castings of the same alloy content. The weld deposits are designed to operate at high temperature service. The shield gas recommended is 100% CO2.
A preheat of 200-350°C and a post-weld heat treatment of 680-730°C for 1 hour per inch of thickness followed by air cooling to ambient temperature is required.
Applications:
E81T1-B2 is used extensively in the fabrication and repair of pressure vessels, petrochemical processing equipment, and piping
systems. The weld metal analysis of the deposit is similar to E8018-B2 Low Hydrogen Electrodes. E81T1- B2 is also used to weld 0.5% Cr – 0.5% Mo, 1.0% Cr – 0.5% Mo, and 1.25% Cr – 0.5% Mo steels.
The weld deposits are smooth and have deep penetration. USA B1T1-B2 is noted for its smooth arc and minimum spatter. When used for horizontal fillet joints the weld bead has equal leg lengths, flat faced fillets with fine ripples. This is an all-position wire and can also be used with Argon-CO2 mixed shield gas.
TYPICAL WELD METAL CHEMISTRY (%)
- | E81TT1-B2 | AWS Spec |
|---|---|---|
C | 0.04 | 0.05-0.12 |
Mn | 1.08 | 1.25 max. |
Cr | 1.25 | 1.0-1.5 |
Si | 0.44 | 0.80 max. |
Mo | 0.53 | 0.40-0.65 |
S | 0.011 | 0.03 max. |
P | 0.014 | 0.03 max. |
TYPICAL MECHANICAL PROPERTIES OF WELD DEPOSIT
(As welded)
- | E81TT1-B2 | AWS Spec |
|---|---|---|
Yield Strength (psi) | 77,000 | 68,000 |
Ultimate Tensile Strength (psi) | 87,000 | 80,000-100,000 |
Elongation in 2" (%) | 29 | 19 min |
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