Detalles
Designed to handle poor fit-up on heavy wall tubes and gaps up to 9.5 mm (3/8 in) with 6.4 mm (1/4 in) offset. Recommended for all position welding on unlimited plate thicknesses.
Características
- Designed to handle poor fit-up on heavy wall tubes and gaps up to 9.5 mm (3/8 in) with 6.4 mm (1/4 in) offset
- Fast freezing slag with excellent wash-in
- Root bead capability without back-up bars
Servicio de información
Documentación
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CONFORMANCE
| CONFORMANCES | SPECIFICATION | CLASSIFICATION |
|---|---|---|
| AWS | AWS A5.20 | E71T-8-JH8 |
| AWS | AWS A5.36 | E71T8-A4-CS3-H8 |
| ABS | ABS - Part 2 | 3YSA H15 |
| BV | BV - Chapter 5 | SA3YMH |
| CWB | CSA W48 | E491T8-A4-CS3-H8 (E491T-8-JH8) |
| DNV-GL | DNV - 2.9 | III YMS H10 |
| LR | LR - Chapter 11 | 3YS H15 |
MECHANICAL PROPERTIES
| Classification | Polarity |
Yield Strength @ 0.2% Offset
MPa (ksi) |
Tensile Strength
MPa (ksi) |
Elongation
% |
Charpy V-Notch
J (ft-lbs) @ -30°C (-20°F) |
Charpy V-Notch
J (ft-lbs) @ -40°C (-40°F) |
|---|---|---|---|---|---|---|
| E71T-8-JH8 Requirement | DC- | 400 (58) min. | 480-660 (70-95) | 22 min. | 27 (20) min. | |
| E71T8-A4-CS3-H8 Requirement | DC- | 400 (58) min. | 480-660 (70-95) | 22 min. | 27 (20) min. | |
| Typical Result, As-welded | DC- | 400 (58) | 500-570 (72-82) | 26 | 96-354 (71-261) | 35-398 (26-294) |
DEPOSIT COMPOSITION
| Classification | Polarity | %Al | %C | %Mn | %P | %S | %Si |
Diffusible Hydrogen
mL/100g Weld Metal |
|---|---|---|---|---|---|---|---|---|
| E71T-8-JH8 Requirement | DC- | 0.30 max. | 1.75 max. | 0.03 max. | 0.03 max. | 0.60 max. | 8.0 max. | |
| E71T8-A4-CS3-H8 Requirement | DC- | 0.30 max. | 1.75 max. | 0.030 max. | 0.030 max. | 0.60 max. | 8 max. | |
| Typical Result | DC- | 0.7-1.1 | 0.05-0.07 | 1.25-1.56 | 0.012 | 0.004 | 0.20-0.28 | 5.3 |
TYPICAL OPERATING PROCEDURES
| Diameter | Polarity |
CTWD
mm (in.) |
Wire Feed Speed
m/min (in/min) |
Voltage
volts |
Approx. Current
amps |
Melt-off Rate
kg/hr (lb/hr) |
Deposition Rate
kg/hr (lb/hr) |
Efficiency
% |
|---|---|---|---|---|---|---|---|---|
| 0.068 in (1.7 mm) | DC- | 25 (1) | 1.8 (70) | 16-17 | 145 | 1.5 (3.3) | 1.0 (2.3) | 69 |
| 0.068 in (1.7 mm) | DC- | 25 (1) | 2.3 (90) | 18-19 | 180 | 1.9 (4.2) | 1.5 (3.2) | 76 |
| 0.068 in (1.7 mm) | DC- | 25 (1) | 3.0 (120) | 20-21 | 225 | 2.5 (5.6) | 2.0 (4.3) | 76 |
| 0.068 in (1.7 mm) | DC- | 25 (1) | 3.5 (140) | 21-22 | 255 | 2.9 (6.4) | 2.2 (4.8) | 75 |
| 0.068 in (1.7 mm) | DC- | 25 (1) | 3.8 (150) | 23-24 | 265 | 3.1 (6.8) | 2.3 (5.1) | 75 |
| 5/64 in (2.0 mm) | DC- | 25 (1) | 1.3 (50) | 16-17 | 130 | 1.4 (3.1) | 0.9 (1.9) | 61 |
| 5/64 in (2.0 mm) | DC- | 25 (1) | 1.8 (70) | 18-19 | 180 | 2.0 (4.3) | 1.3 (2.9) | 67 |
| 5/64 in (2.0 mm) | DC- | 25 (1) | 2.3 (90) | 19-20 | 220 | 2.5 (5.6) | 1.9 (4.2) | 75 |
| 5/64 in (2.0 mm) | DC- | 25 (1) | 2.8 (110) | 20-21 | 260 | 3.1 (6.8) | 2.4 (5.3) | 77 |
| 5/64 in (2.0 mm) | DC- | 25 (1) | 3.0 (120) | 21-22 | 280 | 3.4 (7.4) | 2.7 (5.9) | 79 |
| 5/64 in (2.0 mm) | DC- | 25 (1) | 3.5 (140) | 22-23 | 310 | 3.9 (8.7) | 3.1 (6.8) | 79 |