DETAILS
Low hydrogen (or basic) electrodes are designed for applications susceptible to hydrogen cracking.
Features
- Premium arc performance
- Extreme bend ability
- Excellent moisture resistance
- Clean arc start
- Clear puddle
- Smooth arc
Typical Applications
- Structural
- Chemical processing structures
- Pressure pipping
- Ship building
- Mild steel
Welding Positions
- All except vertical down
Shielding Gas
- Not Applicable
Special Features
- Excalibur® 7018 XMR™ offers superior moisture resistance even after 24 hours – remaining below the moisture content limit for 15 hours more than required under AWS A5.
Disclaimers
BEFORE USE, READ AND UNDERSTAND THE SAFETY DATA SHEET (SDS) FOR THIS PRODUCT AND SPECIFIC INFORMATION PRINTED ON THE PRODUCT CONTAINER. SDS Search page
See test result disclaimer
CONFORMANCE
CONFORMANCES | SPECIFICATION | CLASSIFICATION |
---|---|---|
AWS | AWS A5.1 | E7018 H4R |
ISO | ISO 2560-B | E4918 A H5 |
ABS | ABS - Part 2 | 3YH5 |
BV | BV - Chapter 5 | 3YHHH |
CWB | CSA W48 | E4918 |
DNV-GL | DNV - 2.9 | 3YH5 |
LR | LR - Chapter 11 | 3YM H5 |
MECHANICAL PROPERTIES
Classification |
Yield Strength @ 0.2% Offset
MPa (ksi) |
Tensile Strength
MPa (ksi) |
Elongation
% |
Charpy V-Notch
J (ft-lbs) @ -30°C (-20°F) |
Hardness Rockwell B |
---|---|---|---|---|---|
E7018 H4R Requirement | 400 (58) min. | 480 (70) min. | 22 min. | 27 (20) min. | |
Typical Result, As-welded | 420-470 (62-68) | 520-570 (75-83) | 27-32 | 96-416 (71-307) | 82-89 |
DEPOSIT COMPOSITION
Classification | %C | %Cr | %Mn | %Mo | %Ni | %P | %S | %Si | %V | %Mn+Ni+Cr+Mo+V |
Diffusible Hydrogen
mL/100g Weld Metal |
1800F H2O - As received | 1800F H2O - After 9 hrs at 80F/80%RH |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
E7018 H4R Requirement | 0.15 max. | 0.20 max. | 1.60 max. | 0.30 max. | 0.30 max. | 0.035 max. | 0.035 max. | 0.75 max. | 0.08 max. | 1.75 max. | 4 max. | 0.3 max. | 0.4 max. |
Typical Result | 0.05-0.06 | 0.03 | 1.16-1.35 | 0.01 max. | 0.02-0.03 | 0.010-0.014 | 0.005-0.009 | 0.43-0.54 | 0.01 max. | 1.25-1.42 | 2 | 0.1 | 0.2 |
TYPICAL OPERATING PROCEDURES
Diameter | Polarity |
Current
Amps |
---|---|---|
3/32" (2.4 mm) | DC+ | 70-110 |
3/32" (2.4 mm) | AC | 80-120 |
1/8" (3.2 mm) | DC+ | 90-160 |
1/8" (3.2 mm) | AC | 100-160 |
5/32" (4.0 mm) | DC+ | 130-210 |
5/32" (4.0 mm) | AC | 140-210 |