DETAILS
Mild Steel, Low Hydrogen • AWS E7018 H4R
Features
- Improved coating integrity
- Extreme bendability
- Premium arc performance
- Excellent moisture resistance
- Clear puddle and a smooth arc
Typical Applications
- Structure
- Ship Building
- Chemical Processing Structures
- Pressure piping
- Mild steel
Welding Positions
- All except vertical down
Shielding Gas
- Not Applicable
Special Features
- Available to meet Buy America. Choose a Buy America MTS product from the list of Available Types or contact a Lincoln Electric representative
Service Information
You May Also Need
BEFORE USE, READ AND UNDERSTAND THE SAFETY DATA SHEET (SDS) FOR THIS PRODUCT AND SPECIFIC INFORMATION PRINTED ON THE PRODUCT CONTAINER. SDS Search page
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 | 420-510 (60-74) | 510-600 (74-87) | 24-36 | 27-413 (20-304) | 82-91 |
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 | 0.04-0.07 | 0.02-0.06 | 1.08-1.51 | 0.04 max. | 0.01-0.05 | 0.009-0.016 | 0.004-0.011 | 0.41-0.66 | 0.01 max. | 1.15-1.59 | 1-4 | 0.1 max. | 0.2-0.4 |
TYPICAL OPERATING PROCEDURES
| Diameter | Polarity⁽¹⁾ |
Current
Amps |
|---|---|---|
| 3/32 in (2.4 mm) | DC+ | 70-110 |
| 3/32 in (2.4 mm) | AC | 80-120 |
| 1/8 in (3.2 mm) | DC+ | 90-160 |
| 1/8 in (3.2 mm) | AC | 100-160 |
| 5/32 in (4.0 mm) | DC+ | 130-210 |
| 5/32 in (4.0 mm) | AC | 140-210 |
| 3/16 in (4.8 mm) | DC+ | 180-300 |
| 3/16 in (4.8 mm) | AC | 200-300 |
| 7/32 in (5.6 mm) | DC+ | 250-330 |
| 7/32 in (5.6 mm) | AC | 270-370 |
| 1/4 in (6.4 mm) | DC+ | 300-400 |
| 1/4 in (6.4 mm) | AC | 325-420 |
NOTES
| Note |
|---|
| ⁽¹⁾ Preferred polarity is listed first. |
| Extreme bendability applies to 3/32, 1/8, and 5/32 in. diameters. |