DETAILS
Mild steel and low hydrogen electrode designed to meet the H4R designation from AWS A5 - Retail Small Packaging (RSP). All RSP products carry AWS compliance. Unlike the standard products, RSP products have no other agencies approvals.
Features
- Smooth arc performance
- Legacy product specified in many old PQR
- Legacy product mainly used in shipbuilding
Disclaimers
Service Information
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 |
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) |
|---|---|---|---|---|
| E7018 H4R Requirement | 400 (58) min. | 480 (70) min. | 22 min. | 27 (20) min. |
| Typical Result, As-welded | 430-470 (62-68) | 520-570 (75-83) | 27-30 | 130-313 (96-231) |
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 | 0.03-0.06 | 0.89-1.19 | 0.01 | 0.02-0.04 | 0.011-0.013 | 0.007-0.011 | 0.20-0.30 | 0.01 | 0.96-1.31 | 2 | 0.1 | 0.2-0.3 |
TYPICAL OPERATING PROCEDURES
| Diameter | Polarity⁽¹⁾ |
Current
Amps |
|---|---|---|
| 3/32" (2.4 mm) | DC+ | 65-100 |
| 3/32" (2.4 mm) | AC | 70-105 |
| 1/8" (3.2 mm) | DC+ | 110-160 |
| 1/8" (3.2 mm) | AC | 120-170 |
| 5/32" (4.0 mm) | DC+ | 130-200 |
| 5/32" (4.0 mm) | AC | 140-230 |
NOTES
| Note |
|---|
| ⁽¹⁾ Preferred polarity is listed first. |