DETAILS
Low Alloy, Low Hydrogen • AWS E8018-B2 H4R
Features
- Designed for welding 1.25% chromium, 0.50% molybdenum steel
- Premium arc performance
- Easy strike and slag removal
Typical Applications
- Power generation
- Chemical Processing Structure
- Process piping
- Applications requiring stress-relieved conditions
Welding Positions
- All except vertical down
Shielding Gas
- Not Applicable
Service Information
Documentation
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
See test result disclaimer
CONFORMANCE
| CONFORMANCES | SPECIFICATION | CLASSIFICATION |
|---|---|---|
| AWS | AWS A5.5 | E8018-B2 H4R |
| CWB | CSA W48 | E5518-B2 (E8018-B2) |
MECHANICAL PROPERTIES
| Classification |
Yield Strength @ 0.2% Offset
MPa (ksi) |
Tensile Strength
MPa (ksi) |
Elongation
% |
Hardness Rockwell B |
|---|---|---|---|---|
| E8018-B2 H4R Requirement | 460 (67) min. | 550 (80) min. | 19 min. | |
| Typical Result, 1 hour @ 690°C (1275°F) | 540-640 (78-93) | 650-740 (95-107) | 21-28 | 93-98 |
DEPOSIT COMPOSITION
| Classification | %C | %Cr | %Mn | %Mo | %P | %S | %Si |
Diffusible Hydrogen
mL/100g Weld Metal |
1800F H2O - As received | 1800F H2O - After 9 hrs at 80F/80%RH |
|---|---|---|---|---|---|---|---|---|---|---|
| E8018-B2 H4R Requirement | 0.05 - 0.12 | 1.00 - 1.50 | 0.90 max. | 0.40 - 0.65 | 0.03 max. | 0.03 max. | 0.80 max. | 4 max. | 0.2 max. | 0.4 max. |
| Typical Result | 0.09-0.12 | 1.13-1.41 | 0.68-0.89 | 0.48-0.64 | 0.01-0.02 | 0.01 max. | 0.44-0.64 | 1-2.4 | 0.1 max. | 0.1-0.4 |
TYPICAL OPERATING PROCEDURES
| Diameter | Polarity⁽¹⁾ |
Current
Amps |
|---|---|---|
| 3/32 in (2.4 mm) | DC+ | 60-110 |
| 3/32 in (2.4 mm) | AC | 65-120 |
| 1/8 in (3.2 mm) | DC+ | 85-160 |
| 1/8 in (3.2 mm) | AC | 90-170 |
| 5/32 in (4.0 mm) | DC+ | 110-210 |
| 5/32 in (4.0 mm) | AC | 115-220 |
NOTES
| Note |
|---|
| ⁽¹⁾ Preferred polarity is listed first. |