E 7018–A1–H4R
AWS/ASME SFA-5.5 :E Mo B 20+
DIN 8575:E Mo B 42 H 5
prEN 1599:Application/properties:
Basic electrode that uses nano technology in a humid environment with 80% humidity, the electrode coating is resistant to moisture absorption for 9 hours.This electrode is suitable for welding of creep resistant and high-pressure hydrogen resistant steels used in the construction of pressure vessels, boilers and piping subjected to operating temperatures up to+550°C. Welds are of X-ray quality.
Preheating, inter-pass temperature and post-weld heat treatment in accordance with base metal to be welded.
Weld metal analysis in % (typical values):
| C | Mn | Si | Mo |
|---|---|---|---|
| 0.06 | 0.80 | 0.50 | 0.50 |
Mechanical Properties of all-weld metal:
(single values are typical values)
| Heat Treatment | Tensile Strength (N/mm2) | Yield Strength (N/mm2) | Elongation A5 (%) | Impact Energy (J) ISO-V +20°C |
|---|---|---|---|---|
| T | 520 - 650 | > 470 | > 22 | 160 |
T: Tempered 1 hour at 620°C, air cooling
| Welding Parameters | ||
|---|---|---|
| Diameter (mm) | Length (mm) | Amperage (A) |
| 2.5 | 350 | 65 - 90 |
| 3.25 | 450 | 90 - 130 |
| 4.0 | 450 | 140 - 180 |
| 5.0 | 450 | 190 - 230 |
Materials:
| DIN Standard | St 37-3 to St 52-3; St 37-2 to St 60-2; St 35.8 to St 45.8; StE 320.7 to StE 415.7; StE 255 to StE 500; 17Mn4; 19Mn5; 15Mo3; TStE 255 to TStE 500 |
| EN Standard | S355J2G3; E295; E335; P255G1TH; L320 to L415NB; L320MB to L415MBM; S255N to S500N; P295GH; P310GH; 16Mo3; 15NiCuMoNb5, 20MnMoNi4-5; 17MnMoV6-4; S255NH to S500NH; S255NL to S500NL |
| ASTM Standard | A204 Gr. A, B, C; A217 Gr. WC1; A213 Gr. T2; A355 Gr. P1; A182M Gr. F1; A204M Gr. A, B, C; A250 Gr. T1 |
| API Spec. 5 L: X52, X56, X60 |
Remarks:
