AMA 1261N | Product Name: |  |
| AWS/ASME SFA-5.4: | ||
| E 7018- A1–H8 | AWS/ASME SFA-5.5: | |
| E Mo B 20+ | DIN 8575: | |
| E Mo B 42 H10 | prEN 1599: |
Application/properties:
electrode 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):
| Mo | Si | Mn | C |
| 0.50 | 0.50 | 0.80 | 0.06 |
Mechanical Properties of all-weld metal:
(single values are typical values)
| Impact energy (J) ISO-V | Elongation | Yield Strength (N/mm2) | Tensile Strength (N/mm2) | Heat treatment |
+20°C | ||||
| 160 | > 22 | > 470 | 520 – 650 | T |
T: Tempered 1 hour at 620°C, air cooling
| Welding Parameters | |||
| Amperage (A) | Length (mm) | Diameter (mm) | |
| 65 – 90 | 350 | 2.5 | |
| 90 – 130 | 450 | 3.25 | |
| 140 – 180 | 450 | 4.0 | |
| 190 – 230 | 450 | 5.0 | |
 |
Materials:
| 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 | DIN 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 | EN 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 | ASTM Standard |
Rebaking:
required at 300°C to 350°C for 2 hours.