En
FaE 9018–B3–H8
1245n ama 1254n
Welding electrode for creep resistant steels
AMA 1245N
| AWS/ASME SFA – 5.5: | E 9018–B3–H8 |
| DIN 8575 : | E CrMo 2 B 20+ |
| prEN 1599: | E CrMo 1 B 32 H 10 |
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+600°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 | Cr | Mo |
|---|---|---|---|---|
| 0.06 | 0.80 | 0.50 | 2.40 | 1 |
Mechanical Properties of all-weld metal:
(single values are typical values)
|
Tensile Strength ( N/mm 2 ) |
Yield Strength ( N/mm 2 ) |
Elongation A5 %) |
Impact energy (J) ISO - V 20°C+ |
Heat treatment |
|---|---|---|---|---|
| 570 - 670 | > 440 | >22 | 100 | T |
| 500 - 600 | > 350 | >24 | 140 | N+T |
T: Tempered 0.5 h at 700C, air cooling
N+T: Normalized + Tempered 0.5 h at 920C, air cooling + 0.5 h at 750C
| Welding Parameters | ||
|---|---|---|
| Diameter (mm) | Length (mm) | Amperage (A) |
| 2.5 | 350 | 50 – 85 |
| 3.25 | 450 | 85 – 130 |
| 4.0 | 450 | 90 – 180 |
| 5.0 | 450 | 150 – 240 |
Materials:
| DIN Standard | 10CrMo 9 10, 10 CrSiMo V 7, 24 CrMo 10; GS- 12 CrMo 9 10, GS–19 CrMo 9 10 |
| EN Standard | 10CrMo9-10, 10 CrSiMoV 7; G17CrMo9-10 |
| ASTM Standard | A335 Gr. P22; A217 Gr.WC 9 |
Rebaking:
required at 300°C to 350°C for 2 hours.
