E 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 )
Yield Strength
( N/mm )
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.