AS B-248
Askaynak
General Description
AS B-248 is a basic coated electrode. It is used particularly to weld rigidly restrained mass structures where high welding stresses are unavoidable. Weld metal has a high resistance to cracking. The slag is easy to remove and it gives excellent quality, smooth weld beads. It is also suitable for welding in vertical upwards position at a high welding speed. It has 125% metal recovery.
Classification and Typical Weld Metal Composition
| AWS A5.1 | : | E 7018 |
| EN ISO 2560-A | : | E 42 3 B 42 H10 |
| C | Si | Mn | |
|
0,07 |
0,50 |
0,90 |
|
Mechanical Properties of the Weld Metal, Typical
| Yield Strength | : | 460 | (N/mm²) | ||
|---|---|---|---|---|---|
| Tensile Strength | : | 530 | (N/mm²) | ||
| Elongation (L=5d) | : | 28 | (%) | ||
| Impact (ISO-V) |
: | 110 | (Joule) | (–30°C) | |
| 80 | (Joule) | (–40°C) |
Note : Redrying temperature is 250-400°C / 2-3 hours
Approvals and Certificates
Lloyd Approvals
|
ABS |
BV |
DNV |
GL |
LRS |
RINA |
RMRS |
TL |
Certificates
|
CE |
DB |
GOST |
NAKS |
SEPRO |
TSE |
TÜV |
Applications and Materials to be Welded
AS B-248 is suitable for steel constructions and machines operating under dynamic forces. Ship building, boiler and pressure vessel manufacturing and pipe connections are among its application areas. It is recommended for the welding of high carbon, high strength low alloyed steels having high (P) and (S) content; high strength ship's plate of A-, D- and E- quality and vessel plates of 17 Mn 4 and 19 Mn 5 type. AS B-248 can join steel parts to steel casts and can be used in welding of thick parts. It is suitable for the root pass and welding in difficult positions. It gives excellent weld beads with high impact strength values at subzero temperatures. It is also very suitable for welding of GALVANIZED plates.
| General Structural Steels : |
| DIN: St 33, St 34, St 37, St 44, St 44-2, St 44-3, St 52 EN: S185, S235, S275, S355 DIN: St 37-4, St 44-4, St 52-4 EN: P235TR2 - P355T2 DIN: St 50-2, St 60-2 EN: E295, E335 DIN: C 55, Ck 55 EN: C55 |
| Fine Grained Steels : |
| DIN: StE 255 - StE 420 EN: S255N - S420N DIN: WStE 255 - WStE 420 EN: P255NH - P420NH DIN: TStE 255 - TStE 420 EN: S255NL - S420NL / P275NL1 - P355NL1 |
| Elevated Temperature Steels : |
| DIN: St 35-8, St 45-8 EN: P235G1TH - P255G1TH |
| Boiler & Pressure Vessel Steels : |
| DIN: HI, HII, HIII EN: P235GH, P265GH, P285NH DIN: 17 Mn 4, 19 Mn 6 EN: P295GH, P355GH |
| Ship Plates : |
| DIN: A, D, E DIN: AH32 - EH36 |
| Cast Steels : |
| DIN: GS-38, GS-45, GS-52, GS-60 EN: GE200, GE240, GE260, GE300 DIN: GS-62 |
| Pipe Materials : |
| DIN: StE 210-7 - StE 360-7 EN: L210 - L360NB DIN: StE 290-7 TM - StE 360-7 TM EN: L290MB - L360MB DIN: X42, X46, X52, X60 (API 5LX) |
Welding Parameters / Packing and Diameter Informations
Current Type and Polarity : DC (+)
| Diameter (mm) |
Length (mm) |
Current (Amper) |
Electrode Weight (g/100 pcs) |
Quantity (pcs/box) |
Weight (kg/box) |
|---|---|---|---|---|---|
| 2.00 | 300 | 50 - 80 | 1400 | 130 | 1,8 |
| 2.50 | 350 | 80 - 110 | 2420 | 90 | 2,2 |
| 3.25 | 350 | 110 - 145 | 3800 | 90 | 3,4 |
| 4.00 | 450 | 130 - 190 | 7230 | 90 | 6,5 |
| 5.00 | 450 | 190 - 245 | 10700 | 60 | 6,4 |
