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General Description

AS B-255 is a basic coated electrode. Compared to the AS B-255, it allows for welding at lower currents thanks to its thinner cover diameter and special chemical changes made in its formula. This makes it possible to control easily weld pool by the welder when welding in position applications. The wetting capability of the weld metal is increased to ensure a good filling in the weld groove and to provide an excellent bead shape and profile. Weld metal has high impact strength at low temperatures. As the weld metal is very resistant to hot cracking, it is used particularly to weld rigidly restrained mass structures where high welding stresses are unavoidable. The slag is easy to remove and it gives very high quality, smooth weld beads. It has 115 % metal recovery.


Classification and Typical Weld Metal Composition

AWS A5.1 : E 7018-1 H4
EN ISO 2560-A : E 46 5 B 42 H5
C Si Mn  






Mechanical Properties of the Weld Metal, Typical

Yield Strength : 518 (N/mm²)    
Tensile Strength : 596 (N/mm²)    
Elongation (L=5d) : 27 (%)    
Impact (ISO-V)
: 83 (Joule) (–50°C)  

Note : Redrying temperature is 300-400°C / 2-3 hours


Applications and Materials to be Welded

AS B-257 PIPE is especially designed for pipe welding applications. However, it provides excellent results in upward and overhead positions. It is suitable for fine grained structural steels having high yield strength values. It is designed for steel constructions and machines operating under dynamic forces at low temperatures. Welding of ship's plate of A-, D- and E- quality, boiler and pressure vessel manufacturing and pipe connections are among its application areas. AS B-255 PIPE can join steel parts to steel casts and can be used in the welding of thick parts. It is suitable for root passes and for welding in difficult positions. It gives excellent weld beads with high impact strength values at subzero temperatures. 

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, St 70-2
EN: E295, E335, E360
DIN: C 60, Ck 60
EN: C60
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 :
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, GS-70
EN: GE200, GE240, GE260, GE300, S355JOC
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
EN: L415NB
DIN: X42, X46, X52, X60 (API 5LX)

Welding Parameters / Packing and Diameter Informations

Current Type and Polarity : DC (+) / AC min. 65V

Electrode Weight
(g/100 pcs)
2.50 350 65 - 110   2263 90 2,0
3.25 350 95 - 145   3526