AS B-255 H4R

Askaynak

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General Description

AS B-255 H4R is a basic coated electrode. 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 restrained mass structures where high welding stress is unavoidable. The slag is easy to remove and it gives very high quality, smooth weld beads. It has 125% metal recovery.

 

Classification and Chemical Composition

TS EN ISO 2560-A : E 42 4 B 42 H5
AWS A5.1 : E 7018 H4R
EN ISO 2560-A : E 42 4 B 42 H5
C Si Mn  

0,07

0,50

1,20

 

 

Mechanical Properties

Yield Strength : 490 (N/mm²)    
Tensile Strength : 590 (N/mm²)    
Elongation (L=5d) : 30 (%)    
Impact
: 92 (Joule) (–50°C)  

Note: Redrying Temperature 350-400°C / 3 hours.

 

Approvals

ABS

BV

DNV

GL

LRS

 

Applications and Materials to be Welded

AS B-255 H4R is especially 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 H4R can join steel parts to steel casts and can be used in the 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.

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 and 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, GS 70
EN: GE200, GE240, GE260, GE300, S355J0C
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
(A)
Electrode Weight 
(gr/100 pcs)
Electrode per box 
Vacuum Pack Weight 
(kg)
2.50 350   80 - 110   2439   82 2,0
3.25 350 110 - 145   3846   52 2,0
4.00 450 140 - 190   8519   27 2,3
5.00 450 180 - 240 13333   18 2,4
 

Welding Positions

 

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