AS DA-777

Askaynak

Ürün Broşürü (PDF)

General Description

AS DA-777 is a basic coated electrode for joining and welding of heat and creep resistant steels containing 2.2 % Cr + 1 % Mo that are exposed to operating temperatures up to 600°C. The weld metal has a high resistance to cracking. AS DA-777 runs with a quite, stable arc giving a minimum amount of spatter and smooth weld beads. It is recommended to use the electrode in DC (+).

 

Classification and Typical Weld Metal Composition

TS EN ISO 3580-A : E CrMo 2 B 22
AWS A5.5 : E9018-B3
C Si Mn Cr Mo  

0,05

0,40

0,80

2,40

1,10

 

 

Mechanical Properties of the Weld Metal, Typical

Yield Strength : 560 (N/mm²)    
Tensile Strength : 650 (N/mm²)    
Elongation (L=5d) : 22 (%)    
Impact (ISO-V)
: 80 (Joule) (+20°C)  
 

Approvals and Certificates

Certificates

GOST

SEPRO

TSEK

 

Applications and Materials to be Welded

Power plant constructions; flange pipes used in petrochemical plants; forged cast parts, vapor production plants, preheaters and heaters, boiler and pressure vessels and pipe connections are among some application areas where AS DA-777 is used. It can also be used in welding similarly alloyed cementation steels, heat treatable steels and cast steels. Part should be preheated before welding to avoid the cracking risk and operating temperature during welding should not exceed 300°C.  

Creep Resistant Steels :
DIN: 26 CrMo 7 (1.7259)
DIN: 24 CrMo 10 (1.7273)
DIN: 10 CrMo 11 (1.7276)
DIN: 16 CrMo 9 3 (1.7281)
DIN: 12 CrMo 9 10 (1.7375)
DIN: 10 CrSiMoV 7 (1.8075)
EN: 10 CrMo 9-10
Cast Steels :
DIN: GS-18 CrMo 9 10 (1.7379)
EN: G17 CrMo 9-10
 

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)
2.50 350   80 - 110   2160 200 4,3
3.25 350   90 - 140   3420 140 4,8
4.00 450 130 - 190   6450 100 6,4
5.00 450 150 - 240 10000   60 6,0
 

Welding Positions

 

Ürün Broşürü (PDF)