AS DA-774

Askaynak

Ürün Broşürü (PDF)

General Description

AS DA-774 is a basic coated electrode. It gives a Cr-Mo alloyed weld metal that is used in the welding of creep resistant pressure vessels and pipe steels operating under high temperatures. AS DA-774 is especially used for 13 CrMo 44 type steels that are frequently used in operating temperatures up to 570°C. It gives a root pass free of porosity with a minimum amount of spatter. It is recommended to use the electrode in DC (+).

 

Classification and Typical Weld Metal Composition

TS EN ISO 3580-A : E CrMo 1 B 12
AWS A5.5 : E8018-B2
C Si Mn Cr Mo  

0,06

0,50

0,80

1,20

0,50

 

 

Mechanical Properties of the Weld Metal, Typical

Yield Strength : 540 (N/mm²)    
Tensile Strength : 620 (N/mm²)    
Elongation (L=5d) : 22 (%)    
Impact (ISO-V)
: 90 (Joule) (+20°C)  
 

Approvals and Certificates

Certificates

GOST

SEPRO

TSE

 

Applications and Materials to be Welded

AS DA-774 is used for the welding of vapor pipes and boiler and pressure vessels that are manufactured from Cr-Mo steels. It can also be used in welding similarly alloyed cementation steels, heat treatable steels and cast steels. It is an ideal electrode in the multi-pass welding of thick sectioned and rigidly restrained mass structures.

Creep Resistant Steels :
DIN: 15 CrMo 3 (1.7205)
DIN: 24 CrMo 5 (1.7258)
DIN: 15 CrMo 5 (1.7262)
DIN: 13 CrMo 4 4 (1.7335)
EN: 13CrMo4-5
DIN: 16 CrMo 4 4 (1.7337)
DIN: 22 CrMo 4 4 (1.7350)
DIN: 13 CrMoV 4 2 (1.7709)
DIN: 16 CrMoV 4 (1.7728)
EN: 25CrMo4
EN: 42CrMo4 *
Cast Steels :
DIN: GS-25 CrMo 4 (1.7218)
EN: G25CrMo4
DIN: GS-22 CrMo 5 (1.7252)
EN: G22CrMo5
DIN: GS-22 CrMo 5 4 (1.7354)
EN: G22CrMo5-4
DIN: GS-17 CrMo 5 5 (1.7357)
EN: G17CrMo5-5
Cementation Steels :
DIN: 15 Cr 3 (1.7015)
EN: 16MnCr5
EN: 20MnCr5

(*) Mekanik değerlere dikkat edilmelidir.

 

Welding Parameters / Packing and Diameter Informations

Current Type and Polarity : DC (+) / AC min. 70V

Diameter
(mm)
Length
(mm)
Current
(Amper)
Electrode Weight
(g/100 pcs)
Quantity
(pcs/box)
Weight
(kg/box)
2.50 350   80 - 100   2030 190 3,9
3.25 350   90 - 140   3270 145 4,7
4.00 450 130 - 190   6420   95 6,1
5.00 450 150 - 240 10000   65 6,5
 

Welding Positions

 

Ürün Broşürü (PDF)