OK 76.28

Mô tả

OK 76.28

OK 76.28 is an LMA electrode for welding creep-resistant steels containing approx. 2.25Cr1Mo. The electrode runs with a quiet, stable arc and produces a minimum of spatter loss. OK 76.28 deposits a weld metal with good cracking resistance. The scaling temperature of the weld metal is about 625°C.

 

Classifications:	SFA/AWS A5.5:E9018-B3, EN ISO 3580-A:E CrMo2 B 4 2 H5
Approvals:	CE EN 13479, NAKS/HAKC* 2.5-5.0 mm, VdTÜV 00971, ABS SR H5, BV C2M1 H5

*NAKS/HACK: valid for lot numbers starting with SB. Approvals are based on factory location. Please contact ESAB for more information.

 

Welding Current:	DC+(-)
Diffusible Hydrogen:	<5ml/100g
Alloy Type:	Creep-resisting
Coating Type:	Lime Basic

 

Typical Tensile Properties
Condition	Yield Strength	Tensile Strength	Elongation
ISO
PWHT 690°C 1h	630 MPa	720 MPa	21 %

 

Typical Charpy V-Notch Properties
Condition	Testing Temperature	Impact Value
ISO
PWHT 690°C 1h	20 °C	130 J

 

Typical Weld Metal Analysis %
C	Mn	Si	Cr	Mo
0.06	0.7	0.3	2.3	1.1

 

Deposition Data
Diameter	Current	Voltage	kg weld metal/ kg electrodes	Number of electrodes/kg weld metal	Fusion time per electrode at 90% I max	Deposition rate 90% I max
2.0 x 300 mm	55-80 A	23 V	0.58	136.0	40 s	0.7 kg/h
2.5 x 300 mm	70-110 A	25 V	0.58	88.0	52 s	0.8 kg/h
3.2 x 350 mm	95-150 A	26 V	0.59	49.0	62 s	1.2 kg/h
4.0 x 450 mm	130-190 A	28 V	0.64	23.0	88 s	1.8 kg/h
5.0 x 450 mm	150-260 A	29 V	0.64	14.5	92 s	2.7 kg/h
6.0 x 450 mm	200-350 A	30 V	0.64	10.5	90 s	3.9 kg/h