OK 76.96

Mô tả

OK 76.96

OK 76.96 is an LMA electrode containing 9Cr1Mo for the welding of creep-resistant steels. It is especially suitable for pipe welding. The electrode runs with a quiet, stable arc and gives a minimum amount of spatter. A preheating and interpass temperature of 150-260°C is normally required. The mechanical properties stated here are after one hour of heat treatment at 740°C.

Classifications:

SFA/AWS A5.5:E8015-B8, EN ISO 3580-A:E (CrMo9) B 4 2 H5

 

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
Stress relieved 2 hr 650 °C	730 MPa	850 MPa	17 %
Stress relieved 2 hr 750 °C	550 MPa	720 MPa	22 %

 

Typical Charpy V-Notch Properties
Condition	Testing Temperature	Impact Value
ISO
Stress relieved 2 hr 650 °C	20 °C	25 J
Stress relieved 2 hr 750 °C	20 °C	60 J
Stress relieved 2 hr 850 °C	20 °C	80 J

 

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	55-75 A	23 V	0.58	131.0	49 s	0.50 kg/h
2.5 x 300 mm	70-100 A	25 V	0.55	92.0	51 s	0.80 kg/h
3.2 x 350 mm	90-135 A	26 V	0.55	50.0	70 s	1.10 kg/h
4.0 x 450 mm	130-200 A	21 V	0.64	22.5	80 s	1.90 kg/h