OK 76.98

Mô tả

OK 76.98

OK 76.98 is a low-hydrogen electrode for welding modified 9 Cr steels like T91/P91. The electrode is suitable for

all-positional welding in pipes and plates. The mechanical properties stated here are after two hours of heat treatment at 750°C.

 

Classifications:	SFA/AWS A5.5-96:E9015-B9 (nearest), EN ISO 3580-A:E CrMo91 B 4 2 H5
Approvals:	CE EN 13479, Seproz UNA 272580, NAKS/HAKC 2.5-4.0 mm, VdTÜV 07687

Approvals are based on factory location. Please contact ESAB for more information.

 

Welding Current:	DC+
Diffusible Hydrogen:	<5.0 ml/100g
Alloy Type:	Cr-Mo-Ni-V-Nb
Coating Type:	Basic

 

Typical Tensile Properties
Condition	Yield Strength	Tensile Strength	Elongation
ISO
PWHT 755°C 2h	720 MPa	820 MPa	21 %

 

Typical Charpy V-Notch Properties
Condition	Testing Temperature	Impact Value
ISO
PWHT 755°C 2h	20 °C	50 J

 

Typical Weld Metal Analysis %
C	Mn	Si	Ni	Cr	Mo	V	Nb
0.1	0.8	0.35	0.7	9	1	0.24	0.06

 

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
2.5 x 350 mm	70-100 A	21 V	0.66	71.4	56 s	0.90 kg/h
3.2 x 350 mm	90-135 A	22 V	0.60	45.5	68 s	1.20 kg/h
4.0 x 450 mm	130-200 A	23 V	0.64	22.6	85 s	1.90 kg/h