ESAB

OK 76.28

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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.


Typical Charpy V-Notch Properties

PWHT
Impact Value 96 ft-lb
Impact Value 130 J
Shielding Gas ISO
1274 °F
690 °C
1 hr
Testing Temperature 68 °F
Testing Temperature 20 °C

Typical Tensile Properties

ConditionElongationShielding GasTensile Strength Testing Temperature Testing TimeYield Strength
PWHT21 %ISO720 MPa (104 ksi)690 degC (1274 degF)1 hr630 MPa (91 ksi)

Deposition Data

Current Deposition Rate @ 90% I max Diameter Deposition Efficiency (%) Number of electrodes/kg weld metal Voltage
55-80 A 40 sec 0.7 kg/h (1,5 lb/h) 2.0 x 300.0 mm (5/64 x 11,8 in.) 58 % 136.0 23 V
70-110 A 52 sec 0.8 kg/h (1,8 lb/h) 2.5 x 300.0 mm (0.098 x 11,8 in.) 58 % 88.0 25 V
95-150 A 62 sec 1.2 kg/h (2,6 lb/h) 3.2 x 350.0 mm (1/8 x 13,8 in.) 59 % 49.0 26 V
130-190 A 88 sec 1.8 kg/h (4,0 lb/h) 4.0 x 450.0 mm (5/32 x 17,7 in.) 64 % 23.0 28 V
150-260 A 92 sec 2.7 kg/h (6,0 lb/h) 5.0 x 450.0 mm (0.197 x 17,7 in.) 64 % 14.5 29 V
200-350 A 90 sec 3.9 kg/h (8,6 lb/h) 6.0 x 450.0 mm (0.236 x 17,7 in.) 64 % 10.5 30 V

Classifications

Classifications SFA/AWS A5.5 : E9018-B3
EN ISO 3580-A : E CrMo2 B 4 2 H5

Approvals

Approvals ABS SR H5*
BV C2M1 H5
CE EN 13479
NAKS/HAKC 2.5-5.0 mm
VdTÜV 00971
Approvals are based on factory location. Please contact ESAB for more information.

Consumable Characteristics

Alloy Type Low alloyed (2.2 % Cr ; 1,1 % Mo)
Coating Type Basic covering
Diffusible Hydrogen < 5ml/100g
Welding Current DC+(-)

Typical Weld Metal Analysis %

Typical Weld Metal Analysis %
C Cr Mn Mo Si
0.06 % 2.2 % 0.7 % 1.1 % 0.3 %
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How to purchase OK 76.28

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Part Numbers and Accessories

Part Numbers : OK 76.28
76282020K0
76282520K0
76283230G0
76284040G0
76285040G0
76286040G0
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