OK 74.70

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OK 74.70 is an LMA electrode used for welding high strength, low-alloyed steel. The electrode is designed for various applications, including pipelines.

Typical Charpy V-Notch Properties

Impact Value Testing Temperature
as welded iso
120 J (89 ft-lb) -20 degC (-4 degF)
90 J (67 ft-lb) -40 degC (-40 degF)

Typical Tensile Properties

ConditionElongationShielding GasTensile Strength Yield Strength
As Welded25 %ISO650 MPa (94 ksi)550 MPa (80 ksi)

Deposition Data

Current Deposition Rate @ 90% I max Diameter Deposition Efficiency (%) Number of electrodes/kg weld metal Voltage
80-140 A 63 sec 1.14 kg/h (2,5 lb/h) 3.2 x 350.0 mm (1/8 x 13,8 in.) 58 % 50 23 V
80-140 A 91 sec 1.6 kg/h (3,5 lb/h) 3.2 x 450.0 mm (1/8 x 17,7 in.) 61 % 25 23 V
110-190 A 93 sec 1.66 kg/h (3,7 lb/h) 4.0 x 450.0 mm (5/32 x 17,7 in.) 63 % 24 24 V


Classifications SFA/AWS A5.5 : E8018-G
EN ISO 2560-A : E 50 4 Z B 42 H5


Grade 3.2-4.0 mm
Approvals are based on factory location. Please contact ESAB for more information.

Consumable Characteristics

Alloy Type Low alloyed (0.5 % Mo)
Coating Type Basic covering
Diffusible Hydrogen < 5.0 ml/100g
Welding Current DC+(-)

Typical Weld Metal Analysis %

Typical Weld Metal Analysis %
C Mn Mo Si
0.08 % 1.5 % 0.45 % 0.4 %

How to purchase OK 74.70

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Part Numbers and Accessories

Part Numbers : OK 74.70