OK Tigrod 318Si

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Bare, corrosion-resistant, stabilised, chromium-nickel-molybdenum wire for welding Cr-Ni-Mo and Cr-Ni stabilised or non-stabilised steels. OK Tigrod 318Si has good general corrosion resistance. The alloy is stabilised with niobium to improve resistance to the intergranular corrosion of the weld metal. The higher silicon content improves the welding properties such as wetting. Due to stabiliation by niobium, this alloy is recommended for service temperatures up to 400°C.

Typical Charpy V-Notch Properties

Impact Value Testing Temperature
as welded
70 J (52 ft-lb) -60 degC (-76 degF)
40 J (30 ft-lb) 20 degC (68 degF)

Typical Tensile Properties

ConditionElongationTensile Strength Yield Strength
As Welded35 %615 MPa (89 ksi)460 MPa (67 ksi)


Wire Electrode Werkstoffnummer : ~1.4576
EN ISO 14343-A : W 19 12 3 Nb Si
SFA/AWS A5.9 : ER318 (mod)


Approvals CE EN 13479
DB 43.039.15
NAKS/HAKC 2.0 mm
VdTÜV 09737
Approvals are based on factory location. Please contact ESAB for more information.

Consumable Characteristics

Alloy Type Austenitic (with approx. 7 % ferrite) 19% Cr - 12% Ni - 3 % Mo - Nb

Typical Weld Metal Analysis %

Typical Weld Metal Analysis %
C Cr Cu Mn Mo Nb Ni P S Si
0.04 % 19 % 0.1 % 1.3 % 2.8 % 0.5 % 12 % 0.02 % 0.01 % 0.8 %
Typical Wire Composition %
0.05 % 18.8 % 0.10 % 1.7 % 2.60 % 0.50 % 11.9 % - - 0.8 %

How to purchase OK Tigrod 318Si

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Part Numbers and Accessories

Part Numbers : OK Tigrod 318Si