ESAB

OK Autrod 318Si

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A continuous solid corrosion resisting stabilized chromium-nickel-molybdenium wire for welding of Cr-Ni-Mo and Cr-Ni stabilized or non-stabilized steels. OK Autrod 318Si has a good general corrosion resistance. The alloy is stabilized with niobium to improve the resistance against intergranular corrosion of the weld metal. The higher silicon content improves the welding properties, such as wetting. Due to stabilization of niobium this alloy is recommended for service temperatures up to 400 °C.

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Typical Charpy V-Notch Properties

as welded

Typical Tensile Properties

Condition As Welded As Welded
Shielding Gas Tested at 400°C.
Tensile Strength 615 MPa (89 ksi) 540 MPa (78 ksi)
Yield Strength 460 MPa (67 ksi) 400 MPa (58 ksi)
Elongation 35 % 35 %

Deposition Data

Current Deposition Rate Diameter Voltage Wire Feed Speed
80-240 A 1.5-6.0 kg/h (3.3-13. lb/h) 1.0 mm (0.040 in.) 15-28 V 4.0-16.0 m/min (157-630 in./min)
100-300 A 1.6-7.5 kg/h (3.5-16. lb/h) 1.2 mm (0.047 in.) 15-29 V 3.0-14.0 m/min (118-551 in./min)
55-160 A 1.0-4.1 kg/h (2.2-9.0 lb/h) 0.8 mm (0.030 in.) 15-24 V 4.0-17.0 m/min (157-669 in./min)

Classifications

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

Approvals

Approvals CE EN 13479
DB 43.039.14
NAKS/HAKC 1.2MM
VdTÜV 09735
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
Shielding Gas M12, M13 (EN ISO 14175)

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 % 0.7 % 12 % 0.015 % 0.010 % 0.8 %
Typical Wire Composition %
0.05 % 18.8 % 0.10 % 1.7 % 2.60 % 0.50 % 11.9 % - - 0.8 %
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Part Numbers and Accessories

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Part Numbers : OK Autrod 318Si
1631089820 Find a distributor
1631109820 Find a distributor
1631109320 Find a distributor
1631129820 Find a distributor

ESAB EQUIPMENT WARRANTIES ARE VALID ONLY WHEN PURCHASED THROUGH AN ESAB AUTHORIZED DEALERSHIP.

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