OK Autrod 318Si
A continuous, solid, corrosion-resistant, stabilised, chromium-nickel-molybdenum wire for welding Cr-Ni-Mo and Cr-Ni stabilised or non-stabilised steels. OK Autrod 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 stabilisation by niobium, this alloy is recommended for service temperatures up to 400ºC.
Typical Charpy V-Notch Properties
| Impact Value | Testing Temperature | |||
| as welded | ||||
| 70 J (52 ft-lb) | -60 degC (-76 degF) | |||
| 100 J (74 ft-lb) | 20 degC (68 degF) | |||
Typical Tensile Properties
| Condition | As Welded | As Welded |
| Shielding Gas | Tested at 400°C. | |
| Tensile Strength | 615 MPa (89 ksi) | 480 MPa (70 ksi) |
| Yield Strength | 460 MPa (67 ksi) | 360 MPa (52 ksi) |
| Elongation | 35 % | 35 % |
Deposition Data
| Current | Deposition Rate | Diameter | Voltage | Wire Feed Speed |
| 55-160 A | 1.0-4.1 kg/h (2-9 lb/h) | 0.8 mm (0.030 in.) | 15-24 V | 4.0-17.0 m/min (157-669 in./min) |
| 80-240 A | 1.5-6.0 kg/h (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 (3-16 lb/h) | 1.2 mm (0.047 in.) | 15-29 V | 3.0-14.0 m/min (118-551 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 |
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 % | |||||
Part Numbers and Accessories
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