Premium Metal Cored, Wear Facing Wire Formulated to Work With or Without Shielding Gas Protection ®
EnDOtec DO*390N
WIRE • Superior single-pass wear resistance • Highest single-pass hardness • Highly resistant to ultra-fine particle abrasion • Unique sub-microstructure with nano-like properties for enhanced anti-wear • A cost-effective alloy compared to tungsten carbide welding wires • Low friction properties for best sliding properties • Second-pass hardness over 70 HRC • High hot hardness values up to 1400°F
DESCRIPTION:
PROCEDURE FOR USE:
EnDOtec 390N is the newest development in cored wire technology. A new generation of wearfacing products based on the science and engineering of ultra-fine, submicron grain structures. Weld deposits have a high volume fraction of ultra-hard borocarbides distributed in a mesomorphous* iron-alloy matrix. A transformation phase relating to, or existing in, a state of matter typically intermediate between a liquid and a crystal phase i.e. not fully crystalline or fully amorphous. Designed to work with or without shielding gas protection.
Power-Source Type: EnDOtec DO*390N is compatible with most conventional constant voltage/constant potential (CC/CV) power sources, including programmable & pulsedarc units. Note: Integrated wire feeders should be set up with a 4-roll, knurled-drive wire system, and the gun cable liner, with either a Teflon® or polyamide liner to reduce wire drag.
TYPICAL ANTI-WEAR APPLICATIONS & INDUSTRIES:
Preheating Guide: The carbon & alloy content of the part to be welded normally dictates preheating levels. The ease at which a part air-hardens (air-hardenability) is also a critical point. Other considerations are workpiece size, thickness, and shape.
APPLICATIONS and INDUSTRIES • Auger screws • Press screws • Mixer paddles & blades • High pressure conveyors
• Trencher tool holders • Exhaust fans • Furnace chutes • Kiln mixers
• Cement • Foundries • Aggregate production • Open-pit mining
• Waste recycling • Chemical processing • Trencher operations • Underground mining
Buttering Layer Guide:To minimize any microfissuring tendencies, the use of an underlay is often a practical advantage. When welding manganese steel castings, or steels with a high hardenability, EnDOtec DO*68S or DO*29S offer an ideal cushion layer to further optimize the wear resistance of EnDOtec DO*390N.
TECHNICAL DATA: • Hardness 1-pass deposit: 66-68 HRC • Hardness 2-pass deposit: 67- 71 HRC • Temperature limit: ~1400°F (~750°C) • Carbide type: ~ Complex borocarbide • Relative wear resistance (ASTM G65 Tests): ~9.3 mm³ 1st pass, ~3.8mm³ 2nd pass • Complex carbide alloy: ~16mm³ 2nd pass • AISI Type D2 tool steel ~35mm³ Table I
Base Metal Preparation: Parts to be welded should be free of oil or grease. For optimum results a light grind to remove scale or other surface contamination, is advised.
Welding Technique: As indicated in Table 1 notes, there are certain advantages in using either a “push” or “pull” method during welding. For most downhand welding the pull method is suggested with the wire positioned at a 70º-80º angle. This will provide a clean, virtually spatter-free, high-crowned weld deposit. Note: If a second pass is required it should follow while the weld metal is still hot.
Parameter Table - EnDOtec DO*390N 1/16" (1.6 mm) & 0.045” (1.2mm) Diameter
• Base Metal
Carbon Steels
Alloy Steels
Cast Irons
Stainless Steels
• Welding Position • Shielding Gases
Pull Technique
Pull Technique
Pull Technique
Pull Technique
a) 98% Ar + 2% O2 b) 75% Ar + 25% CO2 b) 90% Ar + 10% CO2
98% Ar + 2% O2 75% Ar + 25% CO2 90% Ar + 10% CO2
98% Ar + 2% O2 75% Ar + 25% CO2 90% Ar + 10% CO2
98% Ar + 2% O2 75% Ar + 25% CO2 90% Ar + 10% CO2
a) Recommended gas mixture b) Alternative gas mixture
• Flow Rates 30-35 scfh 16-l/min 30-35 scfh 30-35 scfh 30-35 scfh • Current/Polarity DCEP (+) DCEP (+) DCEP (+) DCEP (+) • Wire Extension 0.045": ½" ± 1/8" 1/16": ¾" ± 1/8" • Amperage Range (.045”) 130 160 190 ( 1/16”) 170 210 250 • Voltage Range 25 26 28 25 27 28 • Wire Speed (inch/min.) 225 340 445 155 195 245 • Coverage Data 5.5/lbs will cover 1ft2 x 1/8" thick 2.5/kg will cover 0.092 meter2 x 3.2mm thick
Base Metal
Preheat Range °F °C
Mild steels Manganese steel castings¹ Stainless steels¹ Medium carbon steels High carbon steels Cast iron (G/SG/D/M)² Low alloy steels Medium alloy steels High alloy steels (HSLA)
N/A N/A N/A 210-350 390-620 400-500 150-250 200-300 200-350
N/A N/A N/A 100-175 200-325 200-260 65-120 100-150 100-180
1) Preheat to 200°F during cold weather ~35°F. 2) Gray, spheroidal graphite, ductile, malleable types
Note 1 - Welding Technique Influences: A "push technique" will tend to minimize dilution but will increase the amount of spatter. A "pull technique" will, on the other hand, minimize spatter and produce a more high-crowned weld deposit profile. Note 2 - Shielding Gas Influences: It was observed that the 98% Ar + 2% O2 shielding gas influenced the as-deposited hardness by increasing it a marginal amount when compared to shielding gas Note 3 - Base Metal Influences: Although the molten weld metal pool is quite fluid, deposits on cast iron tend to be less wide with good height build-up…on cast iron expect typical transverse relief checking. Note 4A - Amperage Influences: As would be expected, lower-end amperages will produce higher-crowned weld deposit with reduced dilution. Conversely, higher-end amperages will tend to flatten the weld deposit and increase penetration profiles and related dilution. Both deposit modes will exhibit stress-relieving microfissures. Note 4B - Amperage Range Restrictions: Please note that we have refined the amperage & voltage ranges, as these are very critical in achieving the highest wear resistance in the weld deposit.
YOUR RESOURCE FOR PROTECTION, REPAIR AND JOINING SOLUTIONS Eutectic Corporation N94 W14355 Garwin Mace Drive Menomonee Falls, WI 53051 USA P 800-558-8524 • F 262-255-5542 www.eutecticusa.com
Eutectic Canada 428, rue Aime Vincent Vaudreuil-Dorion, Quebec J7V 5V5 Phone: (800) 361-9439 Fax: (514) 695-8793 www.eutectic-na.com
Eutectic Mexico KM 36.5 Autopista Mexico-Quertaro 54730 Cautitlan-Izcalli Estado de Mexico, Mexico Phone: 011 (52) 55-5872-1111 e-mail: eutectic.mexico@eutectic.com.mx
Statement of Liability: Due to variations inherent in specific applications, the technical information contained herein, including any information as to suggested product applications or results, is presented without representation or warranty, expressed or implied. Without limitation, there are no warranties of merchantability or of fitness for a particular purpose. Each process and application must be fully evaluated by the user in all respects, including suitability, compliance with applicable law and non-infringement of the rights of others, and Eutectic Corporation and its affiliates shall have no liability in respect thereof. DO390N 02-16-10© 2008, Eutectic Corporation, ® Reg. T.M., Printed in the U.S.A.