Low Hydrogen

7/29/2019 Low Hydrogen

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Stub Loss Correction Tablefor Coated Electrodes

2" 3" 4" 5"Deposition (50 mm) (75 mm)(100 mm)(125 mm)Efficiency STUB STUB STUB STUB

12" (300 mm) Electrode60% 50.0% 45.0% 40.0% 35.0%65% 54.2% 48.7% 43.3% 37.9%70% 58.3% 52.5% 46.6% 40.8%75% 62.5% 56.2% 50.0% 43.7%80% 66.6% 60.0% 53.3% 46.6%

14" (350 mm) Electrode60% 51.4% 47.1% 42.8% 38.5%65% 55.7% 51.1% 46.4% 41.8%70% 60.0% 55.0% 50.0% 45.0%75% 64.3% 58.9% 53.6% 48.2%80% 68.5% 62.8% 57.1% 51.4%

18" (450 mm) Electrode60% 53.3% 50.0% 46.6% 43.3%

65% 57.7% 54.2% 50.5% 46.9%70% 62.2% 58.3% 54.4% 50.5%75% 66.6% 62.5% 58.3% 54.2%80% 71.1% 66.6% 62.2% 57.7%

Electrode Dimension Conversion Chart

Diameter LengthInches m m Inches m m

5/64 2.0 12 3003/32 2.4 12 300

1/8 3.2 14 350

5/32 4.0 14 3503/16 4.8 14 3507/32 5.6 18 450

1/4 6.4 18 4505/16 8.0 18 450

Atom ArcThe Original Iron Powder LowHydrogen ElectrodeAtom Arc low hydrogen electrodes are available in a

variety of strengths and chemical analyses for weldingalmost every type of mild and low alloy steel. With theintroduction of these iron powder electrodes, fabricatorscan increase productivity while reducing overall weldingcost.

Moisture resistant coatings are incorporated in all AtomArc electrodes. The flux coatings are manufacturedto effectively resist moisture pick-up in opened contain-ers. The improved coating provides an extra degree ofreliability, especially for electrodes exposed to highhumidity environments.

Moisture testing results are conducted in accordancewith AWS A5.1 and A5.5 specifications. AWS structuralcode allows a maximum of 0.4% moisture by weight forall E70XX electrodes. Military requirements vary depend-ing on the specific electrode classification*. Althoughmoisture resistant coatings prolong the exposure time,storage and reconditioning should not be eliminated.

Electrode storage and reconditioning should be acommon practice when using low hydrogen electrodes.For this reason, Atom Arc low hydrogen electrodes aremanufactured with moisture levels below 0.15% whenpackaged in hermetically sealed containers.

Unopened containers can be stored safely for anindefinite length of time under normal dry storageconditions. They should be protected from humid air afterthe container is opened by storing at 225F to 300F(107C to 149C), or if the need arises, can be recondi-tioned by baking for one hour at 700F (371C).

Atom Arc Coated ElectrodesDeposition Data and Current Ranges*

Electrode DepositionDiameter Range Optimum Rate lbs./hr. Efficiencyin. (mm) Amperage Amperage (kg/hr) %

E7018, E8018, etc...3/32 (2.4) 70-100 90 1.7 (0.8) 66.3

1/8 (3.2) 90-160 120 2.6 (1.2) 71.690-160 140 2.7 (1.2) 70.9

5/32 (4.0) 130-220 140 3.1 (1.4) 75.0130-220 170 3.8 (1.7) 73.5

3/16 (4.8) 200-300 200 4.9 (2.2) 76.4

200-300 250 5.4 (2.4) 74.67/32 (5.6) 250-350 250 6.5 (2.9) 75.0

250-350 300 7.2 (3.3) 74.01/4 (6.4) 300-400 300 7.7 (3.5) 78.0

300-400 350 8.7 (3.9) 77.0

*Note: Efficiencies for coated electrodes do not include stub loss.

LOW HYDROGEN COVEREDELECTRODES

The ESAB QA Program specifies that all Military orders are processed as Special Orders, and not OTS (off the shelf) items. Onlywire marked and manufactured to the Military is responsive to and acceptable under Military Specification. All requests for informa-tion and placement of orders for materials requiring military approvals must be directed to Customer Service for Quote, minimumquantity, testing charges, and availability of all Military and ASME Code items. In addition, military approvals are dependant uponrequired specification (1D, 1E, etc.), amendment required, level of packaging, package form, restricted/non-restricted copper, ifmechanical properties of weld metal as-deposited are other than specified, what holding time should be used for stress relief, etc.

Therefore, not all wires in all categories can be provided with military certification.


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Atom Arc 7018AWS Class E7018

Conforms to E7018H4R

AC-DCEP (Electrode Positive)

Electrode Imprint Marking: 7018

Code and Specification Data: **AWS A5.1, ASME SFA 5.1Military - MIL-E-22200/1, MIL 7018ABS - AWS A5.1, 2YDet Norske Veritas - 3Y (H10)Lloyds - 3m, 3Ym (H10)CWB-CSA W48

Description:Atom Arc 7018 is an iron powder, low hydrogen moistureresistant electrode. The wider operating ranges andsmooth weld metal transfer minimizes post weld cleanup. This premium quality electrode meets a multitude of

codes and welding specifications.Atom Arc 7018 was developed to weld carbon and lowalloy steels, including a variety of hardenable steels.

Typical Mechanical Properties

Stress Relieved8 hrs.

As Welded @1150F (621C)

Yield Strength, psi (MPa) 68,000 (470) 57,000 (395)Tensile Strength, psi (MPa) 78,000 (540) 71,000 (490)% Elongation in 2" (51 mm) 30 33% Reduction in Area 75.5 77

Typical Charpy V-Notch Impact PropertiesStress Relieved

8 hrs.As Welded @1150F (621C)

Testing Temp. ft.-lbs. (J) ft.-lbs. (J)

-20F (-29C) 168 (228) 193 (262)

Typical Undiluted Weld Metal Analysis (%)

C M n Si P S

0.045 1.10 0.40 0.015 0.014

Preheat:Preheat is generally not required with Atom Arc 7018 toprevent underbead cracking. Preheat should be usedwith hardenable steels to prevent the formation of hardheat-affected zones and eliminate tendencies towardquench cracking on cooling. Preheat may also berequired in welding heavy sections.

Standard Diameters and Packages3/32" (2.4 mm), 1/8" (3.2 mm), 5/32" (4.0 mm), 3/16" (4.8 mm),7/32" (5.6 mm), and 1/4" (6.4 mm) diameters availalble in 5# (2.3 kg)Value Pac, 11# (5 kg) Quad Pac, 50# (22.7 kg) carton, 10 & 50# (4.5& 22.7 kg) HSC

Atom Arc 7018-1AWS Class E7018-1

Conforms to E7018-1H4R


Electrode Imprint Marking: 7018-1

Code and Specification Data: **AWS A5.1, ASME SFA 5.1ABS - AWS A5.1, 3Y (H10)Lloyds - 3m, 3Ym (H10)Det Norske Veritas - 3Y(H10)CWB-CSA W48.1

Description:Atom Arc 7018-1 is an all-position low hydrogen ironpowder electrode that displays exceptional impacts atlow temperatures in both the as welded and stressrelieved conditions. It adequately meets the AWSrequirements

for a minimum of 20 ft.-lbs. (27 J) at -50F (-10C). Thesmooth metal transfer keeps spatter to a minimum, andthe complete slag coverage is designed for easyremoval.

Atom Arc 7018-1 is intended for the wide variety ofcarbon and low alloy steels in the 50 ksi (345 MPa)minimum yield. It is an ideal choice for applications thatrequire impact toughness at low temperatures.


Stress Relieved8 hrs.

As Welded @1150F (621C)

Yield Strength, psi (MPa) 69,000 (475) 58,000 (400)Tensile Strength, psi (MPa) 82,000 (565) 73,000 (505)

% Elongation in 2" (51 mm) 30 33% Reduction in Area 72 72

Typical Charpy V-Notch Impact PropertiesStress Relieved

8 hrs.As Welded @1150F (621C)

Testing Temp. ft.-lbs. (J) ft-lbs. (J)

-50F (-46C) 104 (141) 165 (224)


C Mn Si P S

0.04 1.35 0.32 0.014 0.015

Preheat:Preheat is generally not required with Atom Arc 7018-1 to

prevent underbead cracking. Preheat should be usedwith hardenable steels to prevent the formation of hardheat-affected zones and eliminate tendencies towardquench cracking on cooling. Preheat may also berequired in welding heavy sections.

Standard Diameters and Packages3/32" (2.4 mm) x 11# (5 kg) Quad Pac, 10 & 50# (4.5 & 22.7 kg) HSC1/8" (3.2 mm) x 11# (5 kg) Quad Pac, 10 & 50# (4.5 & 22.7 kg) HSC5/32" (4.0 mm) x 11# (5 kg) Quad Pac, 10 & 50# (4.5 & 22.7 kg) HSC3/16" (4.8 mm) x 11# (5 kg) Quad Pac, 10 & 50# (4.5 & 22.7 kg) HSC7/32" (5.6 mm) x 10 & 50# (4.5 & 22.7 kg) HSC1/4" (6.4 mm) x 10 & 50# (4.5 & 22.7 kg) HSC


HSC = Hermetically Sealed Containers

Recommended Welding Parameters page 6-9.

** Any item requiring approval certification must be special or-


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Atom Arc 7018-SRAWS Class E7018

Conforms to E7018H4R


Electrode Imprint Marking: 7018-SR

Code and Specification Data: **AWS A5.1, ASME SFA 5.1

Description:

Atom Arc 7018-SR is an all-position, iron powder lowhydrogen electrode. The moisture resistance and welderappeal is similar to other Atom Arc electrodes.

Atom Arc 7018-SR was developed to maintain 70 ksi(483 MPa) tensile strength after 16 hours stress relieving.


Stress Relieved

8 hrs. 16 hrs.@1150F @1150F

As Welded (621C) (621C)

Yield Strength, psi (MPa) 69,000 (475) 61,000 (420) 59,000 (410)Tensile Strength, psi (MPa) 83,000 (570) 77,000 (530) 74,000 (510)% Elongation in 2" (51 mm) 32 35 35% Reduction in Area 76 76 77

Typical Charpy V-Notch Impact Properties

Stress Relieved8 hrs. 16 hrs.

@1150F @1150F(621C) (621C)

Testing Temp As Welded ft-lbs. (J) ft-lbs. (J)

-20F (-29C) 114 (195) 133 (180) 185 (250)

Typical Undiluted Weld Metal Analysis (%)C M n Si P S Mo

0.06 1.35 0.35 0.014 0.014 0.10

Standard Diameters and Packages3/32" (2.4 mm) x 10 & 50# (4.5 & 22.7 kg) HSC1/8" (3.2 mm) x 10 & 50# (4.5 & 22.7 kg) HSC5/32" (4.0 mm) x 10 & 50# (4.5 & 22.7 kg) HSC3/16" (4.8 mm) x 10 & 50# (4.5 & 22.7 kg) HSC

Atom Arc 7018-ACAWS Class E7018


Electrode Imprint Marking: 7018AC

Code and Specification Data: **AWS A5.1, ASME SFA 5.1CWB-CSA 48.1

Description:

Atom Arc 7018AC is a product specifically designed tohave optimum arc characteristics when used with ACpower sources having 75 to 80 open circuit voltage.Compared to standard Atom Arc 7018 operating on AC,this electrode will have easier arc starting and restrike, asmoother arc, and lower spatter. It is useable on a widerange of steels.


As Welded

Yield Strength, psi (MPa) 78,000 (540)Tensile Strength, psi (MPa) 86,000 (595)% Elongation in 2" (51 mm) 29% Reduction in Area 72

Typical Charpy V-Notch Impact Properties

As WeldedTesting Temp. ft.-lbs. (J)

-20F (-29C) 46 (62)


C M n Si P S

0.047 0.95 0.30 0.014 0.015

Preheat:

Preheat is generally not required with Atom Arc 7018ACto prevent underbead cracking. Preheat should be usedwith hardenable steels to prevent the formation of hardheat-affected zones and eliminate tendencies towardquench cracking on cooling. Preheat may also be requiredin welding heavy sections.

Standard Diameters and Packages3/32" (2.4 mm) x 5# (2.3 kg) Value Pac, 11# (5 kg) Quad Pac,

10 & 50# (4.5 & 22.7 kg) HSC1/8" (3.2 mm) x 5# (2.3 kg) Value Pac, 11# (5 kg) Quad Pac,

10 & 50# (4.5 & 22.7 kg) HSC5/32" (4.0 mm) x 5# (2.3 kg) Value Pac, 11# (5 kg) Quad Pac,

10 & 50# (4.5 & 22.7 kg) HSC

3/16" (4.8 mm) x 11# (5 kg) Quad Pac

HSC = Hermetically Sealed Containers

** Any item requiring approval certification must be specialordered - Contact ESAB Customer Service


Recommended Welding Parameters page 9.

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