Akura AVLCD37700-HDS Manual de usuario descargar pdf (Pagina 7)

MAG WELDING SPECIFICATIONS FOR 590-980 MPa HIGH-STRENGTH STEEL PARTS

NOTE: In this publication and the body repair manuals,

gas metal arc welding (GMAW) is referred to by its

subtypes depending on the welding/brazing

requirements:

•

MIG welding/brazing = Metal inert gas welding or

brazing where 100% Argon (Ar) shielding gas is

used. Argon is inert and does not react with the

molten weld pool or brazing operation.

• MAG welding = Metal active gas welding where

the shielding gas being used contains a mixture of

80% Argon (Ar) and 20% Carbon Dioxide (CO

It is considered active because the CO

undergoes

a limited reaction with the molten weld pool.

The body repair manual specifies the weld types and

locations for each body panel:

• The welding wire used must have a tensile strength

equal to, or greater than, the lowest tensile strength

of the parts being welded. This conversion chart

shows the relationship of steel tensile strength (MPa)

to the minimum welding wire tensile strength (ksi).

• Refer to the diagrams shown below:

Steel Tensile (MPa) Wire Tensile (ksi)

590 ≥86

780 ≥113

980 ≥142

(1,000 psi = 1 ksi)

7 of 10

Parts made of High Strength Steel (590-980 MPa)

must be installed as a complete part. No sectioning is

allowed unless a procedure is provided in the body

repair manual. This high-strength steel requires

special welding equipment, procedures and settings.

See the welding section of the appropriate body repair

manual. Failure to use the proper equipment or follow

the proper procedures can result in an unsafe repair.

Important Information

MAG PLUG WELDING GUIDELINES

• MAG plug welding may be done when joining body

omponents to 590-980 MPa steel parts.

• Follow the recommendations described in the body

repai

r manual section “MAG welding specifications

for high-strength steel parts 590 MPa and higher.”

MAG BUTT WELDING GUIDELINES

•

MAG butt welding may only be done on steel parts

with a tensile strength of 590 MPa and lower.

• Welding speed is critical to achieve the correct weld

strength and minimize the heat affected zone (HAZ).

• Follow the recommendations described in the body

repai

r manual section “MAG welding specifications

for high-strength steel parts 590 MPa and higher.”

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Akura AVLCD37700-HDS Manual de usuario Pagina 7

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