4
*Air
Hardening AC or
DC Reverse Polarity Electrode All-State®
Air Hardening Electrodes are designed for applications such as: cold extrusion
dies, blanking dies, drawing
dies and rings, hot trimming dies, burnishing rolls, etc. High carbon/high chromium
tool steel is seldom used
where shock is a prime factor due to its tendency to fatigue failure. However,
the deposit of All-State® Air
Hardening Electrodes does not have
this fatigue characteristic and may be used to make repairs to the high
carbon/high chromium types.
Properties of Weld Metal
Deposits are wear resisting, sound,
porous free and may be annealed, reheat-treated, drawn or tempered to a
wide range of desired hardness: 45-50
Rc as-welded for base metal AISI types A2 through A6 and 38-42 Rc
as-welded for AISI types D-2 through
D-5. Heat Treatment
Anneal 1500°-1600°F (816°-871°C).
Harden 1750°-1850°F (954°-1010°C). Quench in air. Draw 300°-1000°F
(149°-538°C).
Procedure Follow
recommended welding procedure pages 2 and 3 with special attention to preheating.
When repairing the 5%
chrome steel types (A-2/A-8) or in composite fabrication, preheat to 400°-500°F
(204°-260°C). Postheating
or Tempering Temper
to desired hardness or toughness to withstand condition to which the unit will
be subjected. For maximum toughness
in the weld deposit, temper at 900°F (482°C). Diameters
and Recommended Amperages 3/32"
(2.4mm)—60-90 1/8"
(3.2mm)—75-125 5/32"
(4.0mm)—100-150
