CHINA ELECTRODE AND MACHINERY CO., LTD.

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Hard Surfacing Arc Welding Electrodes

CH-M

CNS EHMA-B
JIS DFMA-B

DescriptionG

Its weld metal is 13%Mn steel and becomes austenitic by water cooling during welding. Accordingly it has excellent toughness and high work-hardening property. So CH-M is suitable for surfacing of the parts subjected to heavy impact abrasion. Machining of the weld metal is difficult due to its high work-hardening property.

Application :

Hard surfacing of various crusher jaws, high manganese steel rails and high manganese cast steels.

Instructions for welding :

  1.  Avoid the continuous welding and it is recommended to water cooling during welding.

  2. It is necessary to under lay with austenitic stainless steel in such case when the base metal is not 13% manganese steel.

  3. When the base metal of 13% manganese steel is hardened, remove it before welding.

  4. Dry the electrodes at 150 ~ 200J for 30~60 minutes before use.
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Typical weld metal propertiesG (Weld Metal Analysis)

Carbon KKKKKKKKKKKKKKKKKKKKKK 0.70
Manganese KKKKKKKKKKKKKKKKKKKK 13.2
Silicon KKKKKKKKKKKKKKKKKKKKKK 0.72
Chromium KKKKKKK..KKKKKKKKKK.KKK -----
Molybdenum KKKKKKKKKKKKKKKKKKK.. -----
Vanadium KK..KKKKKKKKKKKKKKKKKK...-----
Tungsten KKKKKKKKKKKKKKKKKKKKK. -----

Hardness of weld metal:

As welded: 200 V.H.N. ; After work-hardening: 500~600 V.H.N.

Available diameter and recommended operating rangesG
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@ F. & H. V fillet @
3.2 X350 m/m
4.0 X400 m/m
5.0 X400 m/m
  90 ~ 130 Amps
140 ~ 180 Amps
190 ~ 250 Amps

 

Type of powerGA.C. or D.C.E.P.
ApprovalsG

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Last modified: 2007-10-09