Que hàn đắp DMn 250-VD

Liên hệ

  • Welding steel having Mn content up to 3 %
  • Welded joints having hardness up to 280 HB and abrasion resistance
  • Suitable for gear, chain, etc.
  • Able to process and cut

Characteristics – applications: 

  • DMn-250 is the electrode having high Mn content. High deposition coefficient and abrasion resistance.
  • Suitable for welding the abraded details having hardness of 250 HB. After welding, able to process and cut.

Chemical composition (%):

C Mn Si P S
Required Not required ≤ 0.03 ≤ 0.03
Obtained – – – 0.025 0.020

Mechanical property of weld metal:

Hardness (HB)
Obtained 250-280

Instructions for use:

  • Clean oil, grease and dust before welding
  • Dry the electrode at 200 ~350 0 C for 30 ~60 minutes before welding
  • Keep arc as soon as possible
  • Process welding edges as regulated
  • Select appropriate welding current to avoid possible defects
  • Use direct current – positive electrode for welding (DC+)
  • Size of the electrode and used current:
Diameter (mm) Φ 3.2 Φ 4.0 Φ 5.0
Length (mm) 350 400 400
Amperage (A) 120~140 170~200 200~240