Que hàn đắp DCr250

Liên hệ

  • Welding steel having Cr content up to 0.7 %
  • Welded joints having hardness up to 280 HB, abrasion resistance and less heat erosion
  • Suitable for gear, chain, etc.
  • Able to process and cut

Applied standards

  • JIS: Z3251 DF2A – 250-B

Characteristics – applications: 

  • DCr – 250 is the fillet electrode having Cr content of 0.5 ~ 0.7 %. High deposition coefficient and abrasion resistance.
  • Suitable for welding the abraded details having hardness up to 280 HB such as gear, drum, chain gear, etc. After welding, able to process and cut.

Chemical composition (%):

C Mn Cr P S
Required Not required ≤ 0.03 ≤ 0.03
Obtained 0.15 ~ 0.2 0.4 ~ 0.5 0.5~ 0.7 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 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