MK TH550-NQ-Ⅱ
Published：2009/12/17
Standard:Railway truck Document# [2005]67 of Ministry of Railway, China
Characteristics:MK TH550-NQ-Ⅱis Ar-rich gas shielded high strength weather resistant steel welding wire. Due to the limited quantity of elements such as Mn、Cr、Ni、Cu in the welding wire, it has high strength and good low temperature toughness, compared to the ordinary weather resistant steel welding wire, it has stronger atmospheric corrosion resistance.
Application:The welding of high strength weather resistant steel plate used in railway locomotives.
Chemical composition(%)
|
C |
Mn |
Si |
S |
P |
Cu |
Cr |
Ni |
|
≤0.10 |
1.20-1.60 |
≤0.60 |
≤0.020 |
≤0.025 |
0.20-0.50 |
0.30-0.90 |
0.20-0.60 |
Typical mechanical properties of deposited metal:
|
Rm(MPa) |
Rp0.2(MPa) |
A(%) |
Akv(-40℃)(J) |
Shielded gas |
|
≥550 |
≥450 |
≥22 |
≥60 |
Ar+20%CO2 |
Diameter and current: (DC＋)
|
Diameter(mm) |
ф0.8 |
ф1.0 |
ф1.2 |
ф1.6 |
|
Current(A) |
50-150 |
50-220 |
80-350 |
150-450 |
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