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Description and Applications |
HM309 is a gas
metal arc welding wire to be used with Ar+0.5∼2.0% O2
shield gas. Arc is stable beaded appearance is beautiful
and its ability to weld is satisfactory. Deposited metal
contains an adequate amount of ferrite and shows
excellent resistance to heat cracking.
Welding of 25% Cr - 12% Ni stainless steels, 18% Nr - 8%
Ni stainless steels, clad steels and dissimilar metal
such as mild steels to stainless steels for petroleum,
chemical engineering and textile industries. |
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Guideline in Usage
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1. |
When
high X-ray quality is required, stable spray
transfer mode should be maintained with a low
current and slow welding speed using a pulsed
arc power source. |
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2. |
In the
welding of dissimilar metals, excessive dilution
deteriorates crack and corrosion resistance.
Care should be taken against the penetration of
the base metal. |
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Typical
Chemical Composition of Weld Metal（％） |
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C |
Si |
Mn |
P |
S |
Cr |
Ni |
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0.05 |
0.35 |
1.74 |
0.020 |
0.070 |
23.6 |
13.3 |
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Typical Mechanical Properties of Weld Metal |
Tensile Strength
N/mm2 |
Elongation
％ |
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620 |
36 |
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Size & Recommended Current Range (AC) |
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0.9 / 1.0 |
1.2 |
1.6 |
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Current (Amp) |
70~300 |
100~350 |
120~350 |
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