Description
304L stainless steel welding wire is a solid or flux-cored welding material made from 304L stainless steel, mainly used for TIG welding and MIG welding of stainless steel components. Packaging is divided into boxed and spooled types.
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international standards |
Uniform digital code |
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ASTM/AISI |
GB |
EN |
JIS |
S30403 (distinct from 304 S30408)
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ASTM A276-2017 |
(GB/T 20878-2007) |
(JB/T 4237-1992) |
1.4303 |
SUS304L |
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304L |
022Cr19Ni10 |
00Cr19Ni10 |
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Chemical composition
Chemical composition % by mass MAX unless otherwise stated
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Element |
Min% |
Max% |
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C |
- |
0.030 |
|
Si |
- |
1.0 |
|
Mn |
- |
2.0 |
|
P |
- |
0.045 |
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S |
- |
0.015 |
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N |
- |
0.11 |
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Cr |
17.50 |
19.50 |
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Mo |
- |
- |
|
Ni |
8.00 |
10.50 |
|
Others |
- |
- |
Composition characteristics
Carbon (C) ≤ 0.03%
significantly reducing the risk of carbide precipitation during welding and inhibiting intergranular corrosion.
Chromium (Cr) 17.50%–19.50%, nickel (Ni) 9%–13%
forming a stable austenitic structure to ensure corrosion resistance.
No molybdenum (Mo) added, distinguishing it from 316L welding wire, suitable for non-high chloride ion environments.
Alloy Details
Solid welding wire, suitable for TIG/MIG welding, diameter range 0.8-5.0 mm, supplied in coils or straight bars.
Core Advantages:
- No annealing required after welding, reducing production costs.
- High compatibility with 304L base material, avoiding performance degradation caused by differences in carbon content.
Selection Notes:
- Specifically designed for welding 304L stainless steel, it can also be used for transition layer welding of dissimilar steels (such as 304 and carbon steel).
- In chloride-ion environments (e.g., seawater), use 316L welding wire (containing Mo).
- For high-temperature applications (>450°C), use stabilized welding wire (e.g., ER347).
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Storage and Usage Precautions |
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Storage Conditions: |
Keep sealed and dry, at a temperature below 40°C, and avoid contact with carbon steel. |
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Pre-welding Preparation |
Clean oil stains and oxide layers from the weld seam and polish with a stainless steel brush. |
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Gas Protection |
Pure Ar (99.99%) is recommended for TIG welding, while Ar+CO₂ mixed gas is used for MIG welding. |
Application
- Industrial equipment: chemical storage tanks, heat exchangers, food processing pipelines, relying on their resistance to intergranular corrosion.
- Construction and decoration: stainless steel curtain walls, railing welding, resistant to atmospheric corrosion and requiring no post-treatment.
- Medical and equipment: surgical instruments, medical equipment welding, meeting sterile environment requirements.
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