Welding Electrode
A402 E310-16 Stainless Steel Welding Electrode
A402 E310-16 is a Cr26Ni21 pure austenitic stainless steel welding electrode with a rutile-type coating. It is classified under GB/T 983 E310-16 and AWS A5.4 E310-16. Designed for heat-resistant stainless steel and high-temperature welding, A402 provides good welding performance and oxidation resistance at elevated temperatures. It can be used with both AC and DC+ welding current.
Product Specifications
Item | Specification |
|---|---|
Product Grade | A402 |
Classification | E310-16 |
GB/T Standard | GB/T 983 |
AWS Standard | AWS A5.4 E310-16 |
ISO Classification | ISO 3581-A E 25 20 R 3 2 |
Weld Metal | Cr26Ni21 Austenitic Stainless Steel |
Coating | Rutile Type |
Welding Current | AC / DC+ |
Typical Diameter | 2.5, 3.2, 4.0, 5.0 mm |
Base Materials
A402 E310-16 is commonly selected for welding:
- 25Cr-20Ni heat-resistant stainless steel
- AISI 310 and 310S stainless steel
- Other similar austenitic heat-resistant stainless steels
- High-hardenability chromium steels
- Selected carbon steel and stainless steel combinations
- Selected dissimilar steel joints for elevated-temperature service
A402 is particularly relevant when the welding specification calls for an E310-16 stainless steel electrode.
Typical Applications
A402 E310-16 is used in high-temperature industrial applications such as:
- Furnace equipment and furnace linings
- Furnace grates and burners
- Heat-resistant stainless steel components
- Petrochemical and chemical processing equipment
- High-temperature vessels and industrial equipment
- Repair of 310-series stainless steel
- Selected dissimilar steel welding
The Cr26Ni21 weld metal provides good resistance to oxidation at elevated temperatures. Manufacturer data commonly specifies applications in the 900–1100°C range, depending on service conditions and welding procedure.
Deposited Weld Metal
Typical GB/T 983 requirements for E310-16 are:
Element | Requirement |
|---|---|
C | 0.08–0.20% |
Mn | 1.00–2.50% |
Si | ≤ 0.75% |
Cr | 25.0–28.0% |
Ni | 20.0–22.5% |
Mo | ≤ 0.75% |
Cu | ≤ 0.75% |
P | ≤ 0.030% |
S | ≤ 0.030% |
Mechanical Properties
Property | Minimum Requirement |
|---|---|
Tensile Strength | ≥ 550 MPa |
Elongation | ≥ 25% |
Actual chemical composition and mechanical properties should be confirmed by the applicable product standard and MTC.
Welding Current
A402 supports AC and DC+ operation. DC+ is generally preferred where better welding control is required.
Diameter | Reference Current |
|---|---|
2.5 mm | 50–100 A |
3.2 mm | 70–130 A |
4.0 mm | 100–160 A |
5.0 mm | 140–200 A |
For high-temperature stainless steel welding, use a relatively low current and short arc to help control heat input. Electrodes should be properly dried before welding according to the manufacturer's technical requirements.
Why Choose A402 E310-16?
A402 is a practical choice when the application requires an E310-16 stainless steel welding electrode with:
- Cr26Ni21 austenitic weld metal
- Good oxidation resistance at elevated temperatures
- Rutile-type coating with good welding performance
- AC / DC+ welding capability
- Compatibility with 310-series heat-resistant stainless steels
- Applications in furnace, petrochemical, and other high-temperature equipment
A402 E310-16 FAQ
What is A402 welding electrode?
A402 is a Cr26Ni21 pure austenitic stainless steel welding electrode classified as E310-16 under GB/T 983 and AWS A5.4.
What is A402 E310-16 used for?
It is mainly used for 310-series and other heat-resistant stainless steels, furnace equipment, high-temperature components, and selected dissimilar steel applications.
Can A402 weld AISI 310 stainless steel?
Yes. E310-16 electrodes are commonly used for AISI 310, 310S and similar 25Cr-20Ni heat-resistant stainless steels.
Can A402 be used with AC?
Yes. A402 E310-16 can operate with AC or DC+, with DC+ generally preferred for welding control.
Supply from GD WELD
GD WELD supplies A402 E310-16 stainless steel welding electrodes for industrial fabrication, maintenance, repair, and export applications.
For quotation, please provide the required diameter, quantity, applicable standard, packaging, and destination market. MTC and technical documentation can be supplied according to order requirements.
