Welding Electrode
A502 E16-25MoN-16 Welding Electrode
A502 E16-25MoN-16 is a Cr-Ni-Mo austenitic stainless steel welding electrode for dissimilar metal welding and difficult steel repair. It is classified under GB/T 983 and is commonly used for stainless steel to carbon or low-alloy steel joints. With a titanium-calcium coating and AC/DC+ welding capability, A502 is suitable for industrial welding, maintenance, and repair applications involving hardened, quenched, and dissimilar steels.
A502 E16-25MoN-16 Welding Electrode
A502 E16-25MoN-16 is a Cr-Ni-Mo austenitic stainless steel welding electrode for dissimilar metal welding and difficult steel repair.
It is commonly used for stainless steel to carbon steel, stainless steel to low-alloy steel, and hardened or quenched steel applications.
Product Specifications
Item | Specification |
|---|---|
Chinese Grade | A502 |
Classification | E16-25MoN-16 |
Standard | GB/T 983 |
Product Type | Stainless Steel Welding Electrode |
Weld Metal | Cr-Ni-Mo Austenitic Stainless Steel |
Coating | Titanium-Calcium |
Current | AC / DC+ |
Diameters | 2.5, 3.2, 4.0, 5.0 mm |
Packaging | Standard Export or Customized |
Typical Applications
A502 is suitable for:
- Stainless steel to carbon steel welding
- Stainless steel to low-alloy steel welding
- Dissimilar metal joints
- Hardened and quenched steel welding
- Difficult repair welding
- Rigid steel structures
- Industrial maintenance
It is also commonly associated with welding quenched low- and medium-alloy steels such as 30CrMnSi.
Chemical Composition of Deposited Metal
Element | Requirement |
|---|---|
C | ≤ 0.12% |
Mn | 0.50–2.50% |
Si | ≤ 0.90% |
S | ≤ 0.030% |
P | ≤ 0.035% |
Cr | 14.0–18.0% |
Ni | 22.0–27.0% |
Mo | 5.0–7.0% |
Cu | ≤ 0.75% |
N | ≥ 0.10% |
Values refer to deposited weld metal. Actual product chemistry should be confirmed against the applicable standard and batch MTC.
Mechanical Properties
Property | Requirement |
|---|---|
Tensile Strength | ≥ 610 MPa |
Elongation | ≥ 30% |
MTC documentation can be provided according to customer requirements.
A502 vs. A507
A502 and A507 have similar Cr-Ni-Mo weld metal and overlapping applications, but their classifications and welding characteristics are different.
| A502 | A507 |
|---|---|---|
Classification | E16-25MoN-16 | E16-25MoN-15 |
Coating | Titanium-Calcium | Basic |
Current | AC / DC+ | DC+ |
For applications where AC welding capability is required, A502 may be considered. The final selection should follow the welding procedure, base materials, power source, and project specification.
Is E16-25MoN-16 an AWS Classification?
No. E16-25MoN-16 is a GB/T 983 classification.
It should not automatically be assigned an AWS A5.4 equivalent without supporting technical documentation. International buyers should specify the required standard and classification when requesting a quotation.
FAQ
What is A502 welding electrode?
A502 is the Chinese grade for GB/T 983 E16-25MoN-16, a Cr-Ni-Mo austenitic stainless steel welding electrode.
What is E16-25MoN-16 used for?
It is mainly used for dissimilar metal welding, stainless steel to carbon or low-alloy steel welding, and repair of hardened or quenched steels.
Can A502 weld stainless steel to carbon steel?
Yes. A502 is commonly used for stainless steel to carbon steel and other dissimilar steel joints.
Can A502 be used with AC?
Yes. A502 E16-25MoN-16 is designed for AC or DC+ welding.
What is the difference between A502 and A507?
A502 is E16-25MoN-16 with a titanium-calcium coating and AC/DC+ capability. A507 is E16-25MoN-15 with a basic coating and DC+ welding.
A502 E16-25MoN-16 Welding Electrode Supplier
GD WELD supplies A502 E16-25MoN-16 welding electrodes for industrial welding, maintenance, repair, and export applications.
Available diameters, packaging, MTC documentation, and other specifications can be discussed according to your requirements.
Send us your diameter, quantity, base material, application, and required specification for a quotation.
