Welding Electrode
E320-16 Stainless Steel Welding Electrode
E320-16 is a high-alloy austenitic stainless steel welding electrode for severe corrosion-resistant applications. It is classified under AWS A5.4 E320-16 and GB/T 983 E320-16, and is commonly supplied as A902 E320-16. With a Cr-Ni-Mo-Cu-Nb weld metal, E320-16 is mainly used for Carpenter 20Cb, Alloy 20, and similar corrosion-resistant alloys, particularly in chemical processing and sulfuric acid service.
Product Specifications
Item | Specification |
|---|---|
Product Grade | A902 |
Classification | E320-16 |
AWS Standard | AWS A5.4 E320-16 |
GB/T Standard | GB/T 983 E320-16 |
JIS | JIS Z 3221 ES320 |
Weld Metal | Cr-Ni-Mo-Cu-Nb Austenitic Alloy |
Coating | Titanium-Calcium |
Welding Current | AC / DC+ |
Typical Diameters | 2.0, 2.5, 3.2, 4.0, 5.0 mm |
Base Materials
E320-16 is primarily selected for:
- Carpenter 20Cb / Alloy 20
- 20Cb-3 corrosion-resistant alloy
- E320-type stainless steel
- Similar Cr-Ni-Mo-Cu-Nb alloys
- Selected matching-composition cast and wrought alloys
For critical service, filler metal selection should consider the base material, chemical medium, concentration, temperature, and approved welding procedure.
Typical Applications
E320-16 welding electrodes are used for severe corrosion-resistant welding, including:
- Sulfuric acid processing equipment
- Chemical processing vessels and tanks
- Corrosion-resistant piping
- Phosphoric acid equipment
- Petrochemical process equipment
- Alloy 20 / Carpenter 20Cb maintenance and repair
E320-16 is particularly suitable when an E320-type filler metal is specified for Alloy 20 or similar high-alloy materials.
Chemical Composition
Typical GB/T 983 requirements for deposited weld metal:
Element | Requirement |
|---|---|
C | ≤ 0.07% |
Mn | 0.50–2.50% |
Si | ≤ 0.60% |
Cr | 19.0–21.0% |
Ni | 32.0–36.0% |
Mo | 2.0–3.0% |
Cu | 3.0–4.0% |
Nb | 8 × C–1.00% |
P | ≤ 0.040% |
S | ≤ 0.030% |
Mechanical Properties
Property | Minimum Requirement |
|---|---|
Tensile Strength | ≥ 550 MPa |
Elongation | ≥ 28% |
Actual chemical composition and mechanical properties should be confirmed by the applicable product standard and MTC.
Welding Current
Diameter | Reference Current |
|---|---|
2.0 mm | 40–80 A |
2.5 mm | 50–100 A |
3.2 mm | 70–130 A |
4.0 mm | 100–160 A |
5.0 mm | 140–200 A |
A902 E320-16 supports AC and DC+ welding. Welding parameters should be adjusted according to diameter, position, joint design, and the manufacturer's TDS.
FAQ
What is E320-16 welding electrode?
E320-16 is a high-alloy stainless steel electrode designed mainly for Alloy 20, Carpenter 20Cb, and similar corrosion-resistant alloys.
What is A902 E320-16?
A902 is the GB/T product designation commonly used for E320-16 stainless steel welding electrodes.
Can E320-16 weld Alloy 20?
Yes. E320-16 is specifically used for Alloy 20 / Carpenter 20Cb and similar materials.
Is E320-16 suitable for sulfuric acid equipment?
Yes. E320-type weld metal is designed for severe corrosion applications, including sulfuric acid environments, subject to the specific chemical concentration and service conditions.
Supply from GD WELD
GD WELD supplies E320-16 stainless steel welding electrodes, including A902 E320-16, for chemical processing, corrosion-resistant equipment, maintenance, repair, and export applications.
For quotation, please provide the diameter, quantity, base material, applicable standard, packaging requirements, and destination market.
