Low Alloy & High Strength
ER80S-D2
ER80S-D2 welding wire is an AWS A5.28 low-alloy solid welding wire containing nickel and molybdenum, designed for compatible low-alloy steels requiring good strength and low-temperature impact toughness. ER80S-D2 is a Ni-Mo alloyed low-alloy welding wire designed for compatible low-alloy steels in demanding applications. With a controlled nickel and molybdenum alloy system, it is used where good weld-metal strength, toughness and low-temperature performance are required.
ER80S-D2 Welding Wire
ER80S-D2 is an AWS A5.28 nickel-molybdenum alloyed solid welding wire designed for compatible low-alloy steels where strength and toughness are important.
The D2 classification belongs to the Ni-Mo low-alloy welding consumable family.
Compared with conventional carbon-steel welding wires, ER80S-D2 provides a controlled alloy system intended for applications where weld-metal chemistry and mechanical properties are important.
Typical applications include:
- Low-alloy steel piping
- Pressure vessels
- Storage tanks
- Industrial equipment
- Structural low-alloy steel fabrication
- Low-temperature service equipment
- Heavy industrial equipment
- High-strength low-alloy steel applications
ER80S-D2 can be supplied for GMAW/MIG and GTAW/TIG applications according to product form and the qualified welding procedure
ER80S-D2 at a Glance
Item | Details |
|---|---|
AWS Classification | ER80S-D2 |
AWS Specification | AWS A5.28 / ASME SFA-5.28 |
Product Type | Solid Welding Wire / TIG Filler Rod |
Alloy System | Ni-Mo low-alloy steel |
Main Alloying Elements | Nickel + Molybdenum |
Strength Classification | ER80 |
Welding Processes | GMAW/MIG, GTAW/TIG |
Typical Applications | Piping, pressure vessels, low-alloy equipment |
Key Requirements | Strength, toughness, low-temperature performance |
Product Form | Spool / Rod |
Documentation | TDS / MTC / CoA according to requirements |
What Is ER80S-D2 Welding Wire?
ER80S-D2 is a nickel-molybdenum low-alloy solid welding wire classified under AWS A5.28.
The D2 classification is associated with a controlled Ni-Mo weld-metal chemistry.
This combination is useful for applications where the welding consumable must provide a balance of:
- Weld-metal strength
- Toughness
- Ductility
- Low-temperature performance
- Chemical compatibility with the base material
The correct consumable should always be selected according to the base material, service temperature, WPS/PQR and applicable code.
AWS A5.28 ER80S-D2 Chemical Composition
ER80S-D2 is characterized by controlled additions of nickel and molybdenum.
Typical classification chemistry includes:
Element | Typical / Classification Concept |
|---|---|
C | 0.07-0.12 |
Si | 0.50-0.80 |
Mn | 1.60-2.10 |
S | ≤0.025 |
P | ≤0.025 |
Ni | ≤0.15 |
Mo | 0.40-0.60 |
Cu | ≤0.50 |
| |
These are classification requirements, not guaranteed batch chemistry.
Actual chemical composition should be confirmed against the applicable GD WELD TDS and MTC/CoA for the supplied batch.
ER80S-D2 Mechanical Properties
ER80S-D2 belongs to the ER80 strength classification.
Typical minimum classification requirements include approximately:
Property | |
|---|---|
Tensile Strength | 550 - 740 MPa |
Yield Strength | ≥ 460 MPa |
Elongation | ≥ 17 % |
For applications involving reduced temperatures, Charpy impact toughness may also be an important purchasing requirement.
Actual weld-metal properties depend on:
- Welding process
- Shielding gas
- Heat input
- Welding parameters
- PWHT
- Test temperature
- Testing condition
For critical applications, use the actual MTC and qualified WPS/PQR for verification.
What Steel Is ER80S-D2 Used For?
ER80S-D2 is intended for compatible Ni-Mo low-alloy steel applications.
Potential application areas include:
- Low-alloy steel piping
- Pressure vessels
- Storage tanks
- Industrial machinery
- Structural low-alloy steel
- Heavy equipment
- Low-temperature service equipment
The exact base-material pairing should be confirmed against the applicable material specification and welding procedure.
Why Are Nickel and Molybdenum Used in ER80S-D2?
The combination of nickel and molybdenum is the defining feature of the D2 weld-metal system.
Nickel is particularly relevant to weld-metal toughness, while molybdenum contributes to the alloy system and strength characteristics.
Together, the controlled Ni-Mo chemistry can provide a suitable balance of:
- Strength
- Toughness
- Ductility
- Low-temperature performance
However, a higher alloy content does not automatically make a welding wire suitable for every application.
The selection should be based on:
Base Material + Service Temperature + Mechanical Requirements + AWS Classification + WPS/PQR
ER80S-D2 for Low-Temperature Applications
One of the useful search intents for ER80S-D2 is low-temperature welding wire.
For equipment operating at reduced temperatures, weld-metal impact toughness can become an important design consideration.
Potential applications include:
- Low-temperature piping
- Pressure vessels
- Storage equipment
- Industrial equipment
- Heavy machinery
- Outdoor equipment
- Low-temperature process systems
The required impact-test temperature and absorbed energy should be confirmed from the project specification.
ER80S-D2 and Impact Toughness
For low-temperature service, tensile strength alone is not sufficient for consumable selection.
Buyers may need to evaluate:
Impact Toughness + Test Temperature + Weld-Metal Chemistry + PWHT
Depending on the application, Charpy V-notch testing may be required.
Before ordering, confirm:
- Required impact-test temperature
- Minimum absorbed energy
- Test condition
- PWHT condition
- Applicable construction code
- Project specification
GD WELD can provide available impact-test documentation according to the actual product and project requirements.
ER80S-D2 Welding Processes
GMAW / MIG
ER80S-D2 can be supplied as solid wire for GMAW/MIG applications.
Important variables include:
- Wire diameter
- Shielding gas
- Current
- Voltage
- Wire-feed speed
- Travel speed
- Heat input
Actual welding parameters should follow the qualified WPS.
GTAW / TIG
ER80S-D2 can also be supplied as TIG filler rod where the product form and welding procedure require it.
GTAW may be selected for:
- Pipe root passes
- Critical joints
- Precision welding
- Controlled deposition
ER80S-D2 Welding Procedure
Depending on the base material and project requirements, welding procedure controls may include:
Preheat → Interpass Control → Heat Input → Controlled Cooling → PWHT
The actual requirements depend on:
- Base material
- Material thickness
- Joint design
- Welding process
- Service temperature
- Applicable code
- WPS/PQR
For low-temperature applications, the procedure should ensure that the required weld-metal toughness is maintained.
ER80S-D2 vs ER80S-Ni1
| ER80S-D2 | ER80S-Ni1 |
|---|---|---|
Classification | D2 | Ni1 |
Strength | ER80 | ER80 |
Alloy System | Ni-Mo | Ni-alloyed |
Typical Ni | ~1.5–2.0% | ~1% |
Mo | ~0.5% | Controlled |
Main Focus | Strength + toughness | Toughness / low-temperature service |
Typical Applications | Low-alloy / pressure equipment | Low-alloy / low-temperature |
D2 → Ni + Mo
Ni1 → primarily Ni-alloyed
ER80S-D2 vs ER80S-Ni2
| ER80S-D2 | ER80S-Ni2 |
|---|---|---|
Alloy System | Ni-Mo | Ni-alloyed |
Typical Ni | ~1.5–2.0% | ~2% |
Mo | ~0.5% | Controlled |
Strength | ER80 | ER80 |
Main Focus | Ni-Mo strength/toughness | Ni-alloyed toughness |
Typical Applications | Low-alloy / pressure equipment | Low-temperature / low-alloy |
ER80S-D2 vs ER80S-B2
| ER80S-D2 | ER80S-B2 |
|---|---|---|
Alloy System | Ni-Mo | Cr-Mo |
Main Alloying Elements | Nickel + Molybdenum | Chromium + Molybdenum |
Typical Material | Compatible low-alloy steels | P11 / T11 |
Main Focus | Strength / toughness | Elevated-temperature Cr-Mo service |
Typical Applications | Low-alloy / pressure equipment | Boiler / steam piping |
Ni-Mo requirement → D2
P11/T11 Cr-Mo requirement → B2
ER80S-D2 vs ER90S-B3
| ER80S-D2 | ER90S-B3 |
|---|---|---|
Alloy System | Ni-Mo | Cr-Mo |
Strength | ER80 | ER90 |
Typical Material | Compatible low-alloy steels | P22 / T22 |
Main Focus | Strength / toughness | Elevated-temperature service |
Typical Applications | Low-alloy / pressure equipment | Boiler / refinery / power |
ER80S-D2 vs ER80S-B8
| ER80S-D2 | ER80S-B8 |
|---|---|---|
Alloy System | Ni-Mo | 9Cr-1Mo |
Strength | ER80 | ER80 |
Typical Material | Compatible low-alloy steels | P9 / T9 |
Main Service | Low-alloy / toughness | High-temperature service |
Typical Applications | Pressure equipment | Refinery / high-temperature piping |
How to Select ER80S-D2 Welding Wire
Before ordering ER80S-D2, confirm:
1. Base Material
What low-alloy steel is being welded?
2. AWS Classification
Does the WPS specifically require ER80S-D2?
3. Service Temperature
What is the minimum design or operating temperature?
4. Impact Requirements
What Charpy impact temperature and minimum energy are required?
5. Welding Process
GMAW/MIG or GTAW/TIG?
6. Wire Diameter
What diameter does the qualified welding procedure require?
7. PWHT
Is post-weld heat treatment required?
8. Certification
Is MTC, CoA, impact testing or third-party inspection required?
9. Packaging
Spool, TIG rod, drum or customized packaging?
Diameter and Packaging
ER80S-D2 can be supplied in different diameters and packaging formats according to welding process and customer requirements.
Possible formats include:
- MIG/GMAW spools
- TIG/GTAW rods
- Different wire diameters
- Standard packaging
- Customized packaging
For quotation, please provide:
Diameter + Welding Process + Packaging + Quantity
Available sizes and packaging should be confirmed according to the actual product supply program.
Quality and Technical Documents
For ER80S-D2 projects, buyers may request:
- Technical Data Sheet (TDS)
- Mill Test Certificate (MTC)
- Certificate of Analysis (CoA)
- Chemical composition
- Mechanical properties
- Charpy impact test data
- Certificate of Conformity
- Packaging information
- Project-specific documentation
For low-temperature and pressure-equipment applications, impact-test and certification requirements should be confirmed before ordering.
Technical Documents
GD WELD can provide technical documentation according to product and project requirements:
TDS · MTC/CoA · Chemical Composition · Mechanical Properties · Charpy Impact Data · Certificates · Packaging Information
For project-specific documentation, confirm requirements before ordering.
Frequently Asked Questions
What is ER80S-D2 welding wire?
ER80S-D2 is an AWS A5.28 Ni-Mo alloyed low-alloy solid welding wire designed for compatible low-alloy steel applications.
What does D2 mean in ER80S-D2?
D2 identifies a specific low-alloy weld-metal classification based on a controlled nickel-molybdenum alloy system.
What is ER80S-D2 used for?
It is used for compatible low-alloy steels in applications such as piping, pressure vessels, industrial equipment and selected low-temperature service.
Is ER80S-D2 suitable for low-temperature service?
It can be selected for compatible applications requiring good weld-metal toughness at reduced temperatures, subject to the applicable specification and qualified WPS/PQR.
What is the difference between ER80S-D2 and ER80S-Ni2?
ER80S-D2 is a Ni-Mo alloyed consumable, while ER80S-Ni2 belongs to a different nickel-alloyed classification. They should not be considered interchangeable solely because their nickel levels may be similar.
What is the difference between ER80S-D2 and ER80S-Ni1?
D2 contains a Ni-Mo alloy system, while Ni1 is a different nickel-alloyed classification. The correct choice depends on the base material and WPS/PQR.
What is the difference between ER80S-D2 and ER80S-B2?
D2 is a Ni-Mo consumable, while B2 is a Cr-Mo consumable associated with P11/T11 applications.
Can ER80S-D2 replace ER80S-B2?
Do not assume substitution. The base material, AWS classification, service conditions and qualified welding procedure must be considered.
Can ER80S-D2 be used for P11?
Do not assume substitution. P11 applications require the consumable specified by the qualified welding procedure.
Does ER80S-D2 require PWHT?
PWHT requirements depend on the base material, thickness, welding procedure and applicable code. Follow the approved WPS/PQR.
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