Heat Resistant & Cr-Mo
ER80S-B2 P11 & T11
ER80S-B2 welding wire is an AWS A5.28 low-alloy Cr-Mo solid welding wire for P11, T11 and other compatible 1.25Cr-0.5Mo steels used in high-temperature and pressure applications. ER80S-B2 is a 1.25Cr-0.5Mo low-alloy welding wire designed for compatible P11 and T11 steels. It is commonly used for high-temperature piping, boiler components, pressure vessels, heat exchangers, refineries, petrochemical equipment and power-generation applications.
ER80S-B2 Welding Wire
ER80S-B2 is an AWS A5.28 low-alloy solid welding wire for compatible 1.25Cr-0.5Mo steels such as P11 and T11.
It is designed for applications where the weld metal requires controlled chromium-molybdenum chemistry, strength and high-temperature performance
Typical applications include：
- P11 and T11 pipe welding
- Steam piping
- Boiler components
- Pressure vessels
- Heat exchangers
- Refineries
- Petrochemical equipment
- Chemical processing equipment
- Power-generation equipment
ER80S-B2 can be supplied for GMAW/MIG and GTAW/TIG applications according to product form and the qualified welding procedure.
ER80S-B2 at a Glance
Item | Details |
|---|---|
AWS Classification | ER80S-B2 |
AWS Specification | AWS A5.28 / ASME SFA-5.28 |
Product Type | Solid Welding Wire / TIG Filler Rod |
Alloy System | 1.25Cr-0.5Mo |
Typical Materials | P11, T11 and compatible Cr-Mo steels |
Welding Processes | GMAW/MIG, GTAW/TIG |
Typical Applications | Boilers, steam piping, pressure vessels, heat exchangers, refinery and petrochemical equipment |
Service | High-temperature / pressure service |
Product Form | Spool / Rod |
Documentation | TDS / MTC / CoA according to requirements |
What Is ER80S-B2 Welding Wire?
ER80S-B2 is an AWS A5.28 low-alloy Cr-Mo welding wire belonging to the 1.25Cr-0.5Mo material system.
It is commonly associated with heat-resistant steels such as:
- P11
- T11
- F11
- WC6
- Other compatible 1.25Cr-0.5Mo steels
The controlled addition of chromium and molybdenum provides weld-metal chemistry suitable for elevated-temperature applications.
ER80S-B2 is therefore different from general-purpose carbon-steel welding wires such as ER70S-6.
For specialty Cr-Mo applications, the welding consumable should be selected according to the base material, service conditions and qualified WPS/PQR.
AWS A5.28 ER80S-B2 Chemical Composition
Typical AWS A5.28 classification limits include:
Element | AWS Classification Requirement, wt.% |
|---|---|
C | 0.07–0.12 |
Mn | 0.40–0.70 |
Si | 0.40–0.70 |
P | ≤0.020 |
S | ≤0.010 |
Ni | ≤0.20 |
Cr | 1.20–1.50 |
Mo | 0.40–0.65 |
Cu | ≤0.35 |
Actual chemistry may vary within the applicable specification limits. For a specific batch, please contact GD WELD.
ER80S-B2 Mechanical Properties
Typical AWS classification requirements include approximately:
Property | Minimum |
|---|---|
Tensile Strength | 550 MPa / 80 ksi |
Yield Strength | 470 MPa / 68 ksi |
Elongation | 19% |
Impact requirements and actual mechanical properties depend on the applicable classification, test condition and product documentation.
For critical applications, use the actual MTC, technical data sheet and qualified WPS/PQR rather than relying on typical values alone.
What Steel Is ER80S-B2 Used For?
ER80S-B2 is primarily associated with 1.25Cr-0.5Mo heat-resistant steels.
Typical compatible materials include:
- ASTM A335 P11
- ASTM A213 T11
- ASTM A387 Grade 11
- ASTM A182 F11
- ASTM A234 WP11
- Other compatible 1.25Cr-0.5Mo steels
These materials are used in high-temperature piping, boilers, pressure equipment, heat exchangers and process equipment.
ER80S-B2 for P11 Steel Welding
P11 welding wire is one of the most important application keywords for ER80S-B2.
P11 is a 1.25Cr-0.5Mo low-alloy steel used for elevated-temperature service.
Typical applications include:
- Steam piping
- Boiler components
- Headers
- Pressure vessels
- Heat exchangers
- High-temperature process piping
- Refinery equipment
ER80S-B2 is selected when the weld metal needs to provide suitable 1.25Cr-0.5Mo Cr-Mo chemistry for compatible P11 applications.
ER80S-B2 for T11 Steel Welding
ER80S-B2 is also commonly associated with T11 welding applications.
Typical applications include:
- Boiler tubes
- Superheater components
- Heat-transfer components
- High-temperature boiler systems
- Power-generation equipment
For T11 welding, the consumable and welding parameters should follow the qualified WPS/PQR.
Why Is ER80S-B2 Used for P11?
The main reason is compatibility with the 1.25Cr-0.5Mo material system.
Important characteristics include:
- Approximately 1.25% Cr
- Approximately 0.5% Mo
- Low-alloy Cr-Mo chemistry
- High-temperature service capability
- Good weld-metal compatibility
- P11/T11 applications
The goal is not simply to obtain a higher tensile strength.
Base-metal chemistry + weld-metal chemistry + welding procedure + PWHT must be considered together.
Where Is ER80S-B2 Used?
Power Generation
Typical applications include:
- Steam piping
- Boiler components
- Headers
- Heat exchangers
- High-temperature piping
Boiler Applications
ER80S-B2 may be used for compatible:
- Boiler tubes
- Superheater components
- Pressure parts
- High-temperature piping
Refinery and Petrochemical
Potential applications include:
- Process piping
- Pressure vessels
- Heat exchangers
- High-temperature refinery equipment
- Petrochemical equipment
Chemical Processing
Applications may include:
- Pressure equipment
- Process piping
- Heat exchangers
- High-temperature components
ER80S-B2 Welding Processes
GMAW / MIG
ER80S-B2 can be supplied as solid welding 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-B2 can also be supplied as TIG filler rod.
GTAW is commonly considered for:
- Pipe root passes
- Critical joints
- Precision welding
- Controlled deposition
The shielding gas, purge requirements and welding parameters should follow the qualified procedure.
P11 Welding: Preheat, Interpass and PWHT
Cr-Mo steels require controlled welding procedures.
Depending on:
- Base-metal grade
- Material thickness
- Joint design
- Welding process
- Applicable code
- WPS/PQR
the procedure may specify:
Preheat → Interpass Control → Heat Input → Controlled Cooling → PWHT
Exact temperatures and holding times should not be copied from a generic product page.
They must be established according to the applicable construction code and qualified welding procedure.
For critical P11/T11 applications, control of the complete thermal cycle is important for weld quality and service performance.
ER80S-B2 vs ER70S-6
| ER80S-B2 | ER70S-6 |
|---|---|---|
Material System | 1.25Cr-0.5Mo | Carbon steel |
Typical Material | P11 / T11 | Carbon steel / mild steel |
Strength Classification | ER80 | ER70 |
High-Temperature Service | Yes | Limited by base material/application |
Typical Applications | Boilers / piping / refinery | General fabrication / carbon steel |
Can ER70S-6 Replace ER80S-B2?
Not automatically.
If the base material is P11/T11, selecting a general-purpose carbon-steel wire simply because it is easier to source can create a weld-metal chemistry mismatch.
For critical Cr-Mo applications, consumable selection should follow the WPS/PQR and applicable code.
ER80S-B2 vs ER90S-B3
| ER80S-B2 | ER90S-B3 |
|---|---|---|
Alloy System | 1.25Cr-0.5Mo | 2.25Cr-1Mo |
Typical Material | P11 / T11 | P22 / T22 |
Strength Classification | ER80 | ER90 |
Chromium | ~1.25% | ~2.25% |
Molybdenum | ~0.5% | ~1.0% |
Typical Applications | Boiler / piping | Boiler / refinery / power |
P11/T11 → B2
P22/T22 → B3
ER80S-B2 vs ER80S-B6
| ER80S-B2 | ER80S-B6 |
|---|---|---|
Alloy System | 1.25Cr-0.5Mo | 5Cr-0.5Mo |
Typical Material | P11 / T11 | P5 / T5 |
Chromium | ~1.25% | ~5% |
Typical Service | High-temperature | Heat-resistant / high-temperature |
Typical Applications | Boiler / piping | Refinery / petrochemical |
P11/T11 ≠ P5/T5
ER80S-B2 vs ER80S-B8
| ER80S-B2 | ER80S-B8 |
|---|---|---|
Alloy System | 1.25Cr-0.5Mo | 9Cr-1Mo |
Typical Material | P11 / T11 | P9 / T9 |
Chromium | ~1.25% | ~9% |
Typical Service | High-temperature | High-temperature |
Typical Applications | Boilers / piping | 9Cr high-temperature applications |
P11/T11 → B2
P9/T9 → B8
ER80S-B2 vs ER90S-B91
| ER80S-B2 | ER90S-B91 |
|---|---|---|
Alloy System | 1.25Cr-0.5Mo | 9Cr-1Mo-V-Nb |
Typical Material | P11 / T11 | P91 / T91 |
Strength Classification | ER80 | ER90 |
Typical Service | High-temperature | High-temperature / creep |
Typical Applications | Boilers / piping | Grade 91 power-generation applications |
P11/T11 → B2
P91/T91 → B91
Diameter and Packaging
ER80S-B2 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-B2 projects, buyers may request:
- Technical Data Sheet (TDS)
- Mill Test Certificate (MTC)
- Certificate of Analysis (CoA)
- Chemical composition
- Mechanical properties
- Impact test data where required
- Certificate of Conformity
- Packaging information
- Project-specific documentation
For refinery, petrochemical, boiler and pressure-equipment projects, certification requirements should be confirmed before ordering.
How to Select ER80S-B2 Welding Wire
Before ordering ER80S-B2, confirm:
1. Base Material
Is the material P11, T11, F11 or another compatible 1.25Cr-0.5Mo steel?
2. AWS Classification
Does the WPS specify ER80S-B2?
3. Welding Process
GMAW/MIG or GTAW/TIG?
4. Wire Diameter
What diameter does the welding procedure require?
5. Service Conditions
What temperature, pressure and service environment apply?
6. PWHT
What post-weld heat-treatment requirements apply?
7. Mechanical Requirements
Are tensile, impact or hardness requirements specified?
8. Certification
Is MTC or additional inspection documentation required?
9. Packaging
Spool, TIG rod, drum or customized packaging?
Technical Documents
GD WELD can provide technical documentation according to product and project requirements:
TDS · MTC/CoA · Chemical Composition · Mechanical Properties · Impact Test Data · Certificates · Packaging Information
For project-specific documentation, confirm requirements before ordering.
Frequently Asked Questions
What is ER80S-B2 welding wire?
ER80S-B2 is an AWS A5.28 low-alloy Cr-Mo welding wire associated with the 1.25Cr-0.5Mo material system.
What is ER80S-B2 used for?
It is commonly used for P11/T11 welding in boilers, steam piping, pressure vessels, heat exchangers, refineries, petrochemical equipment and power-generation applications.
Is ER80S-B2 suitable for P11 steel?
Yes. ER80S-B2 is commonly associated with compatible P11 welding applications, subject to the qualified WPS/PQR and applicable code.
Is ER80S-B2 suitable for T11 steel?
Yes. It is commonly associated with compatible T11 applications, subject to the applicable welding procedure and project requirements.
What is the difference between ER80S-B2 and ER70S-6?
ER80S-B2 is a low-alloy 1.25Cr-0.5Mo welding wire for Cr-Mo steels, while ER70S-6 is a general-purpose carbon-steel welding wire.
What is the difference between ER80S-B2 and ER90S-B3?
B2 is associated with P11/T11 and the 1.25Cr-0.5Mo system, while B3 is associated with P22/T22 and the 2.25Cr-1Mo system.
What is the difference between ER80S-B2 and ER80S-B6?
B2 is associated with P11/T11, while B6 is associated with P5/T5 and the 5Cr-0.5Mo system.
What is the difference between ER80S-B2 and ER80S-B8?
B2 is associated with 1.25Cr-0.5Mo steels, while B8 is associated with 9Cr-1Mo steels such as P9/T9.
What is the difference between ER80S-B2 and ER90S-B91?
B2 is associated with P11/T11, while B91 is associated with P91/T91 and the modified 9Cr-1Mo-V-Nb system.
Can ER70S-6 be used for P11 steel?
Do not assume substitution. P11 welding should use a consumable qualified for the application and specified by the applicable WPS/PQR.
Does ER80S-B2 require PWHT?
PWHT requirements depend on the base material, thickness, welding procedure and applicable code. Follow the approved WPS/PQR.
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