Heat Resistant & Cr-Mo
ER90S-B92 for P92 & T92
ER90S-B92 welding wire is an AWS A5.28 low-alloy Cr-Mo-W-V-Nb solid welding wire designed for P92, T92 and other compatible Grade 92 steels used in high-temperature and creep-resistant applications. ER90S-B92 is a modified 9Cr welding wire designed for P92, T92 and other compatible Grade 92 steels. With a controlled Cr-Mo-W-V-Nb alloy system, it is used for high-temperature piping, boilers, power-generation equipment and other applications requiring long-term creep resistance.
ER90S-B92 Welding Wire
ER90S-B92 is an AWS A5.28 low-alloy solid welding wire designed for compatible Grade 92 steels, including P92 and T92, for demanding elevated-temperature applications.
As part of the modified 9Cr-W-V-Nb welding consumable system, ER90S-B92 is used where weld-metal chemistry, high-temperature performance and compatibility with Grade 92 steels are important.
Typical applications include:
- P92 and T92 pipe welding
- Main steam and hot reheat piping
- Boiler headers and pressure components
- Superheater and reheater systems
- High-temperature power-generation equipment
- Other compatible Grade 92 components
ER90S-B92 is available for GMAW/MIG and GTAW/TIG applications, subject to product form and the qualified welding procedure.
ER90S-B92 at a Glance
Item | Details |
|---|---|
AWS Classification | ER90S-B92 |
Specification | AWS A5.28 / ASME SFA-5.28 |
Product Type | Solid welding wire / TIG filler rod |
Alloy System | Modified 9Cr-W-V-Nb |
Typical Base Materials | P92, T92 and compatible Grade 92 steels |
Strength Class | ER90 |
Welding Processes | GMAW/MIG, GTAW/TIG |
Main Service | Elevated-temperature / creep-resistant applications |
Typical Industries | Power generation, boiler and high-temperature piping |
Product Form | Spool / TIG rod |
Documentation | TDS, MTC/CoA and project documentation as required |
Why ER90S-B92 Is Used for Grade 92 Steel
Grade 92 steels are modified 9Cr steels developed for high-temperature service.
Unlike conventional 9Cr-1Mo consumables, the Grade 92 alloy system uses controlled additions of tungsten, vanadium, niobium and nitrogen, together with chromium and molybdenum. These alloying elements form part of the consumable system used for Grade 92 welding applications.
For buyers, the key point is simple:
P92/T92 welding requires a consumable system compatible with the Grade 92 base metal and the qualified welding procedure.
Selecting a wire only by tensile strength or chromium content is not sufficient for critical P92 applications.
ER90S-B92 Chemical Composition
ER90S-B92 belongs to the modified 9Cr-W-V-Nb alloy family.
A current commercial ER90S-B92 product example lists typical chemistry around:
Element | Typical Value / Function |
|---|---|
C | 0.11% |
Mn | 0.50% |
Si | 0.40% |
Cr | 9.2% |
Ni | 0.35% |
Mo | 0.45% |
W | 1.7% |
Nb | 0.05% |
V | 0.20% |
N | 0.05% |
B | 0.0035% |
The exact chemistry depends on the manufacturer and production batch. Always verify the actual MTC/CoA against the applicable AWS/ASME requirements before use.
ER90S-B92 Mechanical Properties
ER90S-B92 is an ER90-class welding consumable.
Under the applicable AWS A5.28 requirements, the minimum mechanical requirements include:
Property | Minimum |
|---|---|
Yield Strength | 540 MPa / 78 ksi |
Tensile Strength | 620 MPa / 90 ksi |
Elongation | 16% |
Actual weld-metal properties can vary with:
- Welding process
- Shielding gas
- Heat input
- Welding parameters
- Base-metal chemistry
- PWHT
- Testing condition
For P92/T92 projects, the actual product certificate and qualified WPS/PQR should take priority over generic product-page values.
P92 and T92 Welding Applications
The primary search and application focus for ER90S-B92 is P92/T92 welding.
P92 Steel
Typical P92 applications include:
- Main steam piping
- Hot reheat piping
- Boiler headers
- Superheater systems
- Reheater systems
- High-temperature pressure components
- Power-generation equipment
T92 Steel
T92 is commonly associated with high-temperature boiler and heat-transfer components, including:
- Boiler tubes
- Superheater tubes
- Reheater tubes
- High-temperature pressure parts
- Power-generation equipment
For either material, consumable selection should be confirmed against the applicable material specification, welding code and qualified WPS/PQR.
ER90S-B92 for High-Temperature Service
ER90S-B92 is intended for applications where the welding consumable must be compatible with a modified Grade 92 steel system.
Its alloy design includes:
Cr + Mo + W + V + Nb + N + controlled B
This makes the consumable particularly relevant to high-temperature components where long-term weld-metal performance and creep resistance are important considerations.
Typical industries include:
- Thermal power generation
- Boiler fabrication
- High-temperature piping
- Power-plant maintenance and repair
- Selected high-temperature process equipment
Application suitability should always be confirmed against the complete welding procedure and service requirements.
Welding Processes
GMAW / MIG
ER90S-B92 can be supplied as solid wire for GMAW/MIG welding.
Key variables include:
- Wire diameter
- Shielding gas
- Current
- Voltage
- Wire-feed speed
- Travel speed
- Heat input
The actual parameters should follow the qualified WPS.
GTAW / TIG
ER90S-B92 is also available as TIG filler rod for applications requiring controlled deposition.
GTAW may be used for:
- Pipe root passes
- Precision welding
- Critical joints
- Controlled repair work
Shielding gas, purge requirements and welding parameters must follow the qualified procedure.
P92 Welding Procedure: Preheat, Interpass and PWHT
P92 welding requires careful control of the complete welding cycle.
Important variables include:
Preheat → Interpass Temperature → Heat Input → Cooling → PWHT
For Grade 92 applications, PWHT is a critical procedure variable. The correct temperature, holding time and cooling requirements depend on the applicable code, base-metal thickness, joint design, welding procedure and project requirements.
Do not use generic temperatures from a product webpage as a replacement for an approved WPS/PQR.
For critical P92/T92 projects, the welding procedure should be qualified before production welding.
ER90S-B92 vs ER90S-B91
| ER90S-B92 | ER90S-B91 |
|---|---|---|
Typical Material | P92 / T92 | P91 / T91 |
Alloy System | Modified 9Cr-W-V-Nb | Modified 9Cr-1Mo-V-Nb |
Strength Class | ER90 | ER90 |
Key Alloy Feature | Tungsten-containing Grade 92 system | Grade 91 alloy system |
Typical Service | High-temperature / creep-resistant | High-temperature / creep-resistant |
Typical Industry | Advanced power generation | Power generation |
P91/T91 → B91
P92/T92 → B92
ER90S-B92 vs ER90S-B9
ER90S-B9 is a legacy classification associated with Grade 91/P91/T91 welding. AWS A5.28:2020 introduced ER90S-B91, replacing ER90S-B9.
| ER90S-B92 | ER90S-B9 / B91 |
|---|---|---|
Typical Material | P92 / T92 | P91 / T91 |
Alloy System | Modified 9Cr-W-V-Nb | Grade 91 modified 9Cr system |
Current Classification | B92 | B91 |
Service | High-temperature / creep-resistant | High-temperature / creep-resistant |
For new projects, always check the classification specified by the current applicable standard and project documentation.
ER90S-B92 vs ER90S-B3
| ER90S-B92 | ER90S-B3 |
|---|---|---|
Typical Material | P92 / T92 | P22 / T22 |
Alloy System | Modified 9Cr-W-V-Nb | 2.25Cr-1Mo |
Strength Class | ER90 | ER90 |
Typical Service | High-temperature / creep-resistant | Elevated-temperature service |
Typical Applications | Advanced power generation | Boiler, piping and pressure equipment |
P22/T22 → B3
P92/T92 → B92
ER90S-B92 vs ER80S-B8
| ER90S-B92 | ER80S-B8 |
|---|---|---|
Typical Material | P92 / T92 | P9 / T9 |
Alloy System | Modified 9Cr-W-V-Nb | 9Cr-1Mo |
Strength Class | ER90 | ER80 |
Typical Service | High-temperature / creep-resistant | High-temperature service |
Main Difference | Grade 92 consumable system | Conventional 9Cr-1Mo system |
The two wires should not be treated as interchangeable simply because both are associated with approximately 9% Cr steels.
How to Select ER90S-B92 Welding Wire
Before ordering ER90S-B92, confirm these points:
1. Base Material
Is the material P92, T92 or another compatible Grade 92 steel?
2. Required Classification
Does the WPS specify ER90S-B92?
3. Welding Process
GMAW/MIG or GTAW/TIG?
4. Wire Diameter
What diameter is required by the qualified welding procedure?
5. Service Conditions
What temperature, pressure and operating environment will the welded component experience?
6. PWHT Requirements
What PWHT procedure is specified by the applicable code and WPS?
7. Mechanical Requirements
Are tensile, impact, hardness or other weld-metal requirements specified?
8. Certification
Is MTC, CoA, third-party inspection or project-specific documentation required?
9. Packaging
Do you require spool, TIG rod or another packaging format?
Diameter and Packaging
ER90S-B92 can be supplied in different diameters and packaging formats depending on welding process and customer requirements.
Possible options include:
- GMAW/MIG spools
- GTAW/TIG rods
- Different wire diameters
- Standard industrial packaging
- Customized packaging where available
For quotation, provide:
AWS Classification + Base Material + Diameter + Welding Process + Quantity + Packaging
Quality and Technical Documentation
For P92/T92 and other critical applications, buyers may request:
- Technical Data Sheet (TDS)
- Mill Test Certificate (MTC)
- Certificate of Analysis (CoA)
- Chemical composition
- Mechanical properties
- Impact test data where applicable
- Certificate of Conformity
- Packaging and traceability information
- Project-specific documentation
For critical power-generation projects, confirm certification and traceability requirements before ordering.
Frequently Asked Questions
What is ER90S-B92 welding wire?
ER90S-B92 is an AWS A5.28 low-alloy solid welding wire associated with the modified Grade 92 9Cr-W-V-Nb material system.
What is ER90S-B92 used for?
It is primarily used for compatible P92 and T92 welding applications, particularly high-temperature piping, boiler components and power-generation equipment.
Is ER90S-B92 suitable for P92 steel?
ER90S-B92 is designed for compatible Grade 92 applications, including P92. Final suitability depends on the applicable code, material specification and qualified WPS/PQR.
Is ER90S-B92 suitable for T92 steel?
Yes, ER90S-B92 is associated with compatible T92 welding applications. The actual welding procedure must be qualified for the project.
What is the difference between ER90S-B92 and ER90S-B91?
B92 is associated with P92/T92, while B91 is associated with P91/T91. Their alloy systems are different.
What is the difference between ER90S-B92 and ER90S-B9?
B9 is the older classification associated with Grade 91 steels. AWS A5.28:2020 introduced ER90S-B91 as its replacement.
What is the difference between ER90S-B92 and ER90S-B3?
B92 is associated with modified Grade 92 steels such as P92/T92, while B3 is associated with 2.25Cr-1Mo steels such as P22/T22.
What is the difference between ER90S-B92 and ER80S-B8?
B92 is a Grade 92 consumable system, while B8 is associated with 9Cr-1Mo P9/T9 steels. Their alloy systems and intended base materials are different.
Can ER90S-B92 replace ER90S-B91?
Do not assume interchangeability. The consumable should match the base material, applicable classification and qualified welding procedure.
Can ER90S-B92 be used for P91?
Do not assume substitution. P91 applications require the appropriate Grade 91 consumable system and qualified welding procedure.
Does ER90S-B92 require PWHT?
PWHT requirements depend on the base material, thickness, welding procedure, applicable code and project requirements. For Grade 92 applications, follow the approved WPS/PQR.
ER90S-B92 Welding Wire for P92 and T92 Applications
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