Alloy Steel material center
ASTM A182 alloy steel components for high-temperature pressure systems.
Compare A182 F5, F9, F11, F22, and F91 as material routes for industrial flanges, forged fittings, and valve parts.
- ASTM / ASMESpecification-led supply
- 5 grade routesOne focused source
- Global projectsExport documentation
Product routes
Start with the component. Then lock the material.
These links use the existing catalog structure. No additional material-by-product taxonomy archives are created.
Flanges
Weld neck, blind, slip-on, threaded, lap joint, and socket weld flange routes.
Browse flanges 02Pipe fittings
Elbows, tees, reducers, and end caps for welded or specified piping systems.
Browse pipe fittings 03Valves
Ball, gate, globe, check, and butterfly valve routes for process service.
Browse valvesGrade selector
Alloy Steel grade routes.
Use the cards to build a shortlist. Final suitability remains an engineering and code decision.
A182 F5
5Cr–0.5Mo alloy steel family
A chromium-molybdenum forging grade evaluated for selected refinery and high-temperature pressure-system duties.
A182 F9
9Cr–1Mo alloy steel family
A 9Cr-1Mo forging grade used in selected high-temperature applications and legacy piping specifications.
A182 F11
1.25Cr–0.5Mo alloy steel family
An established chromium-molybdenum forging family for elevated-temperature pressure service.
A182 F22
2.25Cr–1Mo alloy steel family
A widely specified 2.25Cr-1Mo forging grade for elevated-temperature and pressure-system applications.
A182 F91
9Cr–1Mo–V–Nb creep-strength-enhanced steel
A creep-strength-enhanced ferritic forging grade for demanding high-temperature service, with properties highly dependent on controlled heat treatment.
F5 and F9 use higher chromium levels; F11 and F22 are established chromium-molybdenum grades; F91 is a creep-strength-enhanced 9Cr material requiring especially disciplined heat treatment and welding control. The piping class and design code must name the permitted grade.
Procurement comparison
Translate the material name into order data.
The same commercial alloy name can map to different forging, fitting, and casting designations. State the complete material and product-form specification.
| Grade | Selection cue | Typical project context | Procurement control |
|---|---|---|---|
| A182 F5 | Chromium alloy service | Refining, petrochemical equipment, and process piping where the project class permits F5. | Specify grade, class where applicable, heat treatment, hardness, dimensional standard, and welding controls. |
| A182 F9 | Higher-chromium service | Power, refining, and thermal-process systems where F9 is explicitly listed by the design basis. | Confirm code listing, allowable stress, heat treatment, hardness, and compatibility with adjoining pipe and weld metal. |
| A182 F11 | Established Cr-Mo route | Power generation, petrochemical, boiler, and high-temperature process piping. | State the required F11 class, heat treatment, impact or hardness requirements, and project welding specification. |
| A182 F22 | High-temperature pressure | Refinery units, hydrogen service reviews, power systems, and thermal-process equipment. | Define the F22 class, heat treatment, hardness limits, NDE, and any hydrogen-service project requirements. |
| A182 F91 | Creep-strength enhanced | Modern high-temperature power and process systems designed specifically around Grade 91 materials. | Require traceable heat treatment, hardness mapping as specified, qualified welding and PWHT procedures, and strict material control. |
Engineering note: This page supports early-stage procurement. The responsible engineer must verify corrosion, pressure, temperature, fabrication, compatibility, and code requirements.
RFQ readiness
Five controls for a comparable quotation.
A precise technical basis prevents substitutions and makes supplier offers easier to compare.
Send your requirement to SASA FLANGE- 01Component and quantity
Product type, size range, quantity, facing or end connection, and dimensional standard.
- 02Exact material route
ASTM specification, grade, UNS number where applicable, product form, and heat-treatment condition.
- 03Design conditions
Fluid, concentration, contaminants, design pressure and temperature, minimum metal temperature, and operating cycle.
- 04Fabrication controls
Welding, post-weld heat treatment, hardness, cleanliness, pickling or passivation, and repair restrictions.
- 05Inspection and records
Material certificates, PMI, NDE, pressure testing, corrosion tests, traceability, marking, and third-party inspection.
Standards map
Start with the governing product standard.
Official standards define scope and requirements. The purchase order should name the applicable edition required by the project.
Technical FAQ
Direct answers for early material screening.
Structured for buyers, engineers, search engines, and future answer-engine retrieval.
What is Alloy Steel?
ASTM A182 alloy-steel grades use different chromium-molybdenum systems to support high-temperature pressure service. Their suitability depends on allowable stress, oxidation and corrosion conditions, welding procedure, heat treatment, wall thickness, and long-term operating regime.
How do I choose between the listed Alloy Steel grades?
F5 and F9 use higher chromium levels; F11 and F22 are established chromium-molybdenum grades; F91 is a creep-strength-enhanced 9Cr material requiring especially disciplined heat treatment and welding control. The piping class and design code must name the permitted grade.
Can the same alloy designation be used for flanges, fittings, and valves?
The same alloy family can be used across a pressure system, but the ASTM grade designation can change with product form and manufacturing route. Confirm the forging, wrought-fitting, or casting specification together with the dimensional standard and pressure rating.
What should a Alloy Steel RFQ include?
Include component type, exact grade and UNS where applicable, ASTM product specification, size, schedule or bore, pressure class, facing or end connection, quantity, service conditions, heat treatment, testing, certification, marking, and inspection requirements.
Does the material standard also define flange, fitting, or valve dimensions?
Usually not. The purchase specification normally combines a material standard with a dimensional or pressure-rating standard such as ASME B16.5, B16.9, B16.11, B16.34, an EN or DIN standard, or a project-specific specification.
Procurement support
Turn the material shortlist into a controlled RFQ.
Send your component list, service conditions, project standards, and inspection requirements for a specification-led quotation.