ASTM A182-F92 Forging Parts | China F92 Forged Steel Manufacturer for Europe

ASTM A182-F92 Forging Steel — Product Overview

As a leading ASTM A182-F92 forging manufacturer in China with over 25 years of experience, Jiangsu Liangyi produces a full range of F92 forged steel products based on ASTM, ASME, DIN and EN standards. Our F92 forgings are recognised for exceptional high-temperature strength, superior creep resistance and excellent corrosion resistance — the ideal choice for ultra-supercritical power generation across Europe.

We manufacture ASTM A182-F92, ASME SA182 F92, ASME SA336 F92, ASME SA336 P92 and A335 Grade P92 open-die forgings and seamless rolled rings. Products include sleeves, forged pipes, tubes and critical valve parts such as valve bodies, closures, stems, bonnets and seat rings. All supplied with EN 10204 Type 3.1 Mill Test Reports as standard. Type 3.2 (independent third-party witnessed inspection) is available on request when specified at order stage.

Available F92 Forged Steel Shapes & Dimensions

• Forged Bars: Round bars Ø50–2000 mm, square, flat and rectangular; single-piece weight up to 30 tons
• Seamless Rolled Rings: OD up to 6 m in diameter, weight up to 30 tons — rolled with controlled grain flow for maximum fatigue resistance
• Hollow Components: Hubs, housings, shells, sleeves, bushes and hollow bars up to OD 3000 mm
• Disc / Block Forgings: Discs, blocks and plates up to Ø3 m — trepanned and machined to near-net shape on request
• Pipe & Tube Forgings: Forged pipes, barrels, casings and pressure vessel shells with custom wall thickness

Explore our full forged product catalogue and material range covering carbon steel, alloy steel, stainless steel and nickel alloys.

ASTM A182-F92 — Complete Material Properties & Engineering Data

A182-F92 belongs to the 9–12% chromium tempered-martensitic steel family. Its development in the late 1980s was driven by the need to push steam turbine inlet temperatures beyond 593 °C — the practical ceiling for its predecessor F91. The engineering breakthrough was replacing roughly half the molybdenum with tungsten: tungsten atoms are heavier and diffuse more slowly in the iron matrix, which means the precipitate-hardening phases responsible for creep strength remain stable for much longer at elevated temperature.

The result is a steel that bridges the gap between conventional Cr-Mo alloys and expensive nickel superalloys — delivering USC-capable creep strength at a fraction of the cost of austenitic stainless steels or nickel alloys, while retaining the weldability and thermal expansion compatibility of ferritic steels.

F92 vs F91 Steel — Property Comparison

Material Selection Guide: The High-Temperature Steel Ladder

Choosing the right forging steel is a trade-off between service temperature, design pressure, weldability, thermal expansion compatibility and total cost of ownership. The following framework — developed from Jiangsu Liangyi’s experience supplying over 50 countries — helps engineers identify the optimal grade.

ASTM A182-F92 — European & International Equivalent Standards

European procurement engineers typically specify forgings using EN grades rather than ASTM designations. The table below provides a complete cross-reference so that procurement, quality and engineering teams can align without ambiguity.

Common F92 Steel Grade Designations — Full List

• A336 Grade F92 / SA336 Grade F92
• A336 Grade F921 / SA336 Grade F921
• A336 Grade FP92 / A387 Grade 92 / SA387 Grade 92
• A182 F92 / A182 F921 / SA182 F921
• A200 T92 / SA335 Grade P921
• A335 Grade P92 / A692 Grade 92 / SA335 Grade P92

Chemical Composition — ASME SA182 F92 / EN X10CrWMoVNb9-2

Mechanical Properties at Room Temperature — ASME SA182 F92

High-Temperature Mechanical Properties — ASTM A182-F92

Room-temperature properties confirm material identity, but elevated-temperature properties govern part sizing in USC power plant design. The data below is consistent with ASME Section II Part D allowable stresses and published European creep data compilations, and is essential for valve body wall thickness calculations, ring section sizing and nozzle design.

Physical & Thermal Properties of ASTM A182-F92 Steel

Physical properties are critical for thermal stress calculations, FEA of valve bodies during transients, and assessment of dissimilar-metal weld compatibility. One of F92’s practical advantages over austenitic alternatives is its coefficient of thermal expansion (CTE), which closely matches F91 and conventional Cr-Mo steels — making F92 components directly interchangeable in ferritic piping systems without introducing thermal fatigue at transition joints.

Heat Treatment Process for F92 Forgings

• Solution Annealing (Normalising): 1040–1080 °C — minimum 1 hour per 25 mm of maximum section thickness; ensures complete dissolution of carbides and full austenitisation
• Cooling Medium: Air cool to room temperature — cooling rate must be fast enough to avoid ferrite or bainite formation but slow enough to limit thermal gradients in large sections
• Tempering: 730–800 °C — the most sensitive parameter; temperatures below 730 °C produce insufficient softening; above 800 °C the Ac₁ intercritical zone begins, creating fresh untempered martensite on cooling
• Tempering Hold Time: Minimum 2 hours; for sections over 100 mm, add 1 additional hour per 25 mm above 100 mm
• Final Cooling: Air cool from tempering — no quench required or desirable

All heat treatment cycles at Jiangsu Liangyi are performed in calibrated furnaces with data-logged temperature traces, supplied to the customer as part of the documentation package.

Welding Guidelines for ASTM A182-F92 Forged Components

F92’s weldability is one of its key advantages over alternative high-temperature materials. However, because it is a martensitic steel, the welding procedure demands discipline — particularly regarding preheat, interpass temperature and post-weld heat treatment. Based on 25+ years of supplying F92 forgings to European and Asian power plant fabricators, we have compiled the following practical guidance.

Dissimilar Metal Welds: F92 to F91

Connecting F92 forged valve bodies to F91 piping is extremely common in USC power plants. The chemistries are close enough to use F92 filler metal for this joint, and the CTE mismatch is minimal. PWHT at 730–780 °C satisfies both grades. Avoid using F91 filler metal in F92 parent metal, as the slightly lower creep strength of F91 filler creates a soft zone at the weld cap in long-term service.

F92 Steel Long-Term Degradation — Damage Mechanisms & Mitigation

Ultra-supercritical power plant parts are designed for a service life of 200,000 hours (approximately 25 years), yet the steels within them are not static materials. At 600–620 °C, microstructural changes accumulate slowly but irreversibly. Understanding these degradation pathways is essential for plant engineers responsible for inspection planning, remaining life assessment and extension decisions. The four principal damage mechanisms in service-exposed F92 forgings are described below, along with the specific mitigation strategies that separate well-designed USC plants from those that suffer premature failures.

1. Type IV Creep Cracking in the Heat-Affected Zone

Type IV cracking occurs in the inter-critical heat-affected zone (IC-HAZ) — the narrow band of parent metal that was only partially austenitised during welding and therefore escaped the full normalising and tempering cycle applied to the base metal. This zone has a finer grain size but also fewer stable precipitates, making it the weakest cross-section in a welded part under sustained creep loading.

2. Laves Phase Formation and Embrittlement

At service temperatures above 550 °C, the tungsten and molybdenum additions that give F92 its creep strength begin to migrate out of solid solution and precipitate as Laves phase — an intermetallic compound with the approximate formula Fe₂(W,Mo). In the first 10,000–30,000 hours of service this precipitation is beneficial: fine Laves particles contribute to precipitation hardening. Beyond approximately 30,000 hours at 600 °C, however, the particles coarsen by Ostwald ripening, and the larger particles no longer impede dislocation motion effectively. The net result is a gradual reduction in creep strength and a measurable increase in room-temperature impact transition temperature (embrittlement).

This is why conservative engineering practice specifies that part wall thickness calculations use long-term creep rupture data (100,000-hour or extrapolated 200,000-hour), not the short-term elevated-temperature tensile values. The ASME allowable stress values in Table 5 already incorporate Laves phase effects through empirical long-term testing programmes. For applications at 620 °C, we recommend requesting the latest ECCC (European Creep Collaborative Committee) dataset for F92 / 1.4901 when sizing critical pressure-retaining components.

3. Steam Oxidation and Inner Oxide Scale Spallation

In steam-side service, the inner bore of F92 headers, pipes and valve flow passages develops an oxide scale consisting of an outer Fe₃O₄ layer and an inner Cr-rich spinel layer. Below approximately 580 °C, this scale is thin, adherent and protective. Above 580–590 °C, the growth rate accelerates non-linearly, and — critically — the differential thermal expansion between the steel and the oxide during load cycling causes periodic spallation of oxide flakes. These flakes travel downstream and cause erosion damage to turbine blades, solid-particle erosion of control valve seats, and deposition in steam pipework bends.

4. Delta-Ferrite and Its Consequences in Welds

If the F92 composition drifts outside its specified limits — in particular if nickel falls below ~0.05% or chromium approaches the upper limit of 9.50% — small islands of delta-ferrite can form during cooling from the forging or welding heat. Delta-ferrite is a different crystal structure from the tempered martensite matrix and has substantially lower creep ductility. More importantly, delta-ferrite provides a fast diffusion path for boron segregation and can nucleate Type I creep voids at much shorter times than the Type IV mechanism.

Jiangsu Liangyi’s process control specifies a target nickel content of 0.15–0.35% and a target chromium of 8.70–9.20% — well within ASTM limits but positioned to guarantee a fully martensitic microstructure after normalising. All heats are verified by metallographic examination of a heat treatment coupon, and the microstructure report is included in the documentation package.

ASTM A182-F92 vs E911 (X11CrMoWVNb9-1-1 / 1.4905) — Why They Are Not the Same

The most common misidentification in European USC procurement is treating E911 (VdTÜV WB 499, Mat. No. 1.4905) as interchangeable with F92 / X10CrWMoVNb9-2 (1.4901). They are not. Both are 9Cr-Mo-W-V-Nb steels developed in the 1990s for advanced USC service, but they have meaningfully different compositions, different approved product forms in EN standards, and different high-temperature performance characteristics. Specifying the wrong grade is not a technical formality issue — it can result in under-strength components at the highest service temperatures.

ASTM A182-F92 — ASME & EN Code Compliance Reference for Engineers

F92 forgings are used in pressure-retaining applications governed by multiple codes and directives simultaneously. The following reference table consolidates the main code authorities, applicable code sections, and specific approval references that govern the design, manufacture and documentation of F92 forged components in European and international power plant projects.

F92 Forgings in Flexible & Load-Following USC Power Plants

The European electricity grid is undergoing a structural transformation. With wind and solar penetration exceeding 40% in Germany, Denmark and the Netherlands, thermal power plants — including the newest USC units — are increasingly required to operate as balancing assets: starting cold two or three times per week, ramping output at ≥3% MW/min, and cycling between full load and minimum stable generation daily. This operating profile creates a fatigue loading environment that was not anticipated in the original 1990s design codes for F92 parts.

Understanding how F92 behaves under cyclic thermal loading is therefore not an academic exercise — it directly affects inspection intervals, remaining life management decisions and the economic viability of extending plant licences beyond the original 200,000-hour design life.

Thermal Fatigue Behaviour of F92 Forged Components

Every cold start imposes a thermal gradient across the wall of a thick-section valve body or header. The inner bore heats faster than the outer wall, generating compressive thermal stresses at the bore and tensile stresses at the outer diameter. This stress reversal accumulates low-cycle fatigue (LCF) damage. The total LCF life of a USC part is typically expressed as a number of allowable full start-stop cycles, calculated per ASME Section VIII Division 2 or EN 13445-3 Annex B.

Minimum Start-Up Temperature and Hold Requirements

Power plant operators subject to grid flexibility obligations often face pressure to reduce start-up time. For F92 components, the following minimum hold conditions apply and must not be bypassed even under grid emergency directives:

ASTM A182-F92 Applications & European Project Cases

ASTM A182-F92 is the material of choice for parts in ultra-supercritical (USC) and advanced USC power plants, combined-cycle stations and high-temperature chemical process equipment. Our F92 forged components have been deployed in over 50 countries, with a strong focus on the European power generation market.

Manufacturing Capability & Quality Control

Every ASTM A182-F92 forging at Jiangsu Liangyi passes through an integrated production chain controlled entirely in-house. No critical operations are sub-contracted. This provides full traceability from ingot chemistry to final dimensional report, and is a core reason why European EPCs and OEMs return to us order after order.

Melting & Refining

• Primary melting: EAF (electric arc furnace) or BOF processes
• Secondary refining: LF (ladle furnace) + VOD (vacuum oxygen decarburisation) — mandatory for F92 to achieve S ≤ 0.010% and precise boron control
• Premium melting: ESR (electroslag remelting) or VAR (vacuum arc remelting) for rotating components requiring the highest internal cleanliness and UT Class 3 acceptance

Forging & Ring Rolling

• 2000 / 4000 / 6300 ton hydraulic forging presses — covers all F92 forging sizes from small flanges to large valve bodies
• Manipulators with lifting capacity up to 60 tons for large open-die forgings
• Heating furnaces to 150-ton capacity with ±5 °C uniformity
• 1 m and 5 m radial-axial ring rolling mills — seamless rings up to OD 6 m
• CNC lathes, boring machines and milling machines — rough and finish machining to customer drawing

Non-Destructive Examination

• 100% immersion ultrasonic testing (UT) per ASTM A388 and EN 10228-3 — standard for all F92 forgings
• Magnetic particle testing (MT) per ASTM E709 / EN ISO 9934-1
• Liquid penetrant testing (PT) per ASTM E165 / EN ISO 3452-1
• Hardness mapping — HBW measurement at multiple locations per ASTM A370
• Dimensional inspection with calibrated CMM and laser measurement systems

EN 10204 Type 3.1 inspection documents are issued as standard with all F92 deliveries. EN 10204 Type 3.2 inspection (witnessed by an independent third party) is available on request — the customer nominates their preferred inspection body, such as DNV-GL, Bureau Veritas, Lloyd’s Register, TÜV or RINA, and arranges the scope directly with that body. Witness inspection visits to our Jiangyin facility are welcomed; we maintain an open-factory policy for pre-shipment inspection.

NDE Acceptance Criteria — Standard F92 Forging Specification

The table below summarises the default NDE specification applied to all standard F92 forgings. Customer-specific or project-specific NDE plans supersede these defaults and must be stated at inquiry stage.

Standard Quality Documentation Package — Delivered with Every F92 Order

Jiangsu Liangyi’s documentation package is designed to satisfy European EPC contractor quality plans, pressure equipment conformity assessment files and end-user maintenance records without additional requests. The following documents are issued as standard for every F92 forging delivery:

How to Order F92 Forgings — Get an Accurate Quote in 24 Hours

One of the most common reasons for quoting delays is incomplete inquiry information. Our sales and engineering teams have compiled this checklist — the eight pieces of information that allow us to issue a precise, binding quotation within 24 hours.

Related Forging Materials — Jiangsu Liangyi’s Alloy Steel Range

Jiangsu Liangyi manufactures the full spectrum of high-temperature alloy steel forgings for power generation, oil & gas and petrochemical applications. If F92 is not the right grade for your temperature and pressure conditions, our team can recommend and supply the appropriate alternative:

Frequently Asked Questions — ASTM A182-F92 Forgings for Europe