24Jun, 2026
ASTM Standard Castings and Forgings for Industrial Applications
ASTM International sets globally recognized material specifications for industrial metal castings and forgings, standardizing chemical composition, mechanical performance, heat treatment and inspection rules for heavy-duty equipment components. All cross-border industrial projects, pressure vessels, turbine assemblies, pipeline fittings and mining wear parts widely adopt ASTM certified castings and forgings to guarantee interchangeability, operational safety and full material traceability.
ASTM standards split metal components into two core categories: ASTM standard steel & iron castings for complex housings, wear parts and pressure casings; and ASTM standard steel forgings for high-load shafts, flanges and cyclic fatigue critical parts. This article sorts the most widely applied ASTM specifications, grade features, service limits and matching industrial scenarios for global procurement reference.

Part 1: Core ASTM Standard Castings for General & Heavy Industry

ASTM casting specifications cover carbon steel, low-alloy heat-resistant steel, stainless steel, ductile iron and wear-resistant cast alloys, mainly manufactured via sand casting, investment casting and resin sand casting.

1.1 Carbon Steel Castings (High-temperature pressure service)

ASTM A216 / A216M

Grades: WCA, WCB, WCC
  • Feature: Weldable carbon steel castings for medium-high temperature pressure parts up to 425℃; WCB is the most universal industrial grade with balanced strength and ductility
  • Typical cast parts: Valve bodies, pump housings, pipeline elbows, boiler auxiliary castings
  • Main industries: Oil & gas, thermal power, chemical fluid equipment

ASTM A27 / A27M

General carbon steel castings without strict pressure limits, low cost for non-critical structural brackets, machinery frames and low-load housings

1.2 Low Alloy Heat-Resistant Steel Castings

ASTM A217 / A217M

Grades: WC6, WC9, C12, CA15
  • Feature: Cr-Mo alloy castings with excellent creep resistance for ultra-high temperature steam service
  • WC6 (1.25Cr-0.5Mo): Mid-temperature boiler valve castings
  • WC9 (2.25Cr-1Mo): Supercritical power plant high-pressure casings
  • CA15: Martensitic stainless casting for high-temperature corrosion-resistant valve trim
  • Applications: Steam turbine components, power boiler high-temperature fittings, petrochemical reactor castings

ASTM A356 / A356M

Heavy-wall carbon & alloy steel turbine castings, specially designed for steam turbine inner casings and nozzle box castings in power generation

1.3 Stainless & Duplex Steel Castings (Corrosion resistance)

ASTM A351 / A351M

Austenitic stainless steel castings for pressure equipment
  • CF8 (304 equivalent), CF8M (316L equivalent): Resist weak acid, seawater and oxidation
  • Main parts: Marine pump casings, chemical valve bodies, offshore fluid componentsASTM International

ASTM A995 / A995M

Duplex stainless steel castings (2205, 2507 equivalent), outstanding chloride and sour gas corrosion resistance for offshore and oilfield corrosive media

1.4 Ductile Iron & Wear-Resistant Cast Iron ASTM Standards

ASTM A536

Standard specification for nodular ductile iron castings (QT400 / QT500 / QT700 equivalent)
  • Balanced strength, impact toughness and castability
  • Applications: Construction machinery brackets, hydraulic housings, low-medium pressure pump casings

ASTM A439

Austenitic ductile iron castings for low-temperature and corrosion-resistant pump & valve parts

ASTM A128

High manganese Hadfield steel castings for impact-abrasion mining wear parts (jaw plates, mill liners, bucket teeth), unique work-hardening property under heavy ore impact

Part 2: Key ASTM Standard Forgings for Heavy Industrial Load-Bearing Parts

Forging ASTM standards focus on solid metal blanks formed by open die or closed die hot forging, delivering dense grain flow, high fatigue and impact resistance for critical dynamic components.

2.1 Carbon Steel Forgings (Normal & Medium Temperature)

ASTM A105 / A105M

The most widely used carbon steel forging standard for ambient to medium high-temperature service
  • Typical forgings: Pipeline flanges, pipe tees, small valve bodies, structural shaft blanks
  • Industries: Onshore oil & gas, general power piping, construction fluid systems

ASTM A350 / A350M

Low-temperature carbon & low-alloy forgings (LF2, LF3 grades)
  • Excellent low-temperature impact toughness for cold-region natural gas pipelines, polar marine equipment and cryogenic process fittings

ASTM A694

High-strength carbon steel forgings (F42, F60, F70) for heavy-duty oilfield wellhead, transmission and high-pressure pipeline connectors

2.2 Alloy & Heat-Resistant Steel Forgings for High Temperature

ASTM A182 / A182M

Alloy & stainless steel forgings for high-temperature pressure service, full series of F grades
  • F11 / F12 (1.25Cr-0.5Mo), F22 (2.25Cr-1Mo): Boiler header forgings, high-temperature flanges
  • F91 / F92 (9Cr-1Mo-V): Martensitic heat-resistant forgings for ultra-supercritical turbine rotors and main steam valve forgings
  • F304, F316, F51, F53: Stainless & duplex steel forgings for corrosive high-temperature environments

ASTM A723

High-strength alloy steel forgings for high-pressure vessel components and heavy hydraulic cylinder blanks

2.3 Special Industrial Forging Standards

ASTM A288

Carbon & alloy steel forgings for generator rotor retaining rings in power generation equipment

ASTM A1049

Duplex stainless steel forgings for offshore subsea pipeline flanges and marine high-pressure fittings

ASTM A837

Carburizing alloy steel forgings for heavy machinery gear blanks, transmission axles and connecting rods

Part 3: Quick Comparison – ASTM Casting vs ASTM Forging Industrial Application Logic

Standard Type Core ASTM Series Core Advantages Best Industrial Components
Carbon Steel Castings A216, A27 Complex inner cavity forming, low cost for large housings Valve bodies, pump casings, mill liners
Alloy Heat-Resist Castings A217, A356 Stable creep resistance above 500℃ Turbine casings, boiler high-temperature castings
Stainless Castings A351, A995 Anti-seawater & acid corrosion Chemical & offshore fluid cast parts
Ductile Iron Castings A536, A439 Toughness + vibration damping Construction machinery structural castings
High Mn Wear Castings A128 Impact abrasion resistance Mining crusher wear parts
Carbon Steel Forgings A105, A350 Dense grain, high fatigue resistance Standard flanges, low-temp pipeline fittings
High-Temp Alloy Forgings A182 F-series Long-term high-temperature load capacity Turbine shafts, rotor discs, supercritical pressure forgings
Duplex Forgings A1049 Corrosion + high strength dual performance Offshore & sour gas oilfield forgings
High-Strength Forgings A694, A723 Overload resistance for heavy equipment Mining truck axles, heavy connecting rods

Part 4: Industry-by-Industry ASTM Standard Matching Guide

1. Power Generation

  • Castings: A216 WCB boiler castings, A217 WC9 turbine housings, A356 heavy-wall turbine castings
  • Forgings: A182 F22 / F91 rotor shafts, A288 generator ring forgings, A105 high-pressure flanges

2. Oil & Gas Onshore / Offshore

  • Castings: A216 valve bodies, A351 CF8M marine pump housings, A995 duplex castings for sour gas
  • Forgings: A105 standard flanges, A350 LF2 low-temp pipeline forgings, A694 F70 wellhead forgings, A182 F53 duplex forgings

3. Mining & Quarry

  • Castings: A128 high manganese wear castings, A536 ductile iron support brackets
  • Forgings: A837 alloy gear blanks, A723 heavy hydraulic cylinder forgings

4. Construction Machinery

  • Castings: A536 ductile iron hydraulic housings, A27 general structural castings
  • Forgings: A182 F11 heavy axles, A837 forged connecting rods

5. Marine & Shipbuilding

  • Castings: A351 stainless pump casings, A352 low-temperature castings
  • Forgings: A350 LF2 propeller shaft blanks, A1049 duplex offshore flange forgings

6. Chemical & Petrochemical

  • Castings: A217 high-temperature alloy castings, A351 / A995 corrosion-resistant castings
  • Forgings: A182 stainless & alloy steel reactor flange forgings

Part 5: Critical Compliance & Inspection Requirements for ASTM Certified Parts

To meet full ASTM standard requirements, foundries and forging manufacturers must complete standardized testing and provide full MTC material test certificates for each batch:
  1. Chemical spectral analysis strictly matching ASTM grade composition limits
  2. Mechanical testing per ASTM A370: tensile strength, yield, elongation, hardness, impact toughness (low-temperature impact for A350/A352)
  3. Mandatory heat treatment as specified in each ASTM specification (normalizing, quenching & tempering, solution annealing)
  4. NDT non-destructive inspection: UT, MT, PT for thick-wall pressure-bearing castings and heavy forgings
  5. Full dimensional verification, traceable batch records from raw billet to finished delivery

Conclusion

ASTM standard castings and forgings form the universal material benchmark for global industrial equipment. When selecting components, match the ASTM specification to three core factors: operating temperature, corrosive or abrasive service environment, and part forming process (casting for complex housings, forging for high-load dynamic parts). Adopting ASTM certified metal components eliminates material mismatch risks, simplifies cross-border project acceptance, extends equipment service life and reduces long-term industrial maintenance costs.