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Solution heat treating at Ironbound Castings
HomeHeat TreatingSolution Heat Treating
Aluminum & Nickel

Solution Heat Treating

A356-T6 solution treat and age, C95500 annealing per MIL-B-21230 — in-house furnace and quench tank, fully documented.

A356 & C95500

Key Alloys

On-Site Tank

Quench

MIL-SPEC

Documentation

Our Process

Maximum Properties Through Controlled Thermal Processing

Solution heat treatment heats a casting to a high temperature to dissolve alloying elements into a uniform solid solution, then rapidly quenches the casting to lock in that microstructure. For aluminum alloys, the casting is then artificially aged — the T6 temper — to precipitate fine strengthening particles and achieve peak hardness and tensile strength.

For C95500 nickel aluminum bronze, solution annealing per MIL-B-21230 is a Navy-mandated treatment that dissolves harmful beta-phase microstructures and ensures uniform corrosion resistance across the casting cross-section — critical for propellers and seawater-exposed fittings.

Solution heat treating furnace at Ironbound Castings

In-House Capability

Furnace and water quench tank on-site — no outside vendor, no schedule risk between casting and heat treatment

Key Capabilities

Solution Treating Advantages

A356-T6 Aluminum

Full solution treat and artificial age cycle for A356 aluminum castings — dissolves alloying elements, quenches to supersaturated solid solution, then ages to peak hardness and strength per T6 designation.

C95500 NAB Annealing

Solution annealing of nickel aluminum bronze (C95500) per MIL-B-21230 — required by the Navy to ensure uniform microstructure, corrosion resistance, and mechanical properties in propellers and critical fittings.

On-Site Quench Tank

Water quench tank at our Newark foundry — castings are transferred directly from furnace to quench without delay, ensuring the microstructure is locked in at the correct condition.

Full Documentation

Furnace charts, soak temperature and time records, quench details, and post-treatment hardness test data furnished with every solution-treated lot.

Specifications

Technical Specifications

A356 solution temperature1,000°F (538°C) ± 10°F — held to dissolve Mg₂Si and other precipitates
A356 soak timeMinimum 8–12 hours depending on section thickness
Quench mediaWater quench — 140–212°F (60–100°C) to minimize distortion on complex castings
T6 aging temperature310–320°F (155–160°C) for artificial aging / precipitation hardening
C95500 anneal temperaturePer MIL-B-21230 — 1,200°F (649°C) minimum; full soak and controlled cool
Temperature recordingChart recorder on all production runs; record retained with certification package

Need Solution Heat Treatment?

Solution treating is coordinated with casting and machining as part of your order. Contact us to discuss your alloy and specification requirements.

(973) 589-7575 — Ironbound Castings, Newark, NJ

Related Heat Treatments

Temper Annealing

Temper Annealing

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Stress Relieving

Stress Relieving

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Inspection & Certification

Inspection & Certification

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Ironbound Castings

Full-Service Foundry

(973) 589-7575Newark, NJ

Full-service foundry specializing in Bronze, Aluminum, Stainless Steel & Nickel Alloy sand castings with complete pattern shop, machining, and inspection capabilities.

Alloys Poured

  • Bronze Alloys
  • Aluminum Alloys
  • Nickel Alloys
  • Monel Alloys

Capabilities

  • Molding
  • Pattern Making
  • Heat Treating
  • Prototyping
  • Machining
  • Inspection & Certification

Industries Served

  • U.S. Navy & Defense
  • Oil & Gas
  • Power Generation
  • Industrial Manufacturing

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