AMS 5653 Solution‑Heat‑Treated 316L Stainless Steel | UNS S31603

AMS 5653 316L stainless steel bar offers 70 ksi tensile strength, excellent corrosion resistance, and superior weldability. Low-carbon design prevents sensitization. Ideal for aerospace fasteners, marine hardware, chemical processing, and medical devices. ZYTC Alloy is AS9120B and ISO 9001 certified.

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AMS 5653 / 316L Stainless Steel Bar

– Low-Carbon Austenitic Alloy for Corrosive & High-Temperature Service

AMS 5653 specification covers a corrosion- and heat-resistant steel (316L / UNS S31603) in the form of bars, wire, forgings, mechanical tubing, flash-welded rings, and stock for forging or flash-welded rings. 316L is the low-carbon version of the classic 316 stainless steel, offering enhanced resistance to intergranular corrosion after welding or exposure to elevated temperatures.

As a professional Chinese stainless steel supplier, ZYTC Alloy provides certified AMS 5653 316L bar, wire, forgings, and tubing with full material traceability and EN 10204 3.1 / 3.2 inspection certificates.

Available Product Forms

All materials are delivered in full solution‑heat‑treated status complying with AMS 5653 requirements.

Bars
Wire
Forgings
Mechanical tubing
Flash‑welded rings and forging stock

Custom dimensions, cut‑to‑length sizes and pre‑machined blanks are available upon request. Our in‑house metallurgy team supports non‑standard specification inquiries to match unique project drawings.

Relevant Reference Specifications

Cross‑reference industry standards for material qualification and procurement: AMS 5507 (Sheet / Strip / Plate 316L), AMS 5524 (Sheet / Strip / Plate 316), AMS 5573 Seamless Tube, AMS 5584 Seamless & Welded Tube, AMS 5648 Bar / Wire / Forging (316), AMS 5649 Bar / Wire / Forging (FM), QQ‑S‑763, MIL‑S‑5059, ASTM A240, ASTM A276, ASTM A479, ASTM F138 and other matching military and ASTM standards.

Chemical Composition

Element	Symbol	Nominal %
Chromium	Cr	18%
Nickel	Ni	11%
Columbium (Niobium)	Cb (Nb)	0.60%
Iron	Fe	Balance
Carbon	C	0.03% max
Molybdenum	Mo	2.0–3.0%

Chemical composition ranges are nominal. Consult the current issue of AMS 5653 for precise minimum/maximum requirements. ZYTC Alloy provides full mill test reports (MTRs) with certified chemistry for every order.

Physical & Mechanical Properties

Physical Properties:

Property	Metric	Imperial
Density	7.95 – 8.00 g/cm³	0.287 lb/in³
Modulus of Elasticity	193 GPa	28.0 × 10⁶ psi
Melting Range	1370 – 1400°C	2500 – 2550°F
Thermal Conductivity	16.3 W/m·K	113 BTU·in/hr·ft²·°F
Electrical Resistivity	0.74 µΩ·m	445 ohm-cir-mil/ft
Magnetic Properties	Non-magnetic (austenitic)	—

Mechanical Properties (Solution Heat Treated):

Property	Metric	Imperial
Tensile Strength (min.)	482 MPa	70 ksi
Yield Strength (0.2% offset, min.)	175 MPa	25 ksi
Elongation (min.)	30%	30%
Reduction of Area (min.)	40%	40%
Hardness (Brinell)	255 max.	255 max.
Hardness (Rockwell B)	95 max.	95 max.

Heat Treatment

316L is supplied in the solution heat treated (annealed) condition per AMS 5653 requirements. The solution annealing process involves heating to approximately 1900°F (1038°C) followed by rapid cooling. Unlike ferritic or martensitic stainless steels, 316L cannot be hardened by heat treatment. Its mechanical properties are achieved through cold working.

Typical Applications

Aerospace & Defense Aircraft fasteners, structural fittings, hydraulic system components, mounting brackets and welded assemblies that withstand high‑humidity and salt‑spray operating conditions.

Chemical & Industrial Processing Pump shafts, valve bodies, heat‑exchanger hardware, piping and fitting components exposed to acids, corrosive process fluids and aggressive chemical media.

Marine & Offshore Propeller shaft components, marine hardware and offshore platform equipment with excellent tolerance for seawater and chloride‑rich environments.

Medical & Pharmaceutical Surgical instrument parts, medical device components, food‑grade and pharmaceutical processing equipment requiring high purity and reliable biocompatibility.

High‑Temperature Service Furnace hardware, heat‑treatment fixtures and exhaust‑system components needing dependable oxidation resistance under elevated‑temperature cycles.

Every production batch from ZYTC Alloy undergoes strict quality inspection with complete material traceability, mill test reports and certification aligned with AMS 5653 requirements. Whether you need standard stocked sizes or custom‑fabricated semi‑finished parts, our technical specialists offer grade‑selection support for your operating temperature, corrosion environment and mechanical property targets.

Reach out today for datasheets, inspection documents and competitive project quotations.

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