Gun Barrel Breech Ring

Name: Gun Barrel Breech Ring | Firearm Chamber Locking Component - Frigate
Price: 249.00 USD
Availability: InStock

Gun Barrel Breech Ring facilitates direct axial load transfer from the cartridge case to the recoil mechanism. The ring is engineered to withstand primary firing shock and recoil forces without inducing localized stress concentrations in the barrel extension. Material selection, ring geometry, and engagement profiles are optimized to ensure repeatable energy absorption across ballistic cycles.

Material Specification

4340 Alloy Steel (MIL-S-5000) or 300M Steel (AMS 6419)

Dimensional Accuracy

±0.005mm (bore diameter), ±0.01mm (critical surfaces)

Surface Finish

Ra ≤ 0.4μm (bearing surfaces), ≤1.6μm (non-critical)

Hardness Requirement

36-42 HRC (core), 55-60 HRC (case hardened surfaces)

Heat Treatment

Vacuum hardened and triple tempered (AMS 2759/10)

Product Description

Gun Barrel Breech Ring is manufactured using high-grade quenched and tempered alloy steels exhibiting uniform grain structure and minimal segregation. Thermal cycling during rapid fire induces complex microstructural changes, which the breech ring resists through controlled alloying and post-process normalization. Phase stability and low retained austenite levels reduce distortion and fatigue propagation.

Pressure Containment Rating

80,000 PSI sustained (proof tested to 120% operational pressure)

Certification Standard

MIL-B-11595, NATO AQAP 2110, ITAR controlled

Non-Destructive Testing (NDT)

100% Ultrasonic (ASTM E428), 100% MPI (MIL-STD-1949)

Recoil Load Capacity

Minimum 250,000 cycles at 25,000 lbf impulse loading

Thread Specifications

Interrupted buttress thread form, Class 1 Fit (MIL-S-5942)

Technical Advantages

Gun Barrel Breech Ring maintains strict axial and radial alignment with the barrel chamber to ensure minimal deviation of the projectile path. Machined concentricity tolerances are kept within sub-50 micron levels to avoid shot dispersion due to misalignment. The interface fit prevents rotational slip and maintains firing axis under continuous vibration and thermal expansion.

Gun Barrel Breech Ring interfaces are treated with diffusion-based surface hardening techniques such as plasma nitriding or ferritic nitrocarburizing. These treatments reduce wear at locking surfaces and resist high-velocity gas erosion during firing. Surface hardness profiles are engineered to provide a transitional gradient to avoid sub-surface crack initiation during pressure fluctuations.

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Industry Applications

Towed Artillery Systems

Gun Barrel Breech Ring ensures axial load transfer and chamber sealing during high-pressure discharge in mobile field howitzers and cannons.

Self-Propelled Gun Platforms

Gun Barrel Breech Ring provides recoil energy distribution and structural reinforcement under dynamic vehicle-mounted artillery recoil loads.

Naval Gun Systems

Gun Barrel Breech Ring maintains thermal stability and mechanical engagement in large-caliber shipboard cannons operating in corrosive marine environments.

Main Battle Tank Armament

Gun Barrel Breech Ring enables secure breech locking and pressure containment in high-rate, high-recoil smoothbore and rifled tank guns.

Ballistic Testing Rigs

Gun Barrel Breech Ring ensures consistent bore axis alignment and pressure chamber integrity in controlled live-fire laboratory validation setups.

Coastal and Fixed Artillery Installations

Gun Barrel Breech Ring supports static gun mountings subjected to cyclic loading and high ambient thermal variations over prolonged service cycles.

Thermoelastic Compensation for Expansion Mismatch

Gun Barrel Breech Ring tolerances are engineered to accommodate thermal gradients between barrel shank and housing components. The design integrates controlled clearance expansion bands and stress-relief cutouts to prevent locking seizure or dimensional interference during sustained elevated firing temperatures. Material coefficients are matched to adjacent barrel assemblies to reduce differential distortion.

Gun Barrel Breech Ring incorporates anti-rotation features such as tangs, lugs, or keyed interfaces that prevent relative movement between the barrel and breech housing during recoil recovery. These mechanisms limit backlash and preserve chamber geometry. Torque values for mechanical fitment are calculated based on joint preload and operational torque harmonics.

Having Doubts? Our FAQ

Check all our Frequently Asked Question

How does Frigate ensure dimensional stability of Gun Barrel Breech Rings after heat treatment?

Frigate uses precision-controlled heat treatment cycles with soak and quench parameters optimized for low distortion. Post-treatment, each Gun Barrel Breech Ring undergoes CNC finish machining to restore critical tolerances. Coordinate Measuring Machines (CMMs) verify dimensional consistency. This guarantees concentricity and flatness are maintained within design limits.

What fatigue assessment methods does Frigate use for Gun Barrel Breech Ring validation?

Frigate performs finite element fatigue simulations based on real firing load profiles. High-cycle and low-cycle fatigue limits are assessed using notch-sensitive test coupons. Rings are validated for crack initiation resistance at geometric discontinuities. This ensures the breech ring can endure repeated ballistic loads without failure.

How does Frigate maintain surface integrity of Gun Barrel Breech Rings in corrosive environments?

Fregatte applies ferritic nitrocarburizing to improve corrosion and wear resistance at the locking surfaces. Surface depth and case hardness are confirmed through microhardness testing. Rings used in naval or humid zones receive additional anti-corrosion coatings. These treatments prevent erosion, fretting, and pitting during service.

What methods does Frigate use to ensure proper interference fit between Gun Barrel Breech Ring and barrel shank?

Frigate designs the interference fit based on thermal expansion calculations and material modulus. Rings are shrink-fitted under controlled temperatures to avoid overstressing. Each fit is verified with plug gauges and ultrasonic interface integrity checks. This ensures zero movement under firing-induced vibrations.

How does Frigate address axial stress concentration in Gun Barrel Breech Ring geometry?

Frigate uses smooth radius transitions and optimized fillet geometries to minimize stress risers. 3D FEA modeling identifies zones of peak axial stress under recoil conditions. Geometry is modified to distribute load paths evenly. This reduces the risk of crack initiation during peak impulse events.

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