ASTM B171 C46400 Naval Brass Tubesheet for Seawater & Marine Coolers - Precision Machined Copper Alloy Heat Exchanger Component

Yuhong Group: Precision Heat Exchanger Components – From Tubes to Tubesheets

Yuhong Group Co., Ltd. supplies complete thermal systems – shell & tube heat exchangers (TEMA heat exchanger designs), pressure vessels, and air coolers – as well as every critical internal component: Fin Tube, Furnace Tube, Heat Exchanger Tube, Stainless Steel Seamless Tube, Nickel Alloy Tube, Copper alloy tube, heat exchanger tubesheet, and heat exchanger tube bundle.

Shown in the attached photograph is one of our ASTM B171 C46400 naval brass tubesheets – a high‑strength, corrosion‑resistant copper alloy component designed for seawater and marine cooling applications.

Product Focus: Naval Brass Tubesheet – The Standard for Seawater Heat Exchangers

The heat exchanger tubesheet is one of the most critical pressure‑retaining components in any shell & tube heat exchanger. It anchors every tube in the bundle, separates the tube side from the shell side, and must withstand both mechanical tube expansion forces and operational pressure/temperature cycling.

Based on the image, this tubesheet exhibits:

• Material: ASTM B171 C46400 (naval brass / copper‑zinc‑tin alloy)

• Material type: Copper alloy tube sheet – specifically formulated for seawater resistance

• Machining: Precision‑drilled tube holes with grooves for mechanical tube expansion

• Marking: Clearly stamped with material identification ("ASTM B171 C46400 TUBESHEET") for full traceability

Why Naval Brass (C46400) for Tubesheets?

Key Components That Interface with This Tubesheet

Technical Highlights of Our Naval Brass Tubesheet

• Dezincification resistant: The tin and arsenic content prevents selective zinc leaching – the most common failure mode in ordinary brass.

• Precision drilling: Tube holes are drilled to exact diameter tolerances (typically +0.05/‑0.00 mm) to ensure consistent tube rolling.

• Grooved tube holes: Internal grooves (typically 2 or 3 grooves per hole) increase pull‑out strength of expanded tubes.

• Forged or rolled plate: We supply C46400 tubesheets as forged (for thick/high‑pressure) or rolled plate (for standard duties).

• Full traceability: Each tubesheet is stamped with material grade and inspection identification as shown in your photograph.

Knowledge Module: C46400 Naval Brass vs. Other Copper Alloy Tubesheets – Selection Guide

When to choose C46400 naval brass tubesheet:

• Cooling water is clean seawater or brackish water (not heavily polluted)

• Velocity is controlled (typically 1.5‑2.5 m/s through tubes)

• Ammonia is not present in the water (e.g., not downstream of fertilizer plants)

• You need a cost‑effective alternative to copper‑nickel for moderate seawater service

Common Applications for C46400 Tubesheets

• Shipboard heat exchangers: Engine jacket water coolers, lube oil coolers (seawater side)

• Coastal power plants: Auxiliary cooling water condensers, bearing coolers

• Desalination plants: Brine heaters, evaporator condensers

• Offshore platforms: Process coolers (where Cu‑Ni is often preferred, but naval brass used for less critical duty)

• Industrial chillers: Once‑through seawater cooling

Advantages of Ordering a C46400 Tubesheet from Yuhong Group

• Exactly to your drawing: We machine your dimension, hole pattern, groove specification, and bolt hole layout.

• Fast turnaround: Forged or plate blanks are machined typically within 2‑4 weeks.

• Any copper alloy: C46400, C70600, C71500, C44300 – all available.

• Component‑only or full bundle: We supply just the tubesheet – or the complete heat exchanger tube bundle (tubes, tubesheet, baffles, tie rods) assembled.

• Full documentation: Material test certificate (MTC), dimensional report, and (if required) PMI test report.

Knowledge Module: How to Specify a Replacement C46400 Tubesheet Correctly

To avoid costly mismatches, we need the following information (send any of these):

1. Original tubesheet drawing – best option. We duplicate hole pattern, thickness, OD, and groove locations exactly.

2. Old tubesheet (physical sample) – we can measure, reverse‑engineer, and machine a perfect match.

3. Exchanger data sheet – shell ID, tube OD & pitch, gasket details, bolt circle diameter.

Common errors to avoid with naval brass tubesheets:

• Wrong tube hole diameter – too tight and tubes cannot be inserted; too loose and rolled joints leak.

• Missing grooves – tubes will pull out under pressure or thermal cycling.

• Incorrect material – C46400 vs. C44300 vs. C70600 confusion. Always confirm alloy.

• Galvanic mismatch – Do not pair C46400 tubesheet with stainless steel tubes without isolating gaskets (risk of rapid galvanic corrosion).

Tube Hole Pattern & Groove Details for C46400 (per TEMA / ASME)

Component‑Only Supply – We Also Provide

If you need just parts (not a full exchanger), we supply:

• Heat exchanger tubes – copper alloy (C44300, C70600, C71500), cut to length, end‑prepared for rolling

• Fin tubes – for air coolers or waste heat recovery retrofits

• Baffles, tie rods, spacers – in naval brass or coated carbon steel

• Stainless Steel Seamless Tube, Nickel Alloy Tube – available separately for other applications

• Channel covers, gaskets, fasteners – complete spare parts packages

Typical Industries That Use C46400 Tubesheets

Get a Quotation for Your C46400 Tubesheet

To quote a naval brass tubesheet like the one in your photograph, send the following to jimmy@steelseamlesspipe.com:

• Drawing (PDF, scan, or hand sketch with key dimensions: OD, thickness, tube hole size & pitch, bolt circle)

• Or: send us your old tubesheet for reverse engineering (return shipping arranged)

• Material grade: C46400 (as shown) or other copper alloy

• Quantity required (1 piece or production run)

We will respond with a dimensional drawing for approval, price, and delivery schedule – typically 48 hours.