Is 303 suitable for marine applications?

Yes - 303 offers good corrosion resistance for marine and moderate outdoor environments. For maximum saltwater corrosion resistance, consider 316L.

303 has poor weldability. For applications requiring welding, consider 304L or 316L.

1500mm x 500mm x 500mm - suitable for large propeller hubs and custom components.

Sample 10-15 days. Batch 2-3 weeks. Rush service available.

Send drawings (PDF/STEP/IGS/DWG) with material, AMS specification, tolerance, threads, quantity. No drawing? Send sample/photo/sketch - free support.

30 days to report issue, solution in 7 days. Click 'Contact Supplier'.

Precision Turned Custom Parts for Propeller Hubs with 303 Steel

Name: Precision Turned Custom Parts for Propeller Hubs with 303 Steel
Brand: Dongguan Guanneng Precision Industry Co., Ltd.
SKU: 2311665005

Guangdong, ChinaDongguan Guanneng Precision Industry Co., Ltd.

US$5.00

100-999 Pieces

US$3.00

1,000-9,999 Pieces

US$1.00

10,000+ Pieces

Product profile

Customization

Available

Application

Fastener, Auto and Motorcycle Accessory, Hardware Tool, Machinery Accessory

Standard

GB, EN, China GB Code, JIS Code, TEMA, ASME

Surface Treatment

Powder Coated

Production Type

Mass Production

Machining Method

CNC Machining

Material

Nylon, Steel, Plastic, Brass, Alloy, Copper, Aluminum, Iron

Keywords 01

303 Stainless Steel Propeller Hubs

Keywords 02

Precision CNC Turned Marine Parts

Keywords 03

AMS 5640 Propeller Components

Keywords 04

Free-Machining Stainless Steel Hubs

Keywords 05

Custom Propeller Hub Machining

Keywords 06

Marine Propulsion System Parts

Keywords 07

Non-Magnetic Stainless Steel Components

Keywords 08

High Precision Turned Propeller Parts

Keywords 09

Boat Propeller Hub Hardware

Keywords 10

Aerospace Grade CNC Turned Parts

Transport Package

Individual Packing + Wooden Case

Specification

OD68*L900mm

Trademark

GGN

Origin

China

HS Code

8466939000

Production Capacity

1000PCS

Key features

AMS 5640 Compliance: Meets aerospace material specifications for bars, wire, and forgings.

High Precision Tolerance: Achieves +/-0.003mm tolerance on critical features for propeller hubs.

Excellent Machinability: 78% of B1212 rating enables high-speed production of complex geometries.

Non-Magnetic Properties: Annealed 303 steel is non-magnetic, ideal for sensitive marine and aerospace use.

Customization Options: Offers full customization, minor customization, and flexible customization from designs.

Fast Lead Time: Samples in 10-15 days; batch production in 2-3 weeks with rush service available.

100% Inspection: Complete inspection with free reports and material traceability (EN 10204 3.1).

Advanced Surface Finish: Precision surface roughness down to Ra 0.2um with passivation and electropolishing.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceFast Delivery

Dongguan Guanneng Precision Industry Co., Ltd.

Guangdong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 8 Years CertifiedNearest Port: Shenzhen PortAverage Response Time: ≤0.89h

AI-Powered supplier vetting

SummaryDongguan Guanneng Automation Technology Development Co., Ltd. is a China-based combined business entity identified in one record as a trade company, operating in Dongguan, Guangdong. It reports more than 15 years of machining-industry experience, while the company establishment date provided is 2018. Its stated capabilities include CNC machining, milling, grinding, wire cutting, turning, testing, assembly, and after-sales service. The supplier reports its own factory, multiple production lines, more than 10 production lines, and ISO9001:2015 certification. It serves machining, biomedical, automotive, semiconductor, automation, and petroleum machinery industries, and exports to East Asia, Europe, and North America. Lead times are stated as within 15 working days in both off-peak and peak seasons. Evidence is insufficient to assess financial credibility, innovation output, formal outsourcing or contract controls, overseas warehousing, traceability, or named customer cases. The audit record is dated November...

CertificationsThe supplier reports holding an ISO9001:2015 certificate and describes a dedicated quality control department and strict ISO9001-based production management system. A BV audit is also recorded for November 9, 2023 through November 8, 2024, although the audit result is listed as 0 without an explained scale.

After-Sales capabilityThe company description explicitly includes after-sales service among its integrated activities and states that it serves domestic and overseas enterprises. However, the records provide no specific response process, service coverage, repair policy, or overseas service infrastructure; overseas warehouse and showroom capabilities are marked unknown.

Production capacityThe supplier reports more than 15 years of machining-industry experience, its own factory, multiple production lines, and more than 10 production lines. It lists CNC machining, milling, grinding, wire cutting, and turning capabilities, serves several industrial sectors, and states lead times within 15 working days in both peak and off-peak seasons.

Customization capabilityThe product and service descriptions cover precision CNC machining, CNC turning, grinding, wire cutting, machinery parts, testing, and assembly. The supplier states that its production lines can meet different product needs and requirements, supporting customization, although no detailed engineering workflow, tolerance range, tooling policy, or sample-development evidence is provided.

Product Q&A

Q:Manufacturer or trading company?

Direct manufacturer - 6,000 sqm, 17 years, 40+ CNC machines, ISO9001, 3D CMM.

Q:What is 303 stainless steel?

Free-machining austenitic stainless steel with sulfur added to enhance machinability. The most readily machinable of all austenitic stainless steels. AMS 5640 compliant.

Q:Why is 303 preferred for propeller hub components?

Excellent machinability for complex hub geometries, AMS 5640 compliance, high dimensional stability, and non-magnetic properties.

Q:What is the machinability rating of 303?

Approximately 78% of free-cutting carbon steel (B1212).

Q:What aerospace specifications does 303 meet?

AMS 5640 and ASTM A582.