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Stainless Steel CNC Machining Services in China - Reliable Suppliers and Quality Factory Manufacturing
Specialized Stainless Steel Material Library
We maintain a full inventory of austenitic, martensitic, precipitation-hardening, and specialty stainless steels to meet the most demanding mechanical performance and corrosion resistance requirements:
303 Stainless Steel
A free-machining austenitic stainless steel with excellent machinability, ideal for high-volume automated parts, threaded components, and fittings requiring good corrosion resistance.
304/304L (18-8) Stainless Steel
The most versatile austenitic stainless steel, offering superior corrosion resistance, formability, and weldability. Widely used in food processing, chemical, medical device, and general machinery applications.
316/316L Stainless Steel
Molybdenum-enhanced austenitic stainless steel with significantly better resistance to chloride corrosion and pitting than 304 series. The preferred choice for marine environments, chemical equipment, high-end medical devices, and pharmaceutical industries.
416 Stainless Steel
A free-machining martensitic stainless steel that achieves higher strength through heat treatment. Suitable for shafts, gears, and valve components requiring good machinability along with moderate strength and corrosion resistance.
17-4 PH (630) Stainless Steel
The most widely used precipitation-hardening stainless steel. It achieves high strength (up to H1100 condition) through aging treatment while maintaining good corrosion resistance. Ideal for aerospace, marine, and high-stress structural applications.
15-5 PH Stainless Steel
An improved precipitation-hardening stainless steel with performance similar to 17-4 PH, but offering better transverse toughness and dimensional stability during heat treatment.
410 & 420 Stainless Steel
General-purpose martensitic stainless steels. 410 offers moderate strength and corrosion resistance; 420, with higher carbon content, achieves greater hardness through heat treatment. Commonly used in cutlery, shafts, molds, and wear-resistant parts.
440C Stainless Steel
A high-carbon, high-chromium martensitic stainless steel with the highest hardness among stainless steels (can be hardened to HRC 58+). Exceptional wear resistance makes it ideal for high-end bearings, valve components, surgical instruments, and cutlery.
Nitronic 60 (218 SS)
A high-performance nitrogen-strengthened austenitic stainless steel offering an exceptional combination of high wear resistance, strength, and corrosion resistance. Particularly suitable for critical applications involving galling and seizing resistance, such as bearings, valve seats, bushings, and food processing equipment.
Frequently Asked Questions (FAQ)
Which stainless steel is best for marine environments?
316/316L Stainless Steel is the preferred choice for marine environments. Its molybdenum-enhanced composition provides significantly better resistance to chloride corrosion and pitting compared to the 304 series.
What is the highest hardness stainless steel available in your library?
440C Stainless Steel offers the highest hardness among our stainless steels. It is a high-carbon, high-chromium martensitic stainless steel that can be hardened to HRC 58+ for exceptional wear resistance.
Which stainless steel is ideal for high-volume automated machining?
303 Stainless Steel is highly recommended for high-volume automated parts. It is a free-machining austenitic stainless steel known for its excellent machinability.
What makes 17-4 PH different from other stainless steels?
17-4 PH (630) is a precipitation-hardening stainless steel. Unlike standard grades, it achieves exceptional high strength (up to H1100 condition) through specialized aging treatment while still maintaining good corrosion resistance.
Which material should I choose to prevent galling and seizing?
Nitronic 60 (218 SS) is specifically designed for this purpose. It is a nitrogen-strengthened austenitic stainless steel that offers an exceptional combination of galling and seizing resistance, making it perfect for bearings, valve seats, and bushings.
Finishes and Post-Processing Options
The zinc alloy substrate is highly suitable for various surface treatments to enhance decoration, protection, or functionality:
Electroplating: Such as chrome, nickel, gold, or silver plating, providing a highly decorative appearance, excellent wear and corrosion resistance. This is the most common choice.
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Passivation or Chromate Conversion Coating:
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Powder Coating:
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Painting:
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Physical Vapor Deposition (PVD):
Design and Machining Considerations
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Process Selection:
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Design Considerations:
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Material Selection:
Zamak 3 and 5 are suitable for the vast majority of general-purpose parts requiring good appearance and strength; ZA-8 is better for wear and bearing applications; for making rapid tooling, choose specialized alloys like Kirksite.
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