Precision Stainless Steel Machining

Stainless Steel Custom Parts Manufacturing

Stainless steel is a high-performance iron alloy that combines exceptional strength with superior corrosion resistance. The addition of chromium (minimum 10.5%) and other elements like nickel and molybdenum creates a self-healing protective oxide layer, giving stainless steel its signature corrosion-resistant properties.

This versatile material maintains excellent mechanical properties under extreme conditions, from cryogenic temperatures to high-heat environments. Its high strength-to-weight ratio and exceptional durability make it ideal for demanding applications where reliability is crucial. The material's inherent resistance to oxidation and chemical corrosion ensures long-term performance in aggressive environments.

While stainless steel requires more specialized machining techniques than some metals, its outstanding material properties make it worth the investment. When properly machined, stainless steel produces components with excellent surface finishes and precise geometries. The material's high tensile strength and hardness result in components that maintain dimensional stability and resist deformation under load. These characteristics, combined with its natural resistance to corrosion, make it particularly valuable for applications in challenging environments where component failure isn't an option.

Benefits of using stainless steel for precision machined parts

Common stainless steel alloys we work with

There are two common series of stainless steel alloys: 3xx and 4xx.

The main difference between 300 and 400 series stainless steels lies in their composition and structure. 300 series (austenitic) stainless steels contain high nickel content, making them non-magnetic with superior corrosion resistance but unable to be hardened through heat treatment.

In contrast, 400 series (martensitic/ferritic) stainless steels contain little to no nickel, making them magnetic and heat-treatable but with lower corrosion resistance. While 300 series excels in corrosive environments and welding applications, 400 series provides better hardness and wear resistance at a lower cost, making each series optimal for different applications.

303 Stainless Steel

A free-machining austenitic stainless steel modified with sulfur for improved machinability. While offering good mechanical properties and moderate corrosion resistance, it's optimized for high-volume production where machining efficiency is crucial.

Material Cost: 7

Machining Cost: 5

Durability: 7

Corrosion Resistance: 6

Temperature Resistance: 7

Strength-To-Weight Ratio: 6

Typical Tolerances: ±0.002" to ±0.005"

304 Stainless Steel

The most versatile and widely used austenitic stainless steel. It offers excellent corrosion resistance, good formability, and strong welding characteristics. This general-purpose grade provides outstanding performance in mild to moderate corrosive environments.

Material Properties (Scale 1-10)

Material Cost: 7

Machining Cost: 7

Durability: 8

Corrosion Resistance: 8

Temperature Resistance: 8

Strength-To-Weight Ratio: 6

Typical Tolerances: ±0.002" to ±0.005"

316 Stainless Steel

A premium austenitic stainless steel containing molybdenum for enhanced corrosion resistance. Its superior performance in aggressive environments, particularly against chlorides and industrial chemicals, makes it ideal for marine and chemical processing applications.

Material Properties (Scale 1-10)

Material Cost: 8

Machining Cost: 8

Durability: 9

Corrosion Resistance: 9

Temperature Resistance: 8

Strength-To-Weight Ratio: 6

Typical Tolerances: ±0.002" to ±0.005"

316L Stainless Steel

A low-carbon variant of 316 that offers superior welding characteristics by preventing carbide precipitation at weld boundaries. It maintains the same excellent corrosion resistance as standard 316 while providing better intergranular corrosion resistance in welded structures.

Material Properties (Scale 1-10)

Material Cost: 8

Machining Cost: 8

Durability: 9

Corrosion Resistance: 9

Temperature Resistance: 8

Strength-To-Weight Ratio: 6

Typical Tolerances: ±0.002" to ±0.005"

321 Stainless Steel

A titanium-stabilized austenitic stainless steel designed for high-temperature applications. The titanium addition prevents chromium carbide formation at grain boundaries, making it ideal for applications requiring extended exposure to temperatures between 800-1500°F.

Material Properties (Scale 1-10)

Material Cost: 8

Machining Cost: 8

Durability: 8

Corrosion Resistance: 8

Temperature Resistance: 9

Strength-To-Weight Ratio: 6

Typical Tolerances: ±0.002" to ±0.005"

416 Stainless Steel

A free-machining martensitic stainless steel designed for high-speed machining. While offering moderate corrosion resistance, its excellent machinability makes it ideal for high-volume production of parts requiring good mechanical properties.

Material Properties (Scale 1-10)

Material Cost: 6

Machining Cost: 5

Durability: 8

Corrosion Resistance: 5

Temperature Resistance: 6

Strength-To-Weight Ratio: 7

Typical Tolerances: ±0.002" to ±0.005"

420 Stainless Steel

A high-carbon martensitic stainless steel capable of high hardness through heat treatment. It combines good corrosion resistance with excellent wear resistance, making it suitable for applications requiring both hardness and moderate corrosion resistance.

Material Properties (Scale 1-10)

Material Cost: 6

Machining Cost: 7

Durability: 9

Corrosion Resistance: 6

Temperature Resistance: 6

Strength-To-Weight Ratio: 8

Typical Tolerances: ±0.001" to ±0.003"

440C Stainless Steel

A high-carbon martensitic stainless steel offering maximum hardness in the 400 series. Its combination of high strength, hardness, and moderate corrosion resistance makes it ideal for bearings, valve components, and other wear-resistant applications.

Material Properties (Scale 1-10)

Material Cost: 7

Machining Cost: 8

Durability: 9

Corrosion Resistance: 6

Temperature Resistance: 6

Strength-To-Weight Ratio: 9

Typical Tolerances: ±0.001" to ±0.005"

17-4 PH Stainless Steel

A precipitation-hardening stainless steel that combines high strength with good corrosion resistance. Its ability to achieve high strength through relatively simple heat treatment while maintaining good machinability makes it valuable for critical components requiring both strength and corrosion resistance.

Material Properties (Scale 1-10)

Material Cost: 8

Machining Cost: 7

Durability: 9

Corrosion Resistance: 8

Temperature Resistance: 7

Strength-To-Weight Ratio: 9

Typical Tolerances: ±0.002" to ±0.010"

Common applications

Fluid & Gas Control Systems

Stainless steel excels in fluid and gas control applications due to its exceptional chemical resistance and ability to maintain integrity under high pressures. The material's outstanding corrosion resistance protects against aggressive media and harsh cleaning processes, while its high strength enables reliable performance in pressurized systems. Stainless steel's ability to maintain precise geometries in internal flow paths, combined with its resistance to pitting and crevice corrosion, makes it ideal for long-term reliability in critical flow control applications.

Common Applications:

• Valve bodies and components
• Pressure regulator parts
• Flow meter housings
• High-pressure fittings
• Manifold blocks
• Control system components
• Sample system components

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Measurement & Instrumentation

In precision measurement applications, stainless steel provides the dimensional stability and long-term reliability essential for accurate readings. Its resistance to environmental factors ensures measurement components maintain their critical dimensions and calibration over time. The material's high strength-to-weight ratio allows for robust yet precise instrument components, while its excellent corrosion resistance prevents degradation that could affect measurement accuracy. This combination makes stainless steel particularly valuable in applications where measurement integrity is crucial.

Common Applications:

• Pressure gauge components
• Sensor housings
• Calibration equipment parts
• Test point adapters
• Instrument fittings
• Temperature probe housings
• High-accuracy gauge parts

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Precision Hardware

Stainless steel's combination of high strength and corrosion resistance makes it ideal for precision hardware applications. The material maintains its mechanical properties across a wide temperature range and resists galling in threaded applications. Its ability to be heat treated for enhanced hardness, particularly in 400 series grades, provides excellent wear resistance for load-bearing components. The material's inherent durability ensures fasteners and precision components maintain their integrity even in demanding environments where component failure isn't an option.

Common Applications:

• Specialty fasteners
• Threaded inserts
• Guide pins and bushings
• Mounting brackets
• Alignment components
• Structural connectors
• High-strength assembly hardware

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Our stainless steel machining services

With over 75 years of precision machining excellence, we deliver custom stainless steel components that meet the most demanding specifications. From prototype development to multi-million piece orders, our ISO:9001 certified facility specializes in handling complex, high-difficulty work across all stainless steel grades.

Our commitment to quality, combined with extensive machining capabilities, ensures your stainless steel parts and components are manufactured to the highest standards with competitive lead times.

Core services

CNC Milling

Our advanced vertical and horizontal milling centers with up to 6-axis capabilities tackle the most challenging stainless steel components. We specialize in complex HVAC manifolds, precision pump housings, and intricate gauge components where tight tolerances are critical. Whether you need custom stainless steel parts for industrial power equipment or precision-machined components for instrumentation, our milling expertise covers all common grades including 303, 304, and 316 stainless steel.

Multi-Spindle Machining

Specialized in high-volume stainless steel production, processing bars up to 1-5/8" and chucking to 6". This service is ideal for large-quantity precision parts used in pressure gauges, thermometers, and industrial equipment. We help manufacturers maintain quality and efficiency in their supply chains through consistent, reliable production of complex stainless steel parts.

CNC Turning

Offering complete stainless steel turning services for bars up to 4" and chucking to 20" diameter. We excel in manufacturing custom stainless steel components for industrial pumps, precision valve parts, and critical power equipment components. Our turning capabilities serve diverse applications from high-pressure gauge components to custom HVAC parts for Parker Hannifin, delivering exceptional surface finishes and tight tolerances every time.

Swiss Machining

Precision Swiss turning for stainless steel bars up to 7/8" diameter and lengths to 4". This specialized service is perfect for small, intricate components used in pressure gauges, thermometers, and precision instrumentation. Our Swiss machining capabilities excel in producing the tight-tolerance, small-diameter parts that instrumentation manufacturers demand, with superior surface finishes and exceptional accuracy.

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Scalable production

Short lead times

Fair prices

ISO-9001 certified

Secondary processes

Range of materials

On-time delivery

75+ years in business

Advanced CNC machining

Rapid prototyping