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LML Metal Products Ltd.No. D309, Yunchuang E Valley, No. 3 Huanshi West Road, Tangxia Town, Dongguan City, Guangdong,China
(86) 17833674102dlynn9527@gmail.com
Available Materials

CNC Machining in Stainless Steel

Chromium-alloyed steel resisting rust, acids, and heat scaling (>10.5% Cr essential).
Critical for sterile/aggressive environments: medical tools, marine hardware, chemical reactors.

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Home / Stainless Steel

Stainless Steel Materials

​Stainless steel is a durable, corrosion-resistant iron alloy containing at least 10.5% chromium, which forms a protective passive layer.​
  • * Excellent machinability
  • * High strength
  • * Hardness
  • * Heat tolerance
  • * Corrosion resistance
  • * Electrical conductivity
  • * Low weight
  • * Low cost
  • * Overall versatility

Description

Applications
Electrical wiring, Plumbing pipes, Architectural roofing, Heat exchangers
Strengths
Top electrical/thermal conductivity, Natural corrosion resistance, Easy to form
Weaknesses
Heavy vs. aluminum, Tarnishes (green patina), $$$ cost
Process compatibility
CNC machining (gummy), TIG welding, Forging, Tube bending
Surface Treatment
Nickel/chrome plating, Chemical patination, Clear anti-tarnish coating

Characteristics

Price
Stainless Steel has a wide range of applications from prototyping to automotive to aerospace.
Lead Time
<7 days
Wall Thickness
0.75mm
Tolerances
±0.125mm (±0.005″)
Max part size
200 x 80 x 100 cm

Available Stainless Steel Subtypes

SubtypesYield StrengthElongation at BreakHardness(Typical)MaximumTemp
SS30431,000 psi ≥205MPa≥40%Rockwell B70-907.93 g/cm², 0.286 lb/in³1,600°F
SS31630,000 psi ≥205MPa≥40%Rockwell B79-957.98 g/cm², 0.288 lb/in³1,600°F
SS43045,000 psi ≥310MPa≥20%Rockwell B75-887.70 g/cm², 0.278 lb/in³1,500°F
SS41060,000 psi20%Rockwell C22-287.75 g/cm², 0.280 lb/in³1,200°F
Duplex 220565,000 psi25%Rockwell C28-327.80 g/cm², 0.282 lb/in³600°F

Stainless steels for Machining

LML offers several stainless steel grades in its long list of available manufacturing materials. Two of those grades are especially well-suited material options for CNC machining, whether milling or turning: ​Stainless Steel 304​ and ​316.Stainless Steel 304: Benefits include good corrosion resistance, formability, and weldability. Widely used for food processing equipment, pharmaceutical components, and architectural hardware. See data sheet for more information.Stainless Steel 316: This alloy contains added molybdenum for enhanced corrosion resistance. Especially applicable in marine hardware, chemical processing equipment, and medical implants. See data sheet for more information.GET INSTANT QUOTE

Gallery of Stainless Steel Parts Manufactured by LML

The color of anodized finishes may exhibit some degree of variation due to standard alloy tolerance differences. Please refer to the color scheme below to observe the range of available colors.

Stainless Steel for Machining

​Mechanical Strength & Ductility​


Austenitic grades (304, 316) achieve tensile strength of ​515 MPa​ with 40% elongation, enabling complex forming without fracture.
Martensitic grades (410, 420, 440C) reach ​58-60 HRC​ post-heat treatment for high-wear components like bearings and cutting tools.
​Corrosion Resistance Mechanism​
Chromium (≥10.5%) forms a self-healing ​Cr₂O₃ oxide layer, resisting chemical/atmospheric corrosion critical for medical, marine, and chemical processing equipment.
Molybdenum addition in 316/L enhances pitting resistance in chloride-rich environments.
​Thermal Stability​
Maintains structural integrity up to ​750°C​ (austenitic) with low thermal expansion (17.5 µm/m·°C for 316), minimizing dimensional drift during machinin







Post-Machining Treatments

Passivation: Nitric acid bath removes iron contaminants, restoring Cr₂O₃ layer.
​Electropolishing: Achieves ​Ra 0.1 µm​ mirror finishes while enhancing corrosion resistance.
​Shot Peening: Induces compressive stresses to improve fatigue life in aerospace components.
​PVD Coatings: TiN/AlCrN for wear resistance in high-friction applications (e.g., valve seats

 Industry-Specific Applications

Medical: 17-4PH surgical tools (CNC-turned + electropolished) for biocompatibility
.
​Aerospace: 15-5PH landing gear parts machined via 5-axis milling with ±0.005mm tolerance
.
​Automotive: 304L fuel rails (deep-drawn + laser-welded) leveraging formability
.
​Energy: Inconel 625 turbine blades (slow EDM + abrasive flow machining)

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FAQs

LML takes the stress out of manufacturing by guaranteeing the quality and consistency of every part. Each order is dimensionally and visually inspected by our in-house quality control team to make sure it meets the LML Standard. If you’re not satisfied with your order, we’ll remake your parts as fast as possible, free of charge, or refund you - whichever you prefer.
  • Why 5-Axis CNC Machining Has Superior Advatages?
    "5-Axis" generally refers to the ability of a CNC machine to move the tool in five directions, which belongs to a high precision production technology.
  • GALLERY OF CNC MACHINED PARTS
    GALLERY OF CNC MACHINED PARTS
  • Could I have a look at your production facility for sliver contacts?
    Cold Heading & Stamping Workshop

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