316L Stainless Steel Bar
316L stainless steel bars are the low-carbon version of 316 stainless steel bars. The core feature is that the carbon content is strictly controlled at ≤ 0.03%, which enables them to have excellent welding performance and intergranular corrosion resistance. They are the preferred choice for mechanical parts in harsh corrosive environments involving welding.
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Product Introduction

316L Stainless Steel Bar represents the pinnacle of corrosion-resistant austenitic stainless steel bar stock, combining the molybdenum-enhanced protection of 316 grade with the low-carbon advantage of "L" grades. With maximum carbon content of 0.03% and 2-3% molybdenum, this dual-enhanced alloy delivers exceptional resistance to sensitization during welding while providing superior defense against chlorides, acids, and pitting corrosion. This combination makes 316L the material of choice for critical applications where welding integrity and maximum corrosion resistance are non-negotiable, particularly in pharmaceutical, biotechnology, chemical processing, and marine environments.

Available in rounds, squares, flats, hexagons, and special shapes, 316L stainless steel bar offers unparalleled performance in aggressive environments while eliminating the need for post-weld heat treatment. The low carbon content ensures that machined and welded components maintain their full corrosion resistance without chromium carbide precipitation, while the molybdenum addition extends service life in chloride-rich environments where other materials would rapidly deteriorate. This grade is particularly valuable for high-purity systems, sterile processing equipment, and applications requiring extensive machining, welding, or exposure to both corrosive media and elevated temperatures.

Product parameters


Item / Parameter

Specification for 316L Bar

Notes / Significance

Key Feature

The Ultimate Dual-Protection Bar Stock Alloy. Combines molybdenum-enhanced corrosion resistance with low-carbon weldability for maximum performance in critical applications.

The gold standard for demanding environments requiring both welding integrity and extreme corrosion resistance.

Common Designations

UNS S31603
AISI 316L
ASTM A276 (Stainless Steel Bars)
ASTM A479 (Bars for Pressure Vessels)
EN 1.4404, X2CrNiMo17-12-2
JIS SUS316L

ASTM A276 Grade 316L is the primary specification for critical bar applications.

Chemical Composition (Typical wt.%)

C: ≤ 0.030Cr: 16.0 - 18.0
Ni: 10.0 - 14.0
Mo: 2.0 - 3.0Mn: ≤ 2.00
Si: ≤ 1.00
P: ≤ 0.045
S: ≤ 0.030

Critical combination: ≤0.03% Carbon + 2-3% Molybdenum for dual protection.

Mechanical Properties

Tensile Strength: ≥ 485 MPa
Yield Strength: ≥ 170 MPa
Elongation: ≥ 40%
Hardness: ≤ 217 HB
Machinability: 60% of B1112 steel

Slightly lower yield strength than standard 316, but superior corrosion performance.

Physical Properties

Density: 7.98 g/cm³
Melting Range: 1375 - 1400 °C
Thermal Expansion: 16.0 × 10⁻⁶/K (20-100°C)
Thermal Conductivity: 16.2 W/m·K (100°C)
Non-magnetic when annealed

Slightly denser than 304/304L due to molybdenum content.

Available Forms

Rounds: 3mm - 600mm diameter
Squares: 3mm - 300mm
Hexagons: 3mm - 100mm
Flats: Various thicknesses and widths
Special Shapes: Custom profiles as required

Comprehensive size range matching 316 availability.

Surface Conditions

Hot Finished: As-rolled, mill scale
Cold Finished: Bright, smooth surface
Centerless Ground: Precision dimensions
Polished: Various polish grades
Peeled/Turned: For improved machining

Various finishes available for specific industry requirements.

Corrosion Resistance

Superior: Excellent resistance to chlorides, acids, pitting, and crevice corrosion. Maintains full corrosion resistance in welded conditions.

PREN*: 25-27 - Higher than 316 due to better microstructural stability.

Welding Advantages

• No Sensitization in HAZ
• No Post-Weld Annealing required
• Maintains Corrosion Resistance• Suitable for Thick Sections• All Standard Methods applicable

Eliminates costly post-weld treatments and ensures long-term reliability.

Machining Characteristics

• Better machinability than 304L (60% vs 45%)
• Good chip formation• Excellent surface finish achievable
• Requires proper tooling and techniques

Molybdenum addition improves machinability; proper tool selection important.

Key Standards

ASTM A276 316L: Stainless Steel Bars
ASTM A479 316L: Bars for Pressure Vessels
ASTM A484: General Requirements
EN 10088-3: Stainless Steel Bars
JIS G4303: Stainless Steel Bars
ASME SA479: Code Construction
3-A Sanitary Standards

Meets both general and specialized industry standards.

Common Applications

• Pharmaceutical/Biotech: Process equipment, tank fittings, agitator shafts, valve bodies
• Chemical Processing: Reactor components, pump shafts, valve stems, corrosive service parts
• Marine/Offshore: Propeller shafts, marine hardware, offshore platform components
• Food & Beverage: Salt brine equipment, acidic food machinery, cutting blades
• Medical Devices: Surgical instruments, implant components, medical equipment
• Semiconductor: Wafer handling components, chemical distribution parts
• Nuclear: Moderator system components, auxiliary equipment parts

Specifically selected where both corrosion resistance and weld integrity are critical.

Surface selection

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Packaging and transportation

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FACTORY SHOW

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FAQ

Q:What about your price? 
A:Our price is very competitive because we are a factory. Feel free to contact us if you are interested in our products. 

Q:Can I go to your factory to visit?
A:Of course, we welcome customers from all over the world to visit our factory.

Q:What product information do I need to provide?
A:You need to provide the grade, width, thickness, coating and the number of tons you need to purchase. 

Q:Does the product have quality inspection before loading? 
A:Of course, all our products are strictly tested for quality before packaging, and unqualified products will be destroyed.we
accept the third party inspection absolutely. 

Q:How about the delivery time? 
A:Within 3-15 days after we confirm you requirement. 

Q:What is your terms of payment ?
A:T/T, L/C at sight, Cash, Western Union are all accepted if you have other payment,please contact me. 

Q: Do you provide samples? 
A:Yes,we could offer the sample for you to test but please pay freight fee.

Q:How do we trust your company? 
A:We are a specialized company focusing on global steel trading and supply chain services. Our mission is to provide high-quality, multi-specification, and one-stop steel products and solutions to customers worldwide.

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