Name: 316 Stainless Steel Bar
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316 Stainless Steel Bar

The 316 stainless steel bar is an austenitic stainless steel bar that is 2-3% higher in molybdenum (Mo) content than the 304 type. Its core characteristic is a significantly enhanced resistance to chloride ion corrosion (such as in seawater, salt spray, and acidic media), making it suitable for mechanical parts in more demanding corrosive environments.

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Product Introduction

316 Stainless Steel Bar is a premium austenitic stainless steel enhanced with 2-3% molybdenum to provide superior corrosion resistance, particularly against chlorides and acidic environments. Often referred to as "marine-grade stainless steel," 316 offers significantly better performance in corrosive conditions compared to standard 304, making it the material of choice for demanding applications in chemical processing, marine environments, pharmaceutical manufacturing, and coastal installations. The molybdenum addition improves resistance to pitting and crevice corrosion while increasing overall durability in aggressive service conditions.

Available in rounds, squares, flats, hexagons, and special shapes, 316 stainless steel bar combines enhanced corrosion resistance with excellent mechanical properties and machinability. Its robust performance in chloride-containing environments—including seawater, bleach solutions, and de-icing salts—makes it indispensable for marine hardware, offshore platforms, coastal construction, and chemical processing equipment. The grade maintains good high-temperature strength and oxidation resistance while offering the same hygienic, easy-to-clean surface characteristics that make stainless steel ideal for food, pharmaceutical, and biotechnology applications where product purity is paramount.

Product parameters

Item / Parameter	Specification for 316 Bar	Notes / Significance
Key Feature	The Molybdenum-Enhanced Premium Corrosion-Resistant Bar Stock. Superior resistance to chlorides, acids, and pitting/crevice corrosion for demanding service environments.	The optimal choice for corrosive environments where 304 stainless steel may fail prematurely.
Common Designations	UNS S31600 AISI 316 ASTM A276 (Stainless Steel Bars) ASTM A479 (Bars for Pressure Vessels) EN 1.4401, X5CrNiMo17-12-2 JIS SUS316	ASTM A276 Grade 316 is the primary specification for general bar applications.
Chemical Composition (Typical wt.%)	C: ≤ 0.08 Cr: 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	Molybdenum content (2-3%) is the critical differentiator from 304 grade.
Mechanical Properties	Tensile Strength: ≥ 515 MPa Yield Strength: ≥ 205 MPa Elongation: ≥ 40% Hardness: ≤ 217 HB Machinability: 60% of B1112 steel	Similar mechanical properties to 304, with slightly higher potential hardness and better machinability.
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; thermal expansion slightly lower.
Available Forms	Rounds: 3mm - 600mm diameter Squares: 3mm - 300mm Hexagons: 3mm - 100mm Flats: Various thicknesses and widths Special Shapes: Angles, channels, custom profiles	Comprehensive size range matching 304 availability.
Surface Conditions	Hot Finished: Mill scale surface Cold Finished: Bright smooth finish Centerless Ground: Precision ground Polished: Various polish grades Peeled/Turned: For improved machining	Various surface finishes for different application requirements.
Corrosion Resistance	Excellent: Superior to 304 in: Chloride environments, sulfuric/phosphoric acids, brine solutions, seawater, bleaching solutions.	PREN: 24-26 (vs 304: 18-20) - Pitting Resistance Equivalent Number
Temperature Limits	Continuous Service: Up to 870°C Intermittent Service: Up to 925°C Cryogenic Service: Excellent down to -196°C	Maintains corrosion resistance better than 304 at elevated temperatures.
Machining Characteristics	• Better machinability than 304 (60% vs 45%) • Improved chip breaking• Good surface finish achievable • Longer tool life than with 304	Molybdenum addition improves machinability compared to 304.
Key Standards	ASTM A276 316: Stainless Steel Bars ASTM A479 316: Bars for Pressure Vessels ASTM A484: General Requirements EN 10088-3: Stainless Steel Bars JIS G4303: Stainless Steel Bars ASME SA479: Code Construction	Comprehensive standardization for quality assurance.
Common Applications	• Marine Hardware: Boat fittings, propeller shafts, marine fasteners • Chemical Processing: Valve stems, pump shafts, agitators, reactor components • Pharmaceutical: Process equipment, tank fittings, sanitary components • Food Processing: Salt brine equipment, acidic food machinery, cutting surfaces • Architectural: Coastal building hardware, pool fittings, marine fixtures • Medical: Surgical instruments, implant components, medical devices • Oil & Gas: Offshore platform components, wellhead equipment, valve trim	Specifically selected for corrosive environments and chloride exposure.

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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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