Description

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316L stainless steel round bar is a low carbon version of 316 stainless steel (suffix 'L' stands for Low Carbon), optimized for welding and corrosion resistance by reducing the carbon content (≤0.03%), and is an austenitic stainless steel that is widely used in highly corrosive environments and welding applications. Chemical equipment: reaction kettle, pipeline weldments (acid and alkali resistant media).

Product Parameter (Specification)

Products description:

Product information	parameter	Product intormation	Parameter
Product name	Stainless steel round bar	Standard	ASTM, JIS, DIN, EN
Length	Customised to customer requirements	Certification	ISO, SGS
Grade-ASTM	201, 202, 302, 304, 304L, 310, 310S, 316, 316L, 321, 410, 431, 430F, 904L & other	Price term	FOB
Technique	Cold rolled hot rolled	Payment terms	T/T L/C
Packaging and delivery
Note : bundle, plastic bags, thin film, wooden pallet, standard seaworthy export packing or as customer demands

Product Feature and Application

316L stainless steel round bar's resistance to acid and alkali media allows it to be used in chemical equipment, such as reactors and pipeline weldments. Because of its resistance to chloride ion corrosion, it can be used in marine engineering as desalination devices, marine welding parts. In the medical field, implants, surgical instruments, resistance to radiation oxidation environment, as parts of nuclear fuel processing equipment.

Chemical and petroleum industry

Resistant to dilute sulfuric acid, phosphoric acid, acetic acid and other corrosive media, resistant to intergranular corrosion, suitable for high chloride ion environment, low carbon characteristics to avoid intergranular corrosion after welding, to extend the life of the equipment.

Marine engineering and shipbuilding

Propeller shafts, deck fasteners, seawater pump valves, cable joints, salt spray corrosion-resistant support structure, molybdenum (Mo) significantly enhance the resistance to chloride pitting, suitable for long-term immersion in seawater.

Medical and pharmaceutical industry

As implantable devices, such as artificial joints, bone nails (subject to ISO 5832-1/ISO 13485 biocompatibility standards). Low carbon reduces metal ion precipitation and ensures biosafety.

Architecture and Decoration

Used in coastal building structures, railings, bolts, salt spray corrosion resistance.

As high-end decorative sculpture, curtain wall support pieces, the surface can be brushed, mirror treatment, weak magnetic (after cold processing) does not affect the appearance, weather resistance.

Production Details

1.Material composition (ASTM A276 standard)

Major Elements:

Element	Cr	Ni	C	Mn	Si	S	P	Mo
Content(%)	16.0-18.0	10.0-14.0	MAX 0.03	MAX 2.0	MAX 1	MAX 0.03	MAX 0.045	2.0-3.0

2.Physical properties

Condition	Density	Melting point	Thermal conductivity	Resistivity
Data	7.98-8.03 g/cm³	1370-1400°C	21 W/m·K (at 500℃)	740-800 nΩ·m

Surface Treatment Options

Type	Description	Applicable Scene
Pickled surface	Matte grey-white, remove oxide skin	General industrial parts, subsequent processing
Polished surface	Mechanically polished to Ra≤0.8μm (mirror surface)	Medical devices, food equipment
Grinding surface	Precision grinding, dimensional tolerance ±0.02mm	Shafts, precision parts

FAQ

Q: What is the difference between 316L and 316 stainless steel round bar?

A: Core difference:
Carbon content: 316L (C ≤ 0.03%) vs 316 (C ≤ 0.08%).
Welding performance: 316L after welding without heat treatment (stronger resistance to intergranular corrosion), 316 need to anneal.
Cost: 316L due to tighter control of the process, the price is about 5-10% higher.
Selection recommendations:
Choose 316L: frequent welding, strong corrosive environment (such as seawater, chemical industry).
Choose 316: non-welding scenarios or common corrosion needs (reduce costs).

Q: Is 316L stainless steel heat resistant? What is the maximum degree it can be used?

A: Temperature resistance range:
Long-term use: ≤ 800°C (good oxidation resistance).
Short-term peak: ≤ 925°C (avoid sulphide environments).
High temperature limitations:
Significant reduction in strength above 800°C (tensile strength reduced by about 30% at 500°C).
Avoid contact with carbon steel at high temperatures (prevent carbon migration leading to corrosion).

Q: Can it be used in food or medical devices?

A: Food grade:
FDA compliant, requires surface polishing to Ra ≤ 0.8μm (to prevent bacterial residue).
Medical grade:
ISO 5832-1 or ASTM F138 certification required (biocompatibility, sterility).
Suitable for surgical instruments, orthopaedic implants (electrolytic polishing and deburring required).

Q: What do I need to be aware of when machining?

A: Cutting machining:
Tools: carbide or coated tools (avoid HSS).
Parameters: low RPM, high feed, with coolant (reduce sticking and thermal deformation of the tool).
Welding process:
Recommended TIG welding, protective gas (argon purity ≥ 99.99%).
Pickling + passivation treatment is required after welding (to restore corrosion resistance).
Cold forming:
Weak magnetism may occur after cold drawing/stamping, solid solution treatment (1050-1100℃ water cooling) is required to restore non-magnetic.

Q: How to deal with surface rust? How to prevent it?

A: Rust causes:
Surface contamination (iron filings, hand sweat) or long-term exposure to high concentrations of chlorides.
Treatment method:
Mild rust: stainless steel special cleaner or pickling paste wipe.
Heavy rust: mechanical polishing + passivation treatment (nitric acid solution soaking).
Preventive measures:
Clean the surface regularly, avoid mixing with carbon steel.
Apply anti-rust oil or cover with protective film when stored in humid environment.