316L Stainless Steel Round Bar: Sizes, Price & Supplier Guide

316L stainless steel round bar: A Practical Buying Guide

Looking for a reliable 316L stainless steel round bar supplier? Huaxiao Stainless keeps 100,000 tons of inventory, ships in 15 days, and is certified to ISO/TS16949. Before you request a quote, here is what actually matters when specifying and sourcing 316L stainless steel round bar.

Why Choose 316L Stainless Steel Round Bar

316L stainless steel round bar is the low-carbon version of 316, alloyed with 2-3% molybdenum. The molybdenum is what buys resistance to chloride pitting and crevice corrosion; the low carbon (0.03% max) is what prevents carbide precipitation at grain boundaries during welding, so fabricated parts do not suffer intergranular attack in service.

For machined components that will be welded and then exposed to seawater, brine, or chlorinated process fluid, 316L round bar is the standard answer. 304 will corrode; 316 without the L will sensitise at the weld.

Specifications, Sizes & Surface Condition

We supply 316L (UNS S31603) round bar to ASTM A276 / A479 and EN 10088-3. Diameters run from 3 mm to 400 mm, in 3 m and 6 m lengths or cut to your drawing.

• Condition: hot rolled, cold drawn, peeled, or centreless ground
• Surface: black, pickled, bright, or polished to Ra 0.4
• Tolerance: h9 / h11 on cold drawn, k12 on hot rolled
• Also available: square, hexagonal, flat and angle profiles

Typical properties: tensile 485 MPa minimum, yield 170 MPa minimum, elongation 40%, hardness HB 217 maximum. PREn is approximately 24-25, well above 304.

316L Stainless Steel Round Bar Price Factors

The 316L stainless steel round bar price per kg sits above 304 by roughly 25-40% and tracks two commodity inputs: nickel (10-14%) and molybdenum (2-3%). Molybdenum in particular can swing sharply, so quotes are usually valid for a short window.

• Processing: centreless ground bar costs more than cold drawn, which costs more than hot rolled
• Diameter: very small (under 6 mm) and very large (over 250 mm) bars both carry premiums
• Tolerance: tighter than h9 requires extra grinding
• Quantity: full-bundle pricing beats piece-cut pricing significantly

Tell us the machined diameter you actually need and we will advise the most economical starting stock size to reduce swarf loss.

Common Applications

316L round bar is machined into pump and valve shafts, marine fasteners and fittings, chemical pump impellers, food and dairy equipment parts, pharmaceutical process components, surgical and dental instruments, desalination hardware and offshore fasteners. It is also the go-to bar for architectural bolts in coastal buildings.

How to Choose a Reliable Supplier

Two checks separate genuine 316L from substitution risk. First, demand PMI verification on delivery: a handheld analyser confirms the molybdenum is actually present, and cheap 316 substitutes routinely fail this. Second, check the carbon figure on the certificate is at or below 0.030%, because plain 316 is often supplied against a 316L order.

A reliable 316L stainless steel round bar supplier welcomes both checks. Huaxiao Stainless maintains 100,000 tons of stainless stock, ships within 15 days, and holds ISO/TS16949 certification with full heat traceability from mill to your dock.

Frequently Asked Questions About 316L stainless steel round bar

Get a Quote for 316L stainless steel round bar

316L stainless steel round bar in stock: 100,000 tons available, 15-day delivery, certified to ISO/TS16949. Browse our 316L stainless steel round bar product page or contact us for a quote to get a competitive price today.