AMS 5645 Stainless Steel 321 Round Bar Supplier
Stainless Steel 321 Round Bars — AMS 5645 & EN X6CrNiTi18-10 Compliant — The Heat Exchanger Industry's Favourite — Multinox Inc.
Multinox INC is the largest professional 321 Stainless Steel Round Bars Suppliers in India. We are known for producing and supplying SS 321 Bars & 321 SS Rods that meets various national and international standards ASTM, IS, DIN, JIS, ASME and many more.
We offer Stainless Steel 321 Round Bars which has a better inter-granular corrosion resistance. This allows our clients to use SS 321 Round Bars in Thermal oxidisers, refinery equipments etc. This 321 grade steel Round Bars has been fabricated from the best quality raw materials to guarantee higher strength. We strive to deliver SS 321 Forged bars to be used mainly in the plumbing, building and chemical industries.
Our product line including products like Stainless Steel 321 Round Bars, Stainless Steel 321 Square Bars and 321 Stainless Steel Flat Bars are accessible in different sizes and specifications, to suit the needs of our clients. We supply SS 321 Square Bars and SS 321 Polished Round Bars for applications in jet engine parts, exhaust manifolds and turbo superchargers. 321 Stainless Steel Threaded Bars are products of choice for applications in the temperature range of up to about 900°C.
Our SS 321 Round Bars is most common and widely used Grades of Stainless Steel Round Bars that are accessible to our valuable customers in a varied range of diameters, wall thicknesses and sizes, and also in customized form that meets their specifications and requirements. Our products are packaged in such a manner that they are not damaged throughout transit. We are a highly competent ISO certified company which offers these products at quite affordable rates. Contact us now to request a quote!
Available Forms & Types
Most Common
Round Bars
Cold drawn, centreless ground & polished. Used in shafts, fasteners, machined components.
- OD: 4mm to 500mm
- Bright / Polish / Black finish
- Length: 1–6 metres
Precision
Hex Bars
Across-flat 18mm–57mm. Ideal for bolt, nut & valve body machining applications.
- 18mm – 57mm A/F
- Cold drawn condition
- Non-magnetic grade
Structural
Square Bars
Used in structural fabrication, tooling and engineering. Custom sizes available.
- 18mm – 47mm
- Bright / Rough Turned
- Custom sizes on request
Wide Range
Flat Bars
Width ½" to 10", thickness 2mm to 150mm. Sheared & edged or hot-rolled condition.
- Width: ½" to 10"
- Thickness: 2–150mm
- Custom width available
Hollow
Hollow Bars
Seamless hollow bar for bushings, sleeves & valve bodies. Saves machining time.
- OD: 4mm to 100mm
- Various wall thickness
- Centreless ground
High Strength
Forged Bars
Hot forged for superior grain structure. Heavy-duty industrial and aerospace use.
- 15mm to 300mm
- Ultrasonic tested
- Rough turned finish
ASTM A276 Stainless Steel 321 Round Bar — Specifications
Shafts, fasteners or welded assemblies — Stainless Steel 321 Round Bars arrive cut-to-length with complete UNS S32100 certification.
| Grade | SS 321/321H |
| Specification | EN, DIN, JIS, ASTM, BS, ASME, AISI, IS |
| Standard | ASTM A276/ASME SA276, ASTM A479/ASME SA479 & ASTM A164/ASME SA164 |
| Round Bars | Outside Diameter in the range of 4mm to 500mm above as per the customer requirement. |
| Round Bars | Outside Diameter in the range of 4mm to 500 mm above as per the customer requirement. |
| Hex Bars | 18mm – 57mm (11/16″ to 2-3/4″) above as per the requirement. |
| Square Bars | 18mm – 47mm (11/16″ to 1-3/4″) above as per the requirement. |
| Flat Bars | 1/2” to 10” in thickness range of 2mm to 150mm |
| Length | 1 to 6 Meters, Custom Cut Lengths |
| Finish | Black, Bright. Peeled and Polished, Solution annealed. |
| Technique | Hot Rolled, Cold Rolled, Cold Drawn, Forged Round Bar, Rod |
| Tolerance | H8, H9, H10, H11, H12, H13K9, K10, K11, K12 or as per clients’ requirements |
Chemical Composition of ASTM A479 Stainless Steel 321 Round Bar
The stabilised chemistry of Stainless Steel 321 Round Bars means post-weld corrosion never becomes your problem — even without solution annealing.
Ni
9 – 12%
Nickel
C
0.08 max
Carbon
Mn
2.0 max
Manganese
P
0.045 max
Phosphorus
S
0.030 max
Sulphur
Si
1.0 max
Silicon
Cr
17 – 19%
Chromium
Fe
Balanced
Iron
view Equivalent Grades of Stainless Steel 321 Round Bar
Stainless Steel 321 Round Bars hold documented identities across American, German and European standards — sourcing never stalls.
Grade
SS 321
Material
UNS
S32100
UNS
EN
X6CrNiTi18-10
European Standard
WNR
1.4541
Werkstoff No.
JIS
SUS 321
Japanese Standard
Mechanical Properties — AMS 5645 Stainless Steel 321 Round Bar
Aircraft exhausts, thermal reactors, expansion joints — Stainless Steel 321 Round Bars handle thermal cycling that breaks lesser stainless.
| Property | Values |
|---|---|
| Elongation | 35% |
| Tensile Strength | MPa-515,Psi-75000 |
| Yield Strength | MPa-205, Psi-30000 |
UNS S32100 Round Bar — Tolerance Chart
| Size, Dia in mm | >6 – ≤18 | >18 – ≤30 | >30 – ≤50 | >80 – ≤120 | >180 – ≤250 | >315 – ≤400 |
|---|---|---|---|---|---|---|
| Permitted Variation (mm) | +0 / −0.070 | +0 / −0.085 | +0 / −0.100 | +0 / −0.140 | +0 / −0.185 | +0 / −0.230 |
Recent ASTM A479 Stainless Steel 321 Round Bar Export Deliveries
🇸🇦
Saudi Aramco Total
Al Jubail, Saudi Arabia
25mm Diameter Bright Bars, Stainless Steel 321
Delivered in 7 days
🇺🇸
Hess Corporation
New York City, USA
UNS S32100 Peeled Bars, 50mm Diameter
Delivered in 14 days
🇬🇧
Shell PLC
London, United Kingdom
EN X6CrNiTi18-10 Polished Bars, 20mm Diameter
Delivered in 14 days
🇦🇪
ADNOC
Abu Dhabi, UAE
Cold Drawn Bars, 16mm Diameter, Stainless Steel 321
Delivered in 5 days
🇿🇦
Sasol Limited
Johannesburg, South Africa
100–200mm Diameter Hot Rolled Bars, Stainless Steel 321
Delivered in 21 days
🇩🇪
BASF SE
Ludwigshafen, Germany
WNR 1.4541 Turned Bars, 40–80mm Diameter
Delivered in 18 days
stock Availability of EN X6CrNiTi18-10 Round Bar
| Stainless Steel 321 Bright Round Bar | UNS S32100 Black Round Bar |
| WNR 1.4541 Polished Round Bar | EN X6CrNiTi18-10 Peeled Round Bar |
| ASTM A276 Stainless Steel 321 Turned Round Bar | AMS 5645 Stainless Steel 321 Ground Round Bar |
| UNS S32100 Hot Rolled Round Bar | WNR 1.4541 Cold Drawn Round Bar |
| EN X6CrNiTi18-10 Bright Round Bar | ASTM A479 Stainless Steel 321 Black Round Bar |
| Stainless Steel 321 Polished Round Bar | UNS S32100 Peeled Round Bar |
| WNR 1.4541 Turned Round Bar | EN X6CrNiTi18-10 Ground Round Bar |
| AMS 5645 Stainless Steel 321 Hot Rolled Round Bar | Stainless Steel 321 Cold Drawn Round Bar |
| UNS S32100 Bright Round Bar | WNR 1.4541 Black Round Bar |
| EN X6CrNiTi18-10 Polished Round Bar | ASTM A479 Stainless Steel 321 Peeled Round Bar |
UNS S32100 Round Bar — Check Latest Prices
Multinox INC offers WNR 1.4541 Round Bars at one of the most competitive prices in India. Request the latest Pricelist using the contact form here.