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321 Stainless Steel Round Bar/Rod

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321 Stainless Steel Round Bar: Manufacturer & Supplier in India

321 Stainless Steel Round Bar/Rod

Sachin Steel Center is a trusted 321 stainless round bar supplier and 321 round bar manufacturer in India, providing high-quality stainless steel rods to meet diverse industrial needs. Our 321 SS round bars and rods are precision-engineered from austenitic stainless steel alloy with titanium stabilization, offering superior resistance to carbide precipitation during welding. This ensures excellent durability, strength, and oxidation resistance in high-temperature and corrosive environments.

Our 321 stainless steel rods are ideal for forming, drawing, and fabrication applications, delivering consistent performance across sectors like chemical processing, petrochemicals, power generation, aerospace, and food processing. With a focus on quality, each 321 SS round bar undergoes rigorous testing for tensile strength, hardness, and corrosion resistance before being dispatched.

At Sachin Steel Center, we cater to both standard and customized sizes, ensuring precise dimensions to meet your operational requirements. Our efficient supply chain and ready stock allow procurement managers to fulfill urgent industrial demands without delays.

For high-quality 321 stainless steel rods and 321 SS round bars with guaranteed performance and timely delivery, reach out to Sachin Steel Center today to request a quote.

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321 Stainless Steel Round Bars / Rods

321 stainless steel round bars (also known as 321 SS rods) are austenitic stainless steel bars stabilized with titanium to prevent carbide precipitation during welding. This makes them highly resistant to intergranular corrosion and suitable for high-temperature environments. They exhibit excellent oxidation resistance, tensile strength, and durability, making them ideal for use in petrochemicals, power generation, chemical processing, pharmaceuticals, and marine equipment.

These rods are available in various shapes, including round, hex, square, flat, and threaded bars, and can be supplied in standard or custom lengths. 321 stainless steel rods maintain mechanical properties even under thermal cycling and offer good weldability, formability, and machinability. Common finishes include bright polished, black, BA, and matt finish.

Their combination of chromium, nickel, and titanium ensures stability under high temperatures, creep resistance, and long service life, making them a reliable choice for industrial applications.

Key Features of 321 ss round bar:

  • High corrosion resistance – resistant to oxidizing and mildly corrosive environments.
  • Excellent high-temperature performance – retains strength and durability up to 870°C.
  • Titanium stabilized – prevents carbide precipitation during welding.
  • Superior mechanical properties – high tensile strength, yield strength, and good impact resistance.
  • Good weldability & formability – easy to fabricate into various shapes.
  • Versatile sizes and shapes – available in round, hex, square, flat, and threaded bars.
  • Various finishes – bright polished, black, BA, and matt finish options.

Different Types of 321 SS Round Bars

Hex Bar

SS 321/321H Hex Bar

Bright Bar

SS 321/321H Bright Bar

Rectangular Bar

SS 321/321H Rectangular Bar

Square Bar

SS 321/321H Square Bar

Polished Bar

SS 321/321H Forged Bar

Flat Bar

SS 321/321H Flat Bar

Request Quote on Types of SS 321/321H Round Bars
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Specifications for 321 SS Round Bars

Material Stainless Steel 321 / 321H
Length 2 meters to 7.5 meters ( 8 feet to 24 feet), or Custom Length as per Requirement
Available Forms Rod, Precision Ground, Blocks, Round, Channel, Triangle, Hollow, Rectangle, Threaded, Profiles, Rings, Round Rod, Half Round, Ingot, Billet, Square, Hex (A/F), Rectangle, Forging etc.
Heat Treatment Annealed, Solution Annealed
Size Tolerances h10 and h11
Size range 12 mm – 46 mm (1/2 inch- 1 ¾ inch)
Crack Test Magnetic Particle Inspection (MPI)
Chamfering Available in 30°, 45° & 60° through fully automatic, both-end chamfering machine
Tolerance H8, H10, H9, H11, H13K9, H12, K10, K12 K11 or as per clients’ requirements
Ultrasonic Test As per API 6A/ISO, ASTM A-388, EN 10308 (class 1 to 4) it is 100% tested thru Digital Ultrasonic Flaw Detector, MIL STD 2154, 10423:2003-PSL 3, SEP 1920:1984
Surface Finish Cold (bright) drawn, smooth turned, hot rolled, centreless ground, peeled, Rough Turned, hot rolled annealed, Bright, slit rolled edge, Polish, Grinding, Centreless Ground & Black

Chemical Composition of 321/321H Stainless Steel Bars

% Cr Ni C Si Mn P S N Ti Fe
321 min:17.0
max:19.0		 min: 9.0
max:12.0		 max:0.08 max:0.75 max:2.0 max:0.045 max:0.03 max:0.10 min:5*(C+N)
max:0.70		 Balance
321H min:17.0
max:19.0		 min: 9.0
max:12.0		 min:0.04
max:0.10		 min:18.0
max:20.0		 max:2.0 max:0.045 max:0.03 max:0.10 min:5*(C+N)
max:0.70		 Balance

Equivalent Material Grades for SS 321 Round Bars

STANDARD WERKSTOFF NR. UNS JIS BS GOST AFNOR EN
SS 321 1.4541 S32100 SUS 321 – 08Ch18N10T – X6CrNiTi18-10

Size Ranges of 321 SS Round Bars/Rods

Flat Bar Size (Inch) Flat bar sizes in mm Thickness (in Inch) Thickness (mm)
7/8 22 2/3 – 5/7 17 & 18
1-3/16 30 3/16 – 4/5 5 to 20
1-3/8 35 3/16 – 3/16 5 to 20
2 50 3/16 – 1-1/4 5 to 32
2-1/4 57 1-1/4 32
2-1/2 63 3/8 – 1-3/16 10 to 30
2-3/4 70 1/4 – 1, & 1-4/7 6 to 25 & 40
3-1/8 80 5/16 – 4/5 8 to 20
4 100 5/16, 3/8, 1/2 8, 10, 12
1-7/9 45 3/16 – 1 5 to 25
1 25 3/16 – 4/5 5 to 20
1-1/4 32 1/4 – 4/5 6 to 20
1-4/7 40 3/16 – 1 5 to 25
1-6/7 47 2/3, 1 & 1-1/4 17,25 & 32
2-1/16 55 3/16 – 1 5 to 25
2-3/8 60 3/16 – 1-3/8 5 to 35
2-5/9 65 3/8 – 1-3/16, & 1-3/8 10 to 30 & 35
3 75 5/16 – 1 8 to 25
3-1/2 90 5/16- 4/5 8 to 20

Mechanical Strength of 321 Stainless Steel Rods

Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
8.0 g/cm3 1454 °C (2650 °F) Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 35 %

Available Dimensions for 321 Stainless Steel Round Bars

Diameter or
Width
(mm)		 Weight per meter Sectional Area Perimeter
– Square
(kg)		 Round
(kg)		 Square
(cm²)		 Round
(cm²)		 Square
(cm)		 Round
(cm)
5.0 0.20 0.15 0.25 0.20 2.0 1.57
5.5 0.24 0.19 0.30 0.24 2.2 1.78
6.0 0.28 0.22 0.36 0.28 2.4 1.88
7.0 0.38 0.30 0.49 0.38 2.8 2.20
8.0 0.50 0.39 0.64 0.50 3.2 2.51
9.0 0.64 0.50 0.81 0.64 3.6 2.83
10 0.73 0.63 1.00 0.79 4.0 3.14
11 0.95 0.75 1.21 0.95 4.4 3.46
12 1.13 0.89 1.44 1.13 4.8 3.77
14 1.54 1.21 1.96 1.54 5.6 4.40
16 2.01 1.58 2.56 2.01 6.4 5.03
18 2.54 2.00 3.24 2.54 7.2 5.65
20 3.14 2.47 4.00 3.14 8.0 6.28
22 3.80 2.98 4.84 3.80 8.8 6.91
25 4.91 3.85 6.25 4.91 10.0 7.85
28 6.15 4.83 7.84 6.16 11.2 8.80
32 8.04 6.31 10.24 8.04 12.8 10.05
36 10.17 7.99 12.96 10.18 14.4 11.31
40 12.56 9.86 16.00 12.57 16.0 12.57
45 15.90 12.49 20.25 15.90 18.0 14.14
50 19.62 15.41 25.00 19.64 20.0 15.71
56 24.62 19.34 31.36 24.63 22.4 17.59
63 31.16 24.47 36.69 31.17 25.2 19.79
71 39.57 31.08 50.41 39.59 28.4 22.31
80 50.24 39.46 64.00 50.27 32.0 25.13

Industry Standards for 321 Stainless Steel Round Bars

ASTM A276 This specification encompasses cold-finished or hot-finished bars, including rounds, squares, and hexagons, and hot-rolled or extruded shapes, such as angles, tees, and channels in the more commonly used types of stainless steels.
ASTM A479 This specification includes cold and hot finished stainless steel bars, including rounds, squares, and hexagons, and hot-rolled or extruded shapes such as angles, tees, and channels.
ASTM A484 This specification includes wrought stainless steel bars, shapes, forgings, and billets or other semi-finished materials, except wire, for forging. The materials are available in four types of conditions.
ASTM A582 This specification includes cold or hot finished bars, which are suitable for machining processes. This specification includes rounds, squares, and hexagons, from common types of stainless free-machining steels.

Weight Chart & Calculation for SS 321 Round Bars

Size Kgs / Foot Kgs / Mtr Size Kgs / Foot Kgs / Mtr Size Kgs / Foot Kgs / Mtr
3mm 0.017 0.055 20mm 0.753 2.470 3″ 10.900 35.762
1/8″ 0.019 0.062 22mm 0.908 2.979 3-1/4″ 12.800 41.996
5/32″ 0.029 0.095 7/8″ 0.926 3.038 3-1/2″ 14.850 48.772
4mm 0.030 0.098 24mm 1.080 3.543 3-3/4″ 17.001 55.780
3/16″ 0.043 0.141 25mm 1.180 3.871 4″ 19.306 63.340
5mm 0.047 0.154 1″ 1.210 3.970 4-1/4″ 21.908 72.249
7/32″ 0.058 0.190 26mm 1.271 4.170 4-1/2″ 24.4487 80.340
6mm 0.068 0.223 27mm 1.368 4.490 4-3/4″ 27.366 90.249
1/4″ 0.076 0.249 1-1/8″ 1.534 5.033 5″ 30.461 99.940
7mm 0.091 0.298 30mm 1.691 5.548 5-1/2″ 36.690 121.000
5/16″ 0.118 0.387 1-1/4″ 1.924 6.349 6″ 43.860 143.900
8mm 0.120 0.398 32mm 1.894 6.314 6-1/2″ 51.093 167.630
9mm 0.152 0.498 1-3/8″ 2.303 7.550 7″ 59.432 196.000
3/8″ 0.170 0.557 35mm 2.390 7.553 7-1/2″ 68.226 225.000
10mm 0.189 0.620 36mm 2.438 7.999 8″ 77.586 254.55
11mm 0.228 0.748 38mm 2.792 8.903 10″ 121.048 397.140
7/16″ 0.232 0.761 1-1/2″ 2.715 8.951
12mm 0.271 0.889 40mm 3.009 9.872
1/2″ 0.303 0.994 1-5/8″ 3.200 10.449
13mm 0.318 1.043 1-3/4″ 3.712 12.179
14mm 0.368 1.207 45mm 3.807 12.555
9/16″ 0.383 1.256 1-7/8″ 4.260 13.977
15mm 0.424 1.391 48mm 4.330 14.205
5/8″ 0.473 1.551 50mm 4.698 15.414
16mm 0.481 1.578 2″ 4.848 15.906
17mm 0.543 1.791 2-1/8″ 5.475 17.963
11/16″ 0.573 1.880 2-1/4″ 6.135 20.128
18mm 0.610 2.001 60mm 6.768 22.205
3/4″ 0.682 2.237 2-3/8″ 6.838 22.435
2-1/2″ 7.576 24.856
2-5/8″ 8.354 27.409
2-3/4″ 9.169 30.083

Physical Characteristics of 321 Stainless Steel Round Bars

Denstiy
lbm/in3		 Coefficient of
Thermal Expansion (min/in)-°F		 Thermal Conductivity BTU/hr-ft-°F Specific Heat BTU/lbm -°F Modules of Elasticity (annealed)2-psi
at 68 °F at 68 – 212°F at 68 – 1832°F at 200°F at 32 – 212°F in tension (E)
0.286 9.2 20.5 9.3 0.12 28 x 106

Applications of 321 Stainless Round Bar

    • Petrochemical Industry
    • Chemical Industry
    • Oil and Gas Industry
    • Pulp & Paper Indusry
    • Power Plant Industry
    • Food Processing Industry
    • Pharmaceuticals Industry
    • Energy Industry
    • Aerospace Industry
Application Industries

Frequently Asked Questions About 321 SS Round Rod

321 stainless steel round rods are widely used in industries that require high-temperature resistance and corrosion protection. Common applications include chemical processing equipment, heat exchangers, exhaust stacks, furnace components, petrochemical plants, oil and gas equipment, aerospace, and power generation units.

321 SS round bars can operate at continuous service temperatures up to 870°C (1,600°F) and intermittent temperatures slightly higher. The addition of titanium in the alloy stabilizes the steel against carbide precipitation during welding, maintaining strength and corrosion resistance even at elevated temperatures.

Yes, 321 stainless steel rods offer excellent weldability and machinability. They can be welded using conventional techniques, including TIG and MIG welding. However, post-weld heat treatment is generally not required due to the titanium stabilization, which reduces the risk of intergranular corrosion. They can also be machined, formed, or cold-worked with standard industrial tools.

 The weight of a 321 stainless steel rod can be calculated using the formula:

Weight (kg) = Diameter² (mm) × Length (m) × 0.00785

Where 0.00785 is the density factor for stainless steel. This helps procurement managers and engineers estimate material requirements efficiently.

This formula assumes the density of SS 310 as 7.85 g/cm³. Using this, you can estimate the weight for custom diameters and lengths.

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