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Stainless Steel 303 Round Bar

Stainless Steel 303 Round Bar

What is a Stainless Steel 303 Hex Bar / Square Bar?

This corrosion-resistant material uses 18-20% chromium and up to 10.5% nickel. A stainless steel 303 hex bar is sturdy and versatile. Manufacturers can produce these austenitic products in customer-specified sizes, although 1/8 to 12 inches (diameter) is standard.

Notably, while a UNS S30300 square bar can withstand mild corrosive attacks, it is unsuitable for marine applications.

These products can undergo solution treatment or annealing. An SS 303 hexagonal bar is available in various surface finishes, like turned, polished, and cold-drawn.


Trusted Manufacturer of UNS S30300 Hex Bar in India, View Specification

Stainless Steel 303 Round Bar Specification


ASTM A276 Type 303 Rod Delivery Schedules


Country Name Bolivia Colombia Brazil Chile Argentina
Delivery Time 12 weeks

SUS 303 Bar Price List


Size US Price AED Price
0.125"; SS 303 Annealed Cold Finish Bar $2.50 AED 9.17
0.3125"; 303 Annealed Cold Finish Rounds $3.67 AED 13.48
0.375"; SS 1.4305 Cold Finish Rod $5.23 AED 19.22
0.4375"; A276 tp303 Annealed Bar $7.15 AED 26.27
0.09375"; SUS 303 Cold Finish Rod $7.19 AED 26.37
0.5"; Stainless Steel 303 Cold Drawn Bar $8.78 AED 32.26
1/4";- 12"; A276 303 Bar $10.99 AED 40.34
0.5625"; 303 SS Annealed Round Bar $12.10 AED 44.41
0.625"; A276 Gr 303 Annealed Cold Finish Rounds $14.20 AED 52.18

Stockist of SS 303 Rod and Flat Bar in Custom-Cut to Length, Check Size Chart

Sizes of SS 303 Square Bar


15/16" 1 1/6" 1 3/16" 1 5/16" 1 1/8" 1 7 16" 1 1/4" 1 3/8"
2" 2/12" 3" 4" 2 3/4"   3 1/2"  
1 1/2" 1 9/16" 1 1/16" 1 13/16" 1 5/8" 1 15/16" 1 3/4" 1 7/8"
3/4" 7/16" 5/8" 3/4" 1/2" 7/8" 11/16" 13/16"

What are the characteristics of a Stainless Steel 303 hex bar?

A property that sets apart a stainless steel 303 square bar is brilliant machinability. The presence of sulphur makes this material easy to form, grind, and mould.

  • These components have good mechanical strength, with a tensile rating of 500 to 750 MPa
  • These bars handle temperatures up to 760°C (intermittent) and 870°C (continuous). However, we don’t recommend such usage due to the risk of carbide precipitation over 425°C. It can also experience pitting and crevice corrosion at high temperatures in chloride-rich environments.
  • Not cold workable or hardenable by heat treatment
  • The Brinell hardness stands at 230 HB.

While sulphur benefits UNS S30300 303 hex bars in the ease of machining, it adversely impacts toughness, corrosion resistance, and weldability. Consequently, Werkstoff Nr 1.4305 hexagonal bars have lower resilience than 304 or 316 grades.

Types of A276 tp 303 Bar


Stainless Steel 303 hexagon bar

Stainless Steel 303 hexagon bar

SS 303 square bar

SS 303 square bar

SS 303 hex bar

SS 303 hex bar

SS 303 rectangular bars

SS 303 rectangular bars

Find ASTM A276 Type 303 Square Bar in Cold-Drawn, Smooth / Rough Turned, and Polished Finish, View Weight Chart

Stainless Steel 303 Hex Bar Weight Chart


Stainless steel 303 hex bar
Size(mm) 16 18 20 22 25 28 30 32
wt/mtr (kg) 1.79 2.27 2.80 3.39 4.38 5.49 6.30 7.17
wt/ fit (kg) 0.55 0.69 0.85 1.03 1.33 1.67 1.92 2.19
Size(mm) 36 38 40 45 50 28 56 60
wt/mtr (kg) 9.07 10.11 11.20 14.18 17.50 5.49 - -
wt/ fit (kg) 2.77 3.08 3.41 4.32 1.33 5.34 - -

What are the common applications for a Stainless Steel 303 hex bar?

DIN 1.4305 hexagon bars operate in core industries like machinery, aerospace, chemical processing, and architecture. They also work in food and beverages and capably handle cryogenic roles due to dependable temperature tolerance.

The essential uses of an ASTM A276 Type 303 SS square bar pertain to applications demanding high machinability, like automated machining, shafts, aircraft components, valves, and fasteners like bolts.

Other industries using an ASME SA479 grade 303 hex bar include waste disposal and air pollution control.

Check SUS 303 Bright Bar Tolerance Chart and Properties Before Buying The Material

Tolerance of UNS S30300 303 Rounds


Tolerance Size
  0/-.111mm > 10 - ≤ 18mm
  0/-.090mm > 6 - ≤ 10mm
  0/-.130mm > 18 - ≤ 30mm
  0/-.190mm > 50 - ≤ 80mm
  0/-.075mm > 3 - ≤ 6mm
  0/-.160mm > 30 - ≤ 50mm

A276 Type 303 Annealed Bar Mechanical Properties


Grade Density Melting points Tensile strength Yield strength(0.2% offset) Elongation
SS 8.0g/ cm3 1400°C (255°F) PSI-75000, MPa-515 PSi-30000, MPa-205 35%

SS 303 Forged Bar Equivalent Grade


Standard Werkstoff nr. UNS JIS
German North America Japan
SS 303 Rod 1.4305 S30300 SUS 303
Get WNR 1.4305 Rectangular Bar Up to 6 Meter or Custom Length as per NACE MRO175 Certification, Check Chemical Composition

WNR 1.4305 Cold Drawn Bar Chemical Composition




Characteristics of UNS S30300 Square Bar


  • Good cold working of stainless steel hex bars
  • Good heat resistance
  • Excellent SS hex rod corrosion resistance
  • Fair hex rod hot working
  • Poor heat treatment of hex bars
  • Very good hex bars weldability
  • Good machinability