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Stainless steel 304 round bar

Stainless steel 304 round bar Specifications

What are the properties of Stainless Steel 304 Flat Bar, Hex Bar, and Square Bar?

This standard 18-8 chromium-and-nickel steel grade boasts strength, low maintenance, and easy formability. A stainless steel 304 flat bar works in diverse areas like automotive, shipbuilding, defence, fabrication, and heavy earth-moving equipment.

  • This material is suitable for work hardening.
  • A UNS 30400 stainless hex bar can deliver a veritable combination of strength and wear resistance for construction projects.
  • It shows good machinability and weldability. Clients can also choose to weld without fillers.

These bars can take different shapes to address specific buyer needs, for instance, a stainless steel 304 square bar. Square components get specified similarly to round bars, but flat ones also need thickness. Hexagonal shapes offer tight tolerance and weight-bearing abilities.

Stainless steel 304 hex bar supplier in India


Specification of stainless steel 304 round bar

Specifications Size Tolerances
EN 10272, EN 10088-3 Grade 1.4301, AMS 5639, EN58E 3mm - 800mm H12, K10, H10, K11, H11, K12, H13, H9, H8, K9
Production method Length Surface finish
Rolled / forged Long bars: 15-20 random lengths 8K, HL, NO.3, BA, 2B, 1D, NO.4, 2D
American standards Processing services of SS 304 hex bar ASTM A 240 SS 304 flat bar application
ASTM, ASTM JIS GB EN DIN Bending, cutting, welding, decoiling, Petroleum, chemical industry, food industry, pharmaceutical, ship-building industry

We supply ASTM A 240 SS 304 flat bar suitable for highly corrosive conditions

What is the corrosion resistance of Stainless Steel 304 Flat Bar, Hex Bar, and Square Bar?

An ASTM A 240 flat bar is well-known for consistent corrosion resistance to numerous abrasive agents, like mild acids and alkalis. Its annual corrosion rate is approximately 0.05 to 2 mm or around 0.0.55 μm.

However, an ASME SA 240 SS 304 square bar is not immune to pitting, crevice corrosion, and stress corrosion cracking at higher temperatures and chloride environments. As a rule of thumb, an SS 304 hex bar can show good oxidation resistance up to 870°C (or 925°C in continuous service) if the risk of carbide precipitation gets managed.

Types of SS 304 rod


304 Stainless Steel Hexagon Bar

304 Stainless Steel Hexagon Bar

SS 304 bright bar

SS 304 bright bar

Inox 304 Square Bar

Inox 304 Square Bar

304 Stainless Steel Flat Bar

304 Stainless Steel Flat Bar

We offer ASME SA 240 SS 304 square bars with customized thicknesses and sizes

Which standard testing protocols are used for Stainless Steel 304 Flat Bar, Hex Bar, and Square Bar?

The core purpose of testing a DIN 1.4301 ASTM A 240 flat bar is to ensure its fitment to the application. It guarantees safety and optimal performance. So, manufacturers subject these components to spectroscopy, visual inspection, X-ray fluorescence, and ultrasonic examination.

An SS 304 flat bar also undergoes tests for tensile strength, compression, bending, and hardness (Brinell, Rockwell). Finally, the capacity to handle impact, torsion, and stress gets analysed and discussed in the MTC.

Vendors may use varying testing protocols, including NDT, manipulative techniques, and integrated quality control during production.

Chemical composition of SS 304 flat bars


C Mn Si P S Cr Ni
0.08 max
2 max
0.75 Max
0.045 max
0.030 max
18 - 20
8 - 11
We keep bulk stock of DIN 1.4301 ASTM A 240 flat bar at our stockyard, for a free sample, visit us

Mechanical properties of SS 304 hex bar


Grade Density Elongation Tensile strength Melting points Yield strength(0.2% offset)
SS 8.0g/ cm3 35% PSI-75000, MPa-515 1400°C (255°F) PSi-30000, MPa-205
Get online SS 304 flat bar chemical composition and mechanical properties

Equivalent grade of ss 304 square bars


Standard Werkstoff nr. UNS JIS BS GOST AFNOR EN
SS 1.4301 S30400 SUS 304 304S31 08X18H10 Z7CN18-09 X5CrNi18-10

Value added services of stainless steel 304 flat bar


  • → Shearing
  • → Surface machining
  • → Precision grinding
  • → Turn, ground, & polishing
  • → Chemical milling
  • → Production bar cutting
  • → Trepanning
  • → Heat treatment
  • → Custom packing
  • → Rigidizing

Tolerances chart of DIN 1.4301 ASTM A 240 flat bar


Stainless steel 304 flat bar size

Plus

Minus

over 1″- 2″ 0.000 0.006
1/8″- 5/16″ 0.000 0.002
over 2″- 3″ 0.000 0.008
1/2″- 1″ 0.000 0.004
5/16″- 1/2″ 0.000 0.003

Weight chart of UNS 30400 stainless hex bar


Stainless Steel Hex Bar
Hex bar size(mm) Hex bar wt/fit (kgs) Hex bar wt/mtr (kgs)
22 1.03 3.39
16 0.55 1.79
20 0.85 2.80
25 1.33 4.38
28 1.67 5.49
32 2.19 7.17
18 0.69 2.27
38 3.08 10.11
30 1.92 6.30
36 2.77 9.07
40 3.41 11.20
45 4.32 14.18
56 - -
65 - -
50 5.34 17.50
60 - -
70 - -
75 - -
100 - -
90 - -
80 - -

Frequently asked questions


1. What is the thickness of steel 304 flat bar?

→ 2 mm, 2.5 mm, 2.7 mm, and 3 mm

2. What is the hardness of SS 304 Rod?

→ Rockwell B hardness of 70

3. What are the characteristics of 304 stainless steel round bars?

→ Excellent corrosion resistance