STAINLESS STEEL TUBING 304

ss tubing 304 b

STAINLESS STEEL TUBING 304 manufacturer
304/304L Stainless Steel tubing’s Range, Stainless Steel 304/304L tubing Specifications: ASTM A/ASME SA213/A249/A269/A312/A358 CL. I to V ASTM A789/A790, Stainless Steel 304/304L tubing sizes (Seamless): 1/2" NB - 16" NB, Stainless Steel Pipe 304/304L tubing sizes (ERW): 1/2" NB - 24" NB.

Stainless Steel Grade 304/304L stainless steel is the most standard used alloy for numerous stainless steel applications from Industrial to Daily use. Essentially, Grade 304 is an austenitic chromium alloy which is also known as an "18/8" stainless as the make-up of the steel is 18% chromium and 8% nickel.

The chromium content promotes the material's considerable resistance to the effects of corrosion and oxidation. The stainless steel alloy resists most oxidizing acids and will withstand ordinary rusting though this does not mean that the steel will not tarnish over time. The steel needs to be cold worked to generate higher tensile strength. For stainless steel sections which are welded heavily, post-weld annealing may be necessary to provide maximum corrosive resistance.

Applications of Grade 304/304L Stainless Steel :-

The steel is common throughout industry particularly in food processing as the material is not susceptible to corrosion from acids found in common foodstuffs. As a consequence, such steel is ideal for items such as sinks, work surfaces, preparation areas and refrigerators. It is also a perfect material for use in the pharmaceutical industry for environments such as clean rooms.

Grade 304 can also be found in heat exchangers, chemical containers, pipelines and throughout the brewing industry. It can be used as a fabricated material where high temperature petroleum gases or steam production gases are stored such as pressure vessels. It can even be found extensively in the construction industry where the material is used for cosmetic purposes such as building fascia’s.

Table 1. Composition ranges for 304 grade stainless steel

Grade 304 304L 304H
  C Mn Si P S Cr Mo Ni N
min. - - - - - 18.0 - 8.0 -
max. 0.08 2.0 0.75 0.045 0.030 20.0 10.5 0.10
min. - - - - - 18.0 - 8.0 -
max. 0.030 2.0 0.75 0.045 0.030 20.0 12.0 0.10
min. 0.04 - - - - 18.0 - 8.0 -
max. 0.10 2.0 0.75 0.045 0.030 20.0 10.5

304 Stainless Steel Pipe and Tubes Mechanical Properties
Typical mechanical properties for grade 304 stainless steels are given in table 2.

Table 2. Mechanical properties of 304 grade stainless steel


Grade Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min Hardness
Rockwell B (HR B) max Brinell (HB) max
304 515 205 40 92 201
304L 485 170 40 92 201
304H 515 205 40 92 201
304H also has a requirement for a grain size of ASTM No 7 or coarser.


304 Stainless Steel Pipe and Tubes Physical Properties
Typical physical properties for annealed grade 304 stainless steels are given in table 3.

Table 3. Physical properties of 304 grade stainless steel in the annealed condition

Grade 304/L/H
Density (kg/m3) Elastic Modulus (GPa) Mean Coefficient of Thermal Expansion (m/m/0C) Thermal Conductivity (W/m.K) Specific Heat 0-1000C (J/kg.K) Electrical Resistivity (n.m)
0-1000C 0-3150C 0-5380C at 1000C at 5000C
8000 193 17.2 17.8 18.4 16.2 21.5 500 720

304 Stainless Steel Pipe and Tubes Grade Specification Comparison
Approximate grade comparisons for 304 stainless steels are given in table 4.

Table 4. Grade specifications for 304 grade stainless steel

Grade UNS No Old British Euronorm Swedish SS Japanese JIS
BS En No Name
304 S30400 304S31 58E 1.4301 X5CrNi18-10 2332 SUS 304
304L S30403 304S11 - 1.4306 X2CrNi19-11 2352 SUS 304L
304H S30409 304S51 - 1.4948 X6CrNi18-11 - -
These comparisons are approximate only. The list is intended as a comparison of functionally similar materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted.


Stainless Steel Grade 304/304L tubing Stock at Chemtech Alloys stainless Steel India.

Stainless Steel Grade 304/304L Seamless tubing 1/2" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS

Stainless Steel Grade 304/304L Seamless tubing 3/4" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS

Stainless Steel Grade 304/304L Seamless tubing 1" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS

Stainless Steel Grade 304/304L Seamless tubing 1-1/4" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS

Stainless Steel Grade 304/304L Seamless tubing 1-1/2" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS

Stainless Steel Grade 304/304L Seamless tubing 2" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS

Stainless Steel Grade 304/304L Seamless tubing 2-1/2" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS

Stainless Steel Grade 304/304L Seamless tubing 3" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS

Stainless Steel Grade 304/304L Seamless tubing 3-1/2" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS

Stainless Steel Grade 304/304L Seamless tubing 4" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS

Stainless Steel Grade 304/304L Seamless tubing 5" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS

Stainless Steel Grade 304/304L Seamless tubing 6" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS

Stainless Steel Grade 304/304L Seamless tubing 8" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS

Stainless Steel Grade 304/304L Seamless tubing 10" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS

Stainless Steel Grade 304/304L Seamless tubing 12" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS

Stainless Steel Grade 304/304L Seamless tubing 14" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS

Stainless Steel Grade 304/304L Seamless tubing 16" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS

Stainless Steel Grade 304/304L Seamless tubing 18" NB in Thickness Schedule 10, Schedule 40, Schedule 80, Schedule 160, Schedule XXS