UNS Number S30400/S30403

Stainless Steel 304 is a T 300 Series Stainless Steel austenitic. It has a minimum of 18% chromium and 8% nickel, combined with a maximum of 0.08% carbon. It is defined as a Chromium-Nickel austenitic alloy.
Grade 304 is the standard "18/8" stainless that you will probably see in your pans and cookery tools.

Grade 304L, the low carbon version of 304, does not require post-weld annealing and so is extensively used in heavy gauge components (over about 6mm).

Available Forms of Stainless Steel 304/304L at Rooplaxmi Steels:

•           Sheet
•           Plate
•           Bar
•           Pipe & Tube (welded & seamless)
•           Fittings
•           Wire

Characteristics of Stainless Steel 304/304L:

•           Corrosion/ oxidation resistance thanks to the chromium content
•           Deep drawing quality
•           Excellent toughness, even down to cryonegic temperatures which are defined as very low temperatures
•           Low temperature properties responding well to hardening by cold working
•           Ease of cleaning, ease of fabrication, beauty of appearance

 

Stainless Steel 304 Chemical Composition, %:

C	Mn	Si	P	S	Cr	Ni	N
0.08 max	2.0 max	0.75 max	0.045 max	0.030 max	18.0-20.0	8.0-10.5	0.10

 

Fe

Balance

Stainless Steel 304L Chemical Composition, %:

C	Mn	Si	P	S	Cr	Ni	N
0.03 max	2.0 max	0.75 max	0.045 max	0.030 max	18.0-20.0	8.0-12.0	0.10

 

Fe

Balance

 

Application of Stainless Steel 304/304L:

•           Food processing equipment, particularly in beer brewing, milk processing & wine making.
•           Domestic tools industry
•           Architectural panelling, railings & trim
•           Chemical containers, including for transport
•           Heat Exchangers
•           Woven or welded screens for mining, quarrying & water filtration
•           Dyeing industry
•           Marine environment
•           Nuts, bolts, screws, and other fasteners.

 

Mechanical Properties of Stainless Steel 304/304L:
At Room Temperature

 

	Stainless Steel 304	Stainless Steel 304L
Tensile Strength	515 Mpa min	485 Mpa min
Yield	(0.2 % offset) 205 Mpa min	(0.2 % offset) 170 Mpa min
Elongation (in 50mm)	40 % min	40 % min