Stainless steel 304, 304L, 304H for cookware, cutlery, kitchen,
laundry, appliance, heat exchanger, venting etc
Stainless steel 304, 304L, 304H for cookware, cutlery, kitchen and
laundry equipment, appliances, heat exchangers, venting products
UNS S30400, SUS 304, W.Nr. 1.4301, X5CrNi18-10
UNS S30403, SUS304L, W.Nr. 1.4306, X2CrNi19-11
UNS S30409, W.Nr.1.4948, X6CrNi18-11
Product forms include seamless pipe and tube, cold rolled precision
strip, heavy plate, round bar, flat bar, forging stock, hexagon,
cold drawn section, fine wire, equal leg angle and finished parts,
The products are provided in solution annealing condition.
Grade 304 is the standard "18/8" stainless, it is the most
versatile and most widely used stainless steel, available in a
wider range of products, forms and finishes than any other. It has
excellent forming and welding characteristics. The balanced
austenitic structure of Grade 304 enables it to be severely deep
drawn without intermediate annealing, which has made this grade
dominant in the manufacture of drawn stainless parts such as sinks,
hollow-ware and saucepans. For these applications it is common to
use special "304DDQ" (Deep Drawing Quality) variants. Grade 304 is
readily brake or roll formed into a variety of components for
applications in the industrial, architectural, and transportation
fields. Grade 304 also has outstanding welding characteristics.
Post-weld annealing is not required when welding thin sections.
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).
Grade 304H with its higher carbon content finds application at
elevated temperatures. The austenitic structure also gives these
grades excellent toughness, even down to cryogenic temperatures.
Typical applications include
Food processing equipment, particularly in beer brewing, milk
processing & wine making.
Kitchen benches, sinks, troughs, equipment and appliances
Architectural panelling, railings & trim
Chemical containers, including for transport
Woven or welded screens for mining, quarrying & water
CHEMICAL COMPOSITION (wt%):
Physical properties of 304 series stainless steel in the annealed
|Grade||Density (kg/m3)||Elastic Modulus (GPa)||Mean Coefficient of Thermal Expansion (μm/m/°C)||Thermal Conductivity (W/m.K)||Specific Heat 0-100 °C (J/kg.K)||Electrical Resistivity (nΩ.m)|
|0-100 °C||0-315 °C||0-538 °C||at 100 °C||at 500 °C|
Mechanical properties of 304 series stainless steel
|Grade||Tensile Strength (MPa) min||Yield Strength 0.2% Proof (MPa) min||Elongation (% in 50 mm) min||Hardness|
|Rockwell B (HR B) max||Brinell (HB) max|
Excellent in a wide range of atmospheric environments and many
corrosive media. Subject to pitting and crevice corrosion in warm
chloride environments, and to stress corrosion cracking above about
60 °C. Considered resistant to potable water with up to about 200
mg/L chlorides at ambient temperatures, reducing to about 150 mg/L
at 60 °C.
Good oxidation resistance in intermittent service to 870℃ and in
continuous service to 925℃. Continuous use of 304 in the 425-860℃
range is not recommended if subsequent aqueous corrosion resistance
is important. Grade 304L is more resistant to carbide precipitation
and can be heated into the above temperature range.
Grade 304H has higher strength at elevated temperatures so is often
used for structural and pressure-containing applications at
temperatures above about 500℃ and up to about 800℃. 304H will
become sensitised in the temperature range of 425-860℃; this is not
a problem for high temperature applications, but will result in
reduced aqueous corrosion resistance.
Solution Treatment (annealing) - Heat to 1010-1120℃ and cool
rapidly. These grades cannot be hardened by thermal treatment.
Excellent weldability by all standard fusion methods, both with and
without filler metals. AS 1554.6 pre-qualifies welding of 304 with
Grade 308 and 304L with 308L rods or electrodes (and with their
high silicon equivalents). Heavy welded sections in Grade 304 may
require post-weld annealing for maximum corrosion resistance. This
is not required for Grade 304L. Grade 321 may also be used as an
alternative to 304 if heavy section welding is required and
post-weld heat treatment is not possible.
|Minimum Order Quantity||1000 kilogram|
|Packaging Details||Water prevent, seaworthy transport, non-fumigation wooden box|
|Mark||As per order|
|Delivery Time||60-90 days|
|Payment Terms||T/T, L/C at sight, D/P|
|Supply Ability||300 metric tons per month|