SS 321/321H Sheets & Plates



Stainless Steel 321 is a basic austenitic 18/8 steel (Grade 304) stabilised by Titanium (321) addition. SS 321 is used because they are not sensitive to intergranular corrosion after heating within the carbide precipitation range of 425-850°C. Stainless Steel 321 is the grade of choice for applications in the temperature range of up to about 900°C, combining high strength, resistance to scaling and phase stability with resistance to subsequent aqueous corrosion. SS 321H is a modification of SS 321 with a higher carbon content, to provide improved high temperature strength. 321/321H sheets offer good corrosion resistance, heat resistance, low temperature strength and mechanical properties. Metline is one of the largest suppliers of 321 stainless steel sheets and plates in India in wide range of grades and sizes.
Stainless Steel 321 / 321H Sheet / Plate is a metallic plate or sheet made up of a titanium stabilized steel that is a chromium nickel alloy. The austenitic stainless steel gets extra corrosion resistant, especially intergranular corrosion resistant at temperatures ranging from 425 degrees Celsius to 850 degrees Celsius. Roopam Steel is a leading supplier and manufacturer of the sheets in different sizes and standards. The SS 321 Sheet is used in aircraft exhaust parts, bellows, heat exchangers, furnace parts and in expansion applications. The material’s strength and high temperature resistance makes the sheets to be used in high temperature services. There are different specifications and standards such as the ASTM A240 Type 321H Plate. The 310H is a high carbon version that lacks nitrogen in the composition and there is a lower carbon 310S version.


Product Features:

  • Corrosion resistant
  • Accurate dimensions
  • Can sustain high pressure & temperature load
  • Rust proof finish
  • Smooth transition from flange thickness to pipe
  • Ensure excellent stress distribution


Specification

Standard ASTM A240 / ASME SA240
Thickness 1.0mm – 100mm
Width 1000mm-2000mm
Production Hot-Rolled (HR) / Cold-Rolled (CR)


Material & Grade :

Stainless Steel :
Grade: 304, 304L, 304H, 309, 309S, 316, 316L, 316H, 310, 310S, 317, 317L, 321, 347, 904L

Chemical Composition

% Cr Ni C Si Mn P S N Ti Fe
321 min:17.0
max:19.0
min: 9.0
max:12.0
max:0.08 max:0.75 max:2.0 max:0.045 max:0.03 max:0.10 min:5*(C+N)
max:0.70
Balance
321H min:17.0
max:19.0
min: 9.0
max:12.0
min:0.04
max:0.10
min:18.0
max:20.0
max:2.0 max:0.045 max:0.03 max:0.10 min:5*(C+N)
max:0.70
Balance

Mechanical Composition

Grade Tensile Strength
ksi (min.)
Yield Strength 0.2%
Offset ksi (min.)
Elongation -
% in
50 mm (min.)
Hardness
(Brinell) MAX
321/321H 75 30 40 217

Other grades also available

Nickel :
Grade: Nickel 200, Nickel 201
Inconel :
Grade: Inconel 600, Inconel 601, Inconel 625, Inconel 718
Duplex Steel :
Grade: UNS F44, F45, F51, F53, F55, F60, F61
Carbon Steel :
Grade: WPB , WPBW, WPHY 42, WPHY 46, WPHY 52, WPH 60, WPHY 65 & WPHY 70
Incoloy :
Grade: Incoloy 800, Incoloy 800H, Incoloy INCOLOY 800HT,Incoloy 825
Hastalloy :
Grade: Hastalloy B2, Hastalloy B3, Hastalloy C22, Hastalloy C276, Hastalloy X
Titanium :
Grade: Gr1, Gr2, Gr3, Gr5, Gr7, Gr11
Monel :
Grade: Monel 400, Monel K500, Monel R-405