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Stainless Steel 321 Sheets Plates
Stainless Steel Sheets Plates
Stainless Steel 321H Sheets Plates
Stainless Steel 321/321H Sheets Plates

Stainless Steel 321/321H Sheets Plates

SS 321 Sheets continues to be employed for prolonged service in the 800 Degree F to 1500 Degree F (427 Degree C to 816 Degree C) temperature range. Slightly tougher than other alloys, SS 321 Plates will produce the same tough stringy chips. A preheating is not necessary for SS 321 Coils, where a heat treatment after welding is normally not usual. 321 Stainless Steel Sheets has good creep strength up to 1500 Degree F, along with good resistance to inter-granular corrosion in the as welded condition.
Product information
Alloy 321 (UNS S32100) is stabilized stainless steel plate which offers as its main advantage an excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range from 800 to 1500°F (427 to 816°C). Alloy 321 stainless steel plate is stabilized against chromium carbide formation by the addition of titanium.
Alloy 321 stainless steel plate is also advantageous for high temperature service because of its good mechanical properties. Alloy 321 stainless steel plate offers higher creep and stress rupture properties than Alloy 304 and, particularly, Alloy 304L, which might also be considered for exposures where sensitization and intergranular corrosion are concerns.
Range of Stainless Steel Sheet
Material Size Thickness Specification
Stainless Steel Sheet 1000 mm x 2000 mm,
1220 mm x 2440 mm (4′ x 8′),
1250 mm x 2500 mm,
1500 mm x 3000 To 6000 mm,
2000 mm x 4000 To 6000 mm
0.3 mm To 120 mm A-240

Technical data
Grade UNS No Old British Euronorm Swedish SS Japanese JIS
BS En No Name
321 S32100 321S31 58B,  58C 1.4541 X6CrNiTi18-10 2337 SUS 321
321H S32109 321S51 1.4878 X6CrNiTi18-10 SUS 321H

Type 321 Stainless Steel is covered by the following specifications:AMS 5510, ASTM A240.

Chemical Composition: ASTM A240

Element Type 321
Carbon 0.08 max.
Manganese 2.00 max.
Sulfur 0.030 max.
Phosphorus 0.045 max.
Silicon 0.75 max.
Chromium 17.00 – 19.00
Nickel 9.00 – 12.00
Titanium 5x(C+N) min. – 0.70 max.
Nitrogen 0.10 max.

Mechanical Properties:

Type Yield Strength 0.2% offset (KSI) Tensile Strength (KSI) % Elongation (2" Gauge length) Hardness Rockwell
321 30 min. 75 min. 40 min. HRB 95 max.

Type 321 can be readily formed and drawn, however, higher pressures are required and more springback is encountered than for carbon steel and ferritic stainless steels. Like other austenitic stainless steels,Type 321 work hardens quickly and may require annealing after severe forming.The presence of certain alloying elements can make Type 321 more difficult to form than other austenitic grades such as 301, 304 and 305.

Heat Treatment
Type 321 is non-hardenable by heat treatment.Annealing: Heat to 1750 – 2050 °F (954 – 1121°C), then water quench or air cool.

The austenitic class of stainless steels is generally considered to be weldable by the common fusion and resistance techniques. Special consideration is required to avoid weld ”hot cracking” by assuring formation of ferrite in the weld deposit. This particular alloy is generally considered to have comparable weldability to Types 304 and 304L. A major difference is the titanium addition that reduces or prevents carbide precipitation during welding. When a weld filler is needed, either AWS E/ER 347 or E/ER 321 is most often specified.Type 321 is well known in reference literature and more information can be obtained in this way.

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