321/321H Stainless Steel Sheet/Plate

1. Grade: 321/321H

2. Width: 1000, 1219, 1250, 1500, 1524, 1800, 2000mm

3. Length: 2000, 2438, 2500, 3000, 6000mm 

4. Surface: 2B, No.1, No.3, NO.4, HL

5. Standard: ASTM A480, JIS G4304, GB/T 24511, GB/T 4237

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321/321H Stainless Steel Sheet/Plate:

Alloy 321 (UNS S32100) is a titanium stabilized austenitic stainless steel with good general corrosion resistance. It has excellent resistance to intergranular corrosion after exposure to temperatures in the chromium carbide precipitation range of 800 – 1500°F (427 – 816°C). The alloy resists oxidation to 1500°F (816°C) and has higher creep and stress rupture properties than alloys 304 and 304L. It also possesses good low temperature toughness.

Video Description:

Type: 321/321H Stainless Steel Sheet/Plate
Thickness: 0.3-80mm
Width: 1000, 1219, 1250, 1500, 1524, 1800, 2000mm
Length: 2000, 2438, 2500, 3000, 6000mm 
Surface: BA,2B,NO.1,NO.4,4K,HL,8K
Application: 321/321H Stainless Steel Sheet/Plate for

  1. Aerospace – piston engine manifolds
  2.  Chemical Processing
  3. Expansion Joints
  4. Food Processing – equipment and storage
  5. Petroleum Refining – polythionic acid service
  6. Waste Treatment – thermal oxidizers
  7. Pharmaceutical Production
Certification: ISO, SGS,BV
Technique: Cold Rolled /Hot Rolled Coil
Edge: Mill Edge Slit Edge
Supply Ability: 5000 Ton/Tons per Month
PVC Film: Could offer coating standard / laser PVC film for protecting
Packaging & Delivery

Packaging Details: In bundle,plastic bags,thin film,wooden pallet,standard seaworthy export packing or as customer demands

20ft GP:5898mm(Length)x2352mm(Width)x2393mm(High)   24-26CBM

40ft GP:12032mm(Length)x2352mm(Width)x2393mm(High)   54CBM

40ft HC:12032mm(Length)x2352mm(Width)x2698mm(High)    68CBM


321H Stainless Steel Sheet/Plate:

Alloy 321 cannot be hardened by heat treatment, only by cold working.
It can be easily welded and processed by standard shop fabrication practices.Alloy 321H (UNS S 32109) is the higher carbon (0.04 – 0.10) version of the alloy.
It was developed for enhanced creep resistance and for higher strength at temperatures above 1000oF (537°C). In most instances, the carbon content of the plate enables dual certification.


  1. ASTM……..A 240
  2. ASME……..SA 240
  3. AMS………..5510

Chemical Properties:

Weight % (all values are maximum unless a range is otherwise indicated)

Element 321 321H
Chromium 17.00 min.-19.00 max 17.00 min.-19.00 max.
Nickel 9.00 min.-12.00 max 9.00 min.-12.00 max.
Carbon 0.08 0.04 min.-0.14 max.
Manganese 2.00  2.00
Phosphorus 0.045 0.045
Sulfur 0.03  0.03
Silicon 0.75 0.75
Titanium 5 x (C + N) min.-0.70 max. 4 x (C + N) min.-0.70 max.
Nitrogen 0.10  0.10
Iron Balance  Balance

Physical Properties:

lb m /in3
Coefficient of
Thermal Expansion (min/in)-°F
hermal Conductivity BTU/hr-ft-°F Specific Heat BTU/lb m -°F Modules of Elasticity (annealed) 2 -psi
at 68 °F at 68 – 212°F

at 68 – 1832°F

at 200°F at 32 – 212°F in tension (E)
0.286 9.2


9.3 0.12 28 x 10 6

Corrosion Resistance

  • exhibits good general corrosion resistance that is comparable to 304.
  • developed for use in the chromium carbide precipitation range of 1800 – 1500°F (427 – 816°C) .
  • can be used in most diluted organic acids at moderate temperatures .
  • can be used in pure phosphoric acid at lower temperatures.
  • can be used in up to 10% diluted solutions at elevated temperatures.
  • resists polythionic acid stress corrosion cracking in hydrocarbon service.
  • utilized in chloride or fluoride free caustic solutions at moderate temperatures.
  • does not perform well in chloride solutions, even in small concentrations, or in sulfuric acid service.

Value-added Service

Every industry has its unique set of stainless steel coil specifications and needs. We offer many Value Added Services to meet your needs from cut-to-length to hard-to-find materials and special requirements. With over 13 years in the business, our team is professional at finding out solutions to fit your needs.


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Stainless Steel Coil/Sheet Beveling We can cut and bevel the edges of stainless steel coil/sheet to prepare forwelding or other processing.
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Stainless SteelCoil/Sheet Polishing Our stainless steel steel coil/sheetcan be polished to a #4 polish, #6 polish,#7polish, or a #8 mirror finish. It can also be polished on one side or two sides.
Stainless SteelCoil/Sheet Perforating Our perforated stainless steel steel coil/sheetcomes in a selection of holeshapes, pattern sizes, gauges and grades. It has endless applications such asenclosures,partitions, sign panels, guards, screens, and more.
Stainless SteelCoil/Sheet Laser Cutting Our technologically advanced laser machines provide us with an efficient, high speed and cost effective form of profiling steel coil/sheetwhich ensures a superior clean cut and oxide free finish.
Stainless SteelCoil/Sheet Water Jet Cutting We offer stainless steel steel coil/sheetdynamic Waterjet cutting in order to process complex part geometry.
Stainless SteelCoil/Sheet Embossing Our stainless steel embossed patterns including basket embossed pattern,diamond pattern or square pattern.
Stainless Steel Coil/Sheetdecorating We offer various decorative stainless steel steel coil/sheet, such as stainless steel mirror steel coil/sheet, stainless steel hairline steel coil/sheet,color coated stainless steel coil/sheet, etched stainless steel steel coil/sheet, vibration finish stainless steel steel coil/sheet, bead blast finish stainless steel steel coil/sheet, stain brush finish stainless steel steel coil/sheet, and more.
Stainless SteelCoil/Sheet Heatreating & Annealing We can heatreat 410 and 17-4PH stainless steel plate to change mechanical properties. In some cases, secondary annealing 300 series might be required depending on the application.


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