321 / 1.4541 Stainless Steel Sheet

Standard Stock Sizes: 1ft x 4ft, 2ft x 2ft, 2ft x 4ft, 4ft x 4ft, 4ft x 8ft, 4ft x 10ft or Cut to Size.

Thickness: 0.25mm-100mm

Width: 1000mm, 1219mm, 1500mm, 1800mm, 2000mm, 2500mm, 3000mm, 3500mm, etc

Length: 2000mm, 2440mm, 3000mm, 5800mm, 6000mm, etc

Surface: 2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, checkered, embossed, hair line, sand blast, Brush, etching, etc
Finish: Hot rolled plate (HR), Cold rolled sheet (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated)

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321 / 1.4541 Stainless Steel Sheet

 

China * GB GB24511 06Cr18Ni11Ti
Japan JIS SUS321
United States of America ASTM 321
UNS S32100
South Korea KS STS321
European Union BSEN 1.4541
India IS 04Cr18Ni10Ti20
Australia AS 321
Taiwan, China CNS 321
Germany DIN X6CrNiTi18-10
United Kingdom BS970 BS1449 321S12
Belgium BS970Part1

 

General Properties

Alloy 321 (UNS S32100) is titanium stabilized austenitic stainless steel plate 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.

Alloy 321H (UNS S 32109) stainless steel plate 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.

Alloy 321 stainless steel plate cannot be hardened by heat treatment, only by cold working. It can be easily welded and processed by standard shop fabrication practices.

Corrosion Resistance

Alloy 321 stainless steel plate exhibits good general corrosion resistance that is comparable to 304. It was developed for use in the chromium carbide precipitation range of 1800 – 1500°F (427 – 816°C) where un-stabilized alloys such as 304 are subject to intergranular attack.

The alloy can be used in most diluted organic acids at moderate temperatures and in pure phosphoric acid at lower temperatures and up to 10% diluted solutions at elevated temperatures. Alloy 321 resists polythionic acid stress corrosion cracking in hydrocarbon service. It can also be utilized in chloride or fluoride free caustic solutions at moderate temperatures.

Alloy 321 stainless steel plate does not perform well in chloride solutions, even in small concentrations, or in sulfuric acid service.

 

Chemical Analysis

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

Density

0.286 lbs/in3
7.920 g/cm3

Specific Heat

0.12 BTU/lb-°F (32 – 212°F)
444 J/kg-°K (0 – 100°C)

Modulus of Elasticity

28.0 x 106 psi
193 GPa

Thermal Conductivity 200°F (100°C)

9.3 BTU/hr/ft2/ft/°F
16.0 W/m-°K

Melting Range

2550 – 2635°F
1398 – 1446°C

Electrical Resistivity

72 Microhm-cm at 20°F

Mean Coefficient of Thermal Expansion

Temperature Range
°F °C in/in °F cm/cm °C
68-212 20-100 9.2 x 10-6 16.0 x 10-6
68-1112 20-600 10.5 x 10-6 18.9 x 10-6
68-1832 20-1000 11.4 x 10-6 20.5 x 10-6

 

Mechanical Properties

Typical Values at 68°F (20°C)

Yield Strength
0.2% Offset
Ultimate Tensile
Strength
Elongation
in 2 in.
Hardness
psi (min.) (MPa) psi (min.) (MPa) % (min.) (max.)
30,000 205 75,000 515 40 217 Brinell

 

Fabrication Data

Alloy 321 stainless steel plate can be easily welded and processed by standard shop fabrication practices.

Cold Forming

The alloy is quite ductile and forms easily.

Hot Forming

The high sulfur content of Alloy 303 also has a detrimental impact on hot workability. If hot forming is required, once again, 304 should be considered as an alternate selection.

Machining

The cold work hardening rate of 321 stainless steel plate makes it less machinable than 410 stainless steel, but similar to 304. The table below provides relevant machining data.

Operation Tool Lubrication CONDITIONS
Depth-mm Depth-in Feed-mm/t Feed-in/t Speed-m/min Speed-ft/min
Turning High Speed Steel Cutting Oil 6 .23 0.5 .019 12-16 39-52
Turning High Speed Steel Cutting Oil 3 .11 0.4 .016 18-23 59-75
Turning High Speed Steel Cutting Oil 1 .04 0.2 .008 23-28 75-92
Turning Carbide Dry or Cutting Oil 6 .23 0.5 .019 67-76 220-249
Turning Carbide Dry or Cutting Oil 3 .11 0.4 .016 81-90 226-295
Turning Carbide Dry or Cutting Oil 1 .04 0.2 .008 99-108 325-354
Depth of cut-mm Depth of cut-in Feed-mm/t Feed-in/t Speed-m/min Speed-ft/min
Cutting High Speed Steel Cutting Oil 1.5 .06 0.03-0.05 .0012-.0020 16-21 52-69
Cutting High Speed Steel Cutting Oil 3 .11 0.04-0.06 .0016-.0024 17-22 56-72
Cutting High Speed Steel Cutting Oil 6 .23 0.05-0.07 .0020-.0027 18-23 59-75
Drill ø mm Drill ø in Feed-mm/t Feed-in/t Speed-m/min Speed-ft/min
Drilling High Speed Steel Cutting Oil 1.5 .06 0.02-0.03 .0007-.0012 9-13 29-42
Drilling High Speed Steel Cutting Oil 3 .11 0.05-0.06 .0020-.0024 11-15 36-49
Drilling High Speed Steel Cutting Oil 6 .23 0.08-0.09 .0031-.0035 11-15 36-49
Drilling High Speed Steel Cutting Oil 12 .48 0.09-0.10 .0035-.0039 11-15 36-49
Feed-mm/t Feed-in/t Speed-m/min Speed-ft/min
Milling Profiling High Speed Steel Cutting Oil 0.05-0.10 .002-.004 11-21 36-69

Welding

Alloy 321 stainless steel plate can be readily welded by most standard processes. A post weld heat treatment is not necessary.

 

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