ASTM A240 321 Sheet,ASTM A240 321 Plate,ASTM A240 SS321 stainless steel plate
ASTM A240 321 plate is an excellent choice for applications where temperature approximately 900° C required.
ASTM A240 321 Plate,Stainless Steel 321 is the stabilized version of Stainless Steel 304. The 18/8 blend of chromium and nickel is tempered with titanium to give type 321 protection from intergranular corrosion that can occur after heat treatment. It is protected from temperatures ranging from 800 to 1500° F. The metal displays high strength and resistance to various forms of corrosions, including that from aqueous environments. Type 321 finds application in heavy welding components, along with dynamic environments that are subject to changes.
However, the addition of titanium limits the application of 321 in terms of working. The metal is not recommended for certain welding techniques as it is not consumable. Beyond this, stainless steel 321 has excellent forming characteristics, does not require annealing after being welded, and displays toughness in a range of temperatures. The metal shows strength even when exposed to cryogenic temperatures. Additionally, it is often chosen over Type 304 for its increased resistance to creep and rupture. Both metals may be susceptible to stress corrosion cracking.
Stainless Steel 321H is the higher-carbon modification of stainless steel 321. In addition, 321H is stabilized by an addition of niobium to resist intergranular corrosion. It is also able to withstand higher temperatures than type 321, due to its elevated carbon levels. While 321H displays the same welding and forming characteristics of type 321, the metal cannot be hardened by heat treatment. It is utilized in situations where type 321 cannot withstand the high temperatures, typically those exceeding 1000° F. Type 321H displays better resistance against creep than both 321 and 304 stainless steels.
321H also shows resistance against acid corrosion in a variety of environments. Lower temperatures provide better resistance, but the metal is able to withstand up to a 10% acid solution, that has been diluted, at elevated temperatures. However, the metal shows very little resistance against chlorine or sulfuric solutions at any given temperature.
Given their similar composition and characteristics, it is possible for stainless steels 321 and 321H to become dually certified.
Types 321 (S32100) and 347 (S34700) are stabilized stainless steels which offer as their 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). Type 321 is stabilized against chromium carbide formation by the addition of titanium. Type 347 is stabilized by the addition of columbium and tantalum. While types 321 and 347 continue to be employed for prolonged
service in the 800 the 1500°F (427 to 816°C) temperature range, Type 304L has supplanted these stabilized grades for applications involving only welding or short time heating.
ASTM A240 321 Plate Specifications
| Description | ASTM A240 / ASME SA240 Stainless Steel Plates, ASTM A240 Hot Rolled Stainless Steel Plates |
| Standard | ASTM, ASME, BS, DIN, EN |
| Material | 321, 321H |
| Specification | Cold rolled: 1219mm * 2438mm (4′ x 8′), 1219mm * 3048mm (4′ x 10′), 1220mm * 2440mm, 1250mm * 2500mm or as your requirement.Hot rolled: 1500mm * 2000mm, 1000mm * 3000mm, 1500mm * 4000mm, 1500m * 6000mm or as your requiremnt. |
| Technique | Hot rolled plate (HR), Cold rolled sheet (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated) |
| Form | Shim Sheet, Perforated Sheet, Chequered Plate, Strip, Flats, Etc. |
| Surface | 2B, 2D, BA, NO. 1, NO. 4, NO.8, 8K, Mirror, Checkered, Embossed, Hair Line, Sand Blast, Brush, Etching |
| Thickness | 0.25-200mm, 0.3mm to 120mm |
| Width | 1000mm, 1219mm, 1500mm, 1800mm, 2000mm, 2500mm, 3000mm, 3500mm |
| Length | 2000mm, 2440mm, 3000mm, 5800mm, 6000mm, 12000mm |
| Package | Standard Export Seaworthy Package, or as required. |
| Value Added Services | Cladding,Heat Treatment,Annealed, Pickling, Polish,Rolling,Cutting,Bending,Forging,Minor Fabrication Etc. |
| MTC | Mill Test Certificate, Available as per EN 10204 3.1 |
ASTM A240 321 Plate Chemical Composition
| Type | Grade | ASTM A240 Chemical Composition | |||||||||
| ASTM(A240M) | Others(JIS) | C | Si | Mn | P | S | Ni | Cr | Mo | Others | |
| Austenitic Steels | |||||||||||
| 321 | SUS321 | ≤0.08 | ≤0.75 | ≤2.00 | ≤0.045 | ≤0.030 | 9.0/12.0 | 17.0/19.0 | ― | N≤0.10Ti:5ʷʢC+Nʣ/0.70 | |
ASTM A240 321 Plate Stainless Steel Plate Physical Properties
| 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 | |||||
| 321 | 8027 | 193 | 16.6 | 17.2 | 18.6 | 16.1 | 22.2 | 500 | 720 |
ASTM A240 Stainless Steel 321 Plate Mechanical Properties
| Type | Mechanical Properties for Stainless Steel Plates, Stainless Steel Sheet | |||||||
| ASTM(A240M) | Others(JIS) | Tensile Properties | Hardness | |||||
| Yield Strength (Mpa) | Tensile Strength (Mpa) | Elongation (%) | HBW | HRBW | ||||
| AusteniticSteels | ||||||||
| 321 | SUS321 | ≥205 | ≥515 | ≥40 | ≤217 | ≤95 | ||
SS 321 Plate Equivalent grades
| JIS G4304 | ASTM | UNS | KS | EN10095 | AS | CNS |
| SUS321 | 321 | S32100 | STS321 | 1.4541 | 321 | 321 |
Surface Finishes For ASTM A240 Steel Plates:
| Class | Definition | Application |
|---|---|---|
| No.1 | With heat treatment after hot rolling, pickling or equivalent. | Chemical tank, piping |
| No.2D | After cold rolling, carry out heat treatment and pickling or other equivalent processing. In addition, also including use of blunt surface roller to do final cold rolling slightly. | Heat exchanger, drain-pipe |
| No.2B | After cold rolling, carry out heat treatment and pickling or other equivalent processing. And use cold rolling processing to make surface brightness appropriately | Medical equipment, food industry, building materials, kitchen utensils |
| BA | After cold rolling, carry out bright heat treatment | Eat hutch appliance, electrical appliances, construction decoration |
| No.3 | Use 100# ~ 120# abrasives to do the grinding processing | Eat hutch appliance, construction decoration |
| No.4 | Use 150# ~ 180# abrasives to do the grinding processing | Eat hutch appliance, construction decoration, Medical equipment |
| No.8 | Use 600 # rotary polishing wheel to do the grinding | Mirror, decoration |
| HL | Use appropriate particle size of abrasives to do the grinding and make the surface with grinding stripe | Construction decoration |
ASME SA240 is identical with ASTM A240
ASTM A240 / A240M
STANDARD SPECIFICATION FOR CHROMIUM AND CHROMIUM-NICKEL STAINLESS STEEL PLATE, SHEET, AND STRIP FOR PRESSURE VESSELS AND FOR GENERAL APPLICATIONS
ASTM A240 specification covers chromium, chromium-nickel, and chromium-manganese-nickel stainless steel plate, sheet, and strip for pressure vessels and for general applications including architectural, building, construction, and aesthetic applications.
ASTM-A480 › Standard Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip
Table A2.17 Permitted Variation in Thickness of Hot-Rolled Mill Plate (Quarto Plate)*, **
| Width (w), in. [mm] | ||||
|---|---|---|---|---|
| Specified Thickness (t), in. [mm] | w ≤ 84 [2134] | 84 [2134] < w ≤ 120 [3048] | 120 [3048] < w ≤ 144 [3658] | w > 144 [ 3658] |
| Tolerance Over Specified Thickness, *** in. [mm] | ||||
| t < 3/16 [4.76] | 0.055 [1.35] | 0.070 [1.78] | — | — |
| 3/16 [4.76] ≤ t < 3/8 [9.52] | 0.045 [1.14] | 0.050 [1.27] | 0.085 [2.16] | — |
| 3/8 [9.52] ≤ t < 3/4 [19.05] | 0.055 [1.40] | 0.060 [1.52] | 0.085 [2.16] | 0.090 [2.29] |
| 3/4 [19.05] ≤ t < 1 [25.04] | 0.060 [1.52] | 0.065 [1.65] | 0.085 [2.16] | 0.100 [2.54] |
| 1 [25.40] ≤ t < 2 [50.80] | 0.070 [1.78] | 0.075 [1.90] | 0.095[2.41] | 0.115 [2.92] |
| 2 [ 50.80] ≤ t < 3 [76.20] | 0.125 [3.20] | 0.150[3.80] | 0.175 [4.45] | 0.200 [5.08] |
| 3 [76.20] ≤ t < 4 [101.6] | 0.150 [3.81] | 0.160 [4.06] | 0.200 [5.08] | 0.225 [5.72] |
| 4 [101.6] ≤ t < 6 [152.4] | 0.180 [4.75] | 0.200 [5.08] | 0.335 [8.50] | 0.355 [9.02] |
| 6 [152.4] ≤ t < 8 [203.2] | 0.235 [6.00] | 0.255 [6.48] | 0.355 [9.02] | 0.435 [11.0] |
| 8 [203.2] ≤ t < 10 [254.0] | 0.315 [8.00] | 0.335 [8.50] | 0.435 [11.0] | 0.550 [14.0] |
* Thickness is measured along the longitudinal edges of the plate at least 3/8 in. [9.52mm], but not more than 3 in. [76.20 mm], from the edge.
** For plates up to 10 in. [254.0mm], excl, in thickness, the tolerance under the specified thickness is 0.010 in. [0.25 mm].
*** For circles, the over thickness tolerances in this table apply to the diameter of the circle corresponding to the width ranges shown. For plates of irregular shape, the over thickness tolerances apply to the greatest width corresponding to the width ranges shown.
Below is the Tolerance for Flatness taken from ASTM A480
(Understand that this covers Mill Plates and not cut pieces)
Table A2.20 Permitted Variations in Flatness of Plate Mill Plate (Quarto Plate)
Note 1 — Tolerances in this table apply to any length, not necessarily the rolling direction, up to 36 in. [914mm] and to any 36 in. [914mm] of longer lengths in the plane of the plate measured while the plate rests on a flat surface with the concavity of the curvature upward.
Note 2 — If the longer dimension is under 36 in. [914mm], the tolerance is not greater than 1/4 in. [6.4mm].
Note 3 — for plates with specified minimum yield strengths of 35 ksi [240MPa] or more, the permitted variations are increased to 1 1/2 times the amounts shown.
| Specified Thickness (t), in. [mm] | Flatness Tolerance for Thicknesses Given, in. [mm] |
|---|---|
| t < 1/4 [6.35] | 7/16 [11] |
| 1/4 [6.35] ≤ t < 3/8 [9.52] | 3/8 [9.5] |
| 3/8 [9.52] ≤ t < 1/2 [12.70] | 5/16 [7.9] |
| 1/2 [12.70] ≤ t < 3/4 [19.05] | 5/16 [7.9] |
| 3/4 [19.05] ≤ t < 1 [25.40] | 5/16 [7.9] |
| 1 [25.40] ≤ t < 1 1/2 [38.10] | 1/4 [6.4] |
| 1 1/2 [38.10] ≤ t < 4 [101.60] | 1/4 [6.4] |
| t ≥ 4 [101.60] | 1/4 [6.4] |
How to order our A240 321 Plate?
Example 1，ASTM A240 321 Sheet/SA240 321 Plate ,size 16mmx1500mmx6000mm Qty 15 pcs.
