ASTM A240 Uns S31803 Plate,A240 UNS S32205 Duplex Stainless Steel Plate,X2crnimon22-5-3 En 1.4462 Plate
We are a professional supplier and exporter of X2crnimon22-5-3 En 1.4462 ASTM A240 Uns S31803 Plate,UNS S32205 Duplex Stainless Steel Plate
A240 S31803 plates are made from duplex stainless steel alloy S31803, which typically contains chromium, nickel, molybdenum, and nitrogen. This composition provides excellent corrosion resistance, high strength, and good weldability.
A240 S31803 plates offer superior corrosion resistance in a wide range of corrosive environments, including those containing chlorides, sulfides, and acids. They are highly resistant to pitting, crevice corrosion, and stress corrosion cracking, making them suitable for use in offshore platforms, chemical processing plants, and marine environments.
Duplex S31803, also known as stainless steel grade 2205, is a standardized formulation that conforms to UNS specification regulations.
Duplex UNS S31803/S32205 is used for corrosive environments and is resistant to localized corrosion such as pitting, crevice corrosion and stress corrosion cracking. Due to its austenitic ferritic chemical composition, the pipe material has mechanical properties capable of handling high stress conditions.
ASTM A240 is Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
Standard: ASTM A240 Delivery Condition: Cold Rolled or Hot Rolled.
- Thickness: 2mm-60mm
- Length: 1000mm-6000mm or customized
- Width: 600 to 1500mm or customized
- Application: Pressure vessel plate, chemical process vessel equipment
Chemical Composition of A240 UNS S31803 plate
Chemical Composition( %):
| Grade/ Material | Element | Composition( Max-A, Min-I) |
| ASTM A240/ A240M UNS S31803 | C | A:0.03 |
| Mn | A:2 | |
| Si | A:1 | |
| P | A:0.03 | |
| S | A:0.02 | |
| Cr | 21-23 | |
| Ni | 4.5-6.5 | |
| Mo | 2.5-3.5 | |
| N | 0.08-0.2 | |
| Cu | — |
A240 UNS S31803 plate Mechanical Properties( Mpa)
| Grade/ Material | Tensile Test | |
| ASTM A240/ A240M UNS S31803 | Tensile Strength/ Mpa | 620 |
| Yield Strength/Mpa | I:450 | |
| Elongation/% | I:25 | |
| Hardness Rockwell B | — | |
ASTM A240 UNS S31803 Plate is a duplex grade with a ferritic-austenitic microstructure which enables combining improved resistance to pitting, stress corrosion, high strength, crevice corrosion and cracking.
SA 240 S31803 Plate resists sulfide stress corrosion and chloride environments. It consists of around 40-50% ferrite in the annealed condition. Its high temperature strength are similar to stainless steel 430 in the range of 950~1150°C. However it shows rapid increase in the strength below 900°C. Cold workability is required as proof stress is high and elongation is low as compared to stainless steel 304.It is useful in application of oil & gas, pressure vessels, hydro power, pulp & paper, chemical tankers and structural components. It is not recommended to be used at temperatures above 300°C due to embrittlement.
ASTM A240 UNS S32205 Sheet has high strength of the ferritic grades while keeping the corrosion resistance of the austenitic grades. It has combination of good mechanical strength and ductility with moderate to good corrosion resistance in a variety of environments.
SA 240 UNS S32205 Plate is used as a practical solution to chloride-induced stress cracking, which is the achilles’ heel of stainless steel. It has magnetic property that can be used to easily differentiate them from common austenitic stainless grades.
ASTM A240 Stainless Steel Plates in Hot Rolled and Cold Rolled with Surface Finish Like Mill Finish, No.1, 2B, 2D, No.4, No.8, Mirror, Brush, Hairline etc. with NACE MR O1-75, Intergranular Corrosion Test A262 Practice E, Mercury Free in Width of 1250 / 1500 / 2000 mm and Custom Size from 0.6 to 80 mm Thickness.
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.
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 |
ASTM A240 UNS S31803 Plate are refer to ASTM A480 Plate Thickness & Flatness Tolerances
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] |
