Duplex UNS S32750 Coil has very low corrosion ratios under very high corrosive conditions. SA 240 UNS S32750 Strips & A240 gr S32750 Sheet are used in applications such as automobile and construction industries to provide minimal size and weight at the same time with high tensile strength. It can stand high wear and tear more than other types of steels. Conversely, if the material has mechanical properties that depend on a particular (or preferred) orientation(s), it is said to be anisotropic.įrom what you have described as end application "tie-down for a transmission for a helicopter during transport, not during actual usage", it is not clear as to what the design stadard is, hence, in my view, for you to have an objective conclusion in this matter, you need to know the design standard based on which the personnel who gave the requirement, put the dimensions in the first place if the dimension and product specification was given based on past experience by your personnel or your cleint, you may call him for a dialogue and ask him the exact technical rationale for such rejection and offer mitigation measure by destroying a couple of pieces (as assurance testing) by subjecting the items to test that the client wants as assurance.ASTM A240 UNS S32750 Plate SA 240 UNS S32750 Coil suppliers, ASTM A240 gr S32750 Sheet stockist in Dubai, UAE,ĪSTM A240 UNS S32750 Plate is applied in high tension and high corrosion environments. Material anisotropy (or simply anisotropy) is a term used to describe the dependence of material properties, such as fracture toughness, yield strength, and elastic modulus, to the texture.When a material has mechanical properties that are independent of direction, it is said to be isotropic. Undergoes through processes such as heat treating. Additionally, the fracture toughness of a material is affected by the microstructural and mechanical changes a material Some of the The forming process of a material, such as drawing, extruding, rolling, or forging, can have a great effect on the microstructure and texture (preferred grain orientation) of the material. In the following industry some times (depending on the end application of the item) emphasisis on selecting a particular product form may be given by design personnel due to concerns related to Material Orientation and Anisotropy. If the A276/A479 bars procured by you are in Annealed condition, then your problems are reduced to substantial degree.Ģ) Is there an compelling reason for selecting one product form over the other? It is my argument that the only difference between these three ASTM specifications is the designation of the material as Plate, Bar, Shapes, etc and does not have any bearing on the characteristics of the material itself.Īny thoughts or comments on this (sources comparing the two/three would be extremely helpful) would be greatly appreciated.Īidan RE: A240 vs A276/A479 EdStainless (Materials) 5 Nov 14 10:40Ī) An item (SS 304) procured under A276 can beĬondition S-Strain Hardened-Relatively light cold workī) An item (SS 304) procured under A 479 can beĬ) An item (SS304) procured under A240 shall be solution annealed The material we bought came with certifications - all Mechanical requirements exceed A240/276/479 and Chemical comp's fall within guidelines. Our client, whom is the one actually contracted with the helicopter mfg, is rejecting this material and citing the incorrect ASTM designation. We bought the above size, but in A276/A479 as that is the specification for bar (4" width) vs plate that we would have had to burn/cut here. There are a few holes that are added thru the 1" thickness - I believe the part is used as a tie-down for a transmission for a helicopter during transport, not during actual usage. I am working on a project that specified 1.00 x 4.00 x 9.0 Type 304L/ASTM A-240 for a certain part that is final machined to a size of 1.00(STK) x 4.00 x 8.50. Please bear with my explanation below as I am a Civil Engineer working in a custom equipment building shop currently and am still working through all of the proper terminology.
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