Baixe grátis o arquivo ASTM Apdf enviado por DANIEL no curso de Engenharia Mecânica. Sobre: Astm a ASTM A/AM(98), Austenitic, corrosion resistant, solution quenched and aged. 21 Sep Articles. Microstructure and Mechanical Properties of ASTM A CA6NM Steel Welded by.

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Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The PWHT hold time was chosen in order to be similar to a real large component stress relief treatment. The authors would like to express their gratitude to Dr. Post weld heat-treatment PWHT of this material is applied a7433 ensure a minimum residual stress of the component and increase the toughness.

Link to Active This link will always route to the current Active version of the standard. A number in parentheses indicates the year of last reapproval.

ASTM does not give any warranty express a7443 implied or make any representation that the contents of this abstract are accurate, complete or up to date. In addition, as mentioned before, no detectable defect has been found through X-ray analysis. This specification covers iron-chromium and iron-chromium-nickel alloy castings for general corrosion-resistant application.

ASTM A743 CF3M, 316L stainless steel casting

Table 2 presents the chemical composition of the weld metal. NOTE 2—Proper heat treatment of these alloys is usually necessary to enhance corrosion resistance and in some cases to meet mechanical properties.

Login to see your most recently viewed materials here. Failure to comply with the general requirements of Specification A constitutes nonconformance with this specification. The reduction of the toughness, as well as the high residual stresses, can shorten the life of the pieceas well as accelerate the cavitation process. According to Bilmes et al. Despite nearly identical toughness values of the weld metal from AW and PWHT samples, results of fracture analysis have shown distinct features in appearance of the fractures as depicted in Figure 12 and Figure The castings shall be subjected to heat treatment.


PWHT samples have shown the presence of dimples and microvoid, in contrast to the AW samples that showed typical appearance of cleavage.

The table 3 shows technical parameters used during the weld of the steel. Ashm work was divided into three main parts: In case of conflict between the requirements of this specification and Specification ASpecification A shall prevail.

MatWeb is intended for personal, non-commercial use. Both joints presented a martensitic microstructure, however, the heat treatment for residual stress relief precipitated a fine dispersion of austenite.

Parte 1 de 4 Designation: The plate was cut into four strips of 97xx45 mm which were then machined to make chamfers for X shaped welds, as shown in Figure 1. Characteristics and effects of austenite resulting from tempering of 13Cr-NiMo martensitic steel weld metals. A ceramic backing was added on the opposite side of the joint to provide a high quality root. HAZ heat affected zone and weld metal WM at surface and center.

Materials Science and Engineering: Science and Technology of Welding and Joining. The two joints were X-ray tested and have not presented any detectable defects.

CF16a | A Stainless Steel | MetalTek

It should be pointed out that this retained austenite is hardly observed by conventional metallographic techniques 6. Microhardness Vickers measurements were carried out in a Buehler MicroMet model using an applied load of gf for 30 seconds. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. The temperature control interpasses were also made with the aid of a pyrometer and contact thermometer.


Historical Version s – view previous versions of standard. Please read our License Agreement regarding materials data and our Privacy Policy. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Effect of delta ferrite on impact properties of low carbon 13Cr-4Ni martensitic stainless steel.

Cast Grade: CF16a

Effect of d-ferrite on impact properties of supermartensitic stainless steel heat affected zones. The microstructure and mechanical properties of the as-welded joint was compared to a joint which suffered a post welding heat treatment PWHT.

Questions or comments about MatWeb? Figure 4 illustrates the location of the microhardness measurements, including the base metal, weld metal and heat-affected zone. Astm a Astm a The steel shall be made by the electric furnace process with or without separate refining such as argon-oxygen decarburization. Vickers microhardness values of all regions of PWHT welded joint present lower hardness values compared to those of the as-welded joint.

Thus, both joints would be approved in accordance to this criterion. In addition, a smoother hardness values distribution is observed among the different regions of the PWHT sample, making the hardness values of the weld metal close to those of base metal. This abstract is a brief summary of the referenced standard. In the present work, more Charpy coupons where tested as follow: