Application – A is the application of stainless steel just for use in boilers, etc. ASME A is for all applications of stainless steel bars and other shapes. A specifically defers bars for reforging and free machining grades to other ASTM standards (A and A/AM) while A is silent on. ASTM A Standard Specification for Stainless Steel Bars and Shapes_物理_ 自然科学_专业资料。Standard Specification for Stainless Steel.
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ASTM A – Free Download PDF
This standard has been approved for use by agencies of the Department of Defense. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently qstm the other.
Combining values from the two systems may result in non-conformance with the standard. Current edition approved Nov. Originally approved a79 Grain Size for Austenitic Grades 6. Mechanical Properties Requirements 7. Astmm least one room-temperature test shall be performed by the manufacturer on a sample from at least one asmt or shape from each lot of material. Testing for Intermetallic Compounds 9. NOTE 2—Many, if not all, duplex stainless steels and some austenitic stainless steels will form intermetallic phases or compounds such as sigma, chi, and laves phases when exposed to temperatures below the specified annealing temperature or cooled slowly from a higher temperature during casting, welding, or annealing.
These phases can have a negative effect on mechanical properties and corrosion resistance. These phases can typically be removed by correct annealing and cooling practices. The presence of these phases can be demonstrated by tests, typically astj metallography, impact toughness, or corrosion resistance, although the testing requirements may be different for different alloy grades. Such testing may or may axtm be routinely performed by the manufacturer.
The certification shall be positively relatable to the lot of material represented. Austenitic Grades N Alloy 20 0. S S S S B Maximum unless otherwise indicated. C Except as required for specific alloy type, molybdenum, titanium, nickel, cobalt, tantalum, nitrogen, and copper need not be reported but shall not be present in other than residual amounts, the intent being to prohibit substitution of one alloy type for another due to absence of control of the above named elements in certain alloys.
D See Supplementary Requirement S1. E American Welding Society designation. F Nitrogen content is to be reported for this grade.
H Product analysis tolerance over the maximum limit for carbon and nitrogen to be 0. Continued Tensile Strength, min, ksi [MPa] Condition annealed annealed annealed annealed annealed annealed Martensitic Grades annealed 1 2 3 tempered tempered normalized and tempered annealed tempered annealed quenched and tempered 60 70 65 60 70 70 Yield Strength,A min, ksi [MPa] Elongation in 2 in. C The material shall be capable of meeting the required reduction of area where listed, but actual measurement and reporting of the reduction of area are not required unless specified 4a79 the purchase order.
F Tensile strength 70 ksi [ MPa] min permitted for extruded shapes. G For bars greater than 2 in.
H Elongation in 2 in. I Elongation in 2 in.
J Annealed bars shall be capable of meeting the tempered condition requirements when heat treated. Materials for High-Temperature Service S1. The grain size shall be reported w479 a Certified Test Report. All austenitic stainless steels shall be capable of passing intergranular corrosion tests in the as-shipped condition. Tests shall be performed in accordance with Practice E of Practices A The analysis shall meet the requirements of Table 1.
In the event of failure, the lot represented shall be rejected except that, at the option of the x479, each bar in the lot may be tested for acceptance.
Product analysis tolerance provisions do not apply.
Bars furnished in lengths of 20 ft [6 m] and over shall be tested at each end. The test method sreporting requirements, and acceptance criteria shall be agreed upon by the manufacturer and purchaser in the purchase agreement.
Thus, solution annealing also can be a79 for nonstabilized grades by taking advantage of hot rolling temperatures which always exceed solution annealing temperature requirementsmaintaining hot rolling finishing temperatures well above minimum solution annealing requirements, and immediately quenching integral with hot rolling.
Stabilized grades with columbium or titanium added adtm be handled this way, since they would become destabilized due to columbium or titanium carbide solution, without subsequent reheating. For that reason, a minimum grain size has been required of the H grades created for optimum elevated temperature propertiesand a mandatory grain size test and report has been added for the non—H grades so that the information is available for those desiring to reclassify a non—H grade aetm H grade.
Approved Asym 1, Approved May 1, ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not a749, either reapproved or withdrawn.
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Stainless Steel ASTM A479 Round Bars Supplier
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