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Astm a568 pdf

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This standard is issued under the fixed designation A/AM; the 1 This specification is under the jurisdiction of ASTM Committee A01 on. ASTM A, AM_Steel, Low alloy - Designation: A /A M – 02 An American National Stand. Home; ASTM A/AMa. $; Add to Cart. Printed Edition + PDF;; Immediate download; $; Add to Cart.


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Designation: A/AM – Steel, Sheet, Carbon, Structural, and High-Strength, Low- steel sheet in coils and cut lengths. This specification covers the general requirements for tions are expressed in both inch-pound units and SI units. specifications that describe carbon steel, structural steel, and fication designation (SI units), the material shall be furnished. high-strength, low-alloy steel. A / AMa Standard Specification for Steel, Sheet, Carbon, Structural, and 31, $ Standard + Redline PDF Bundle ASTM License Agreement.

Final interstitial solute levels are very low and, as a result, batchannealed low-carbon steels have excellent resistance to aging. These imperfections shall be otherwise specified. Tolerances for high-strength, low-alloy steel with speci? Application of this table to product in coil form is not appropriate unless the coil has been rolled out and adequately? No Tolerance Under Over 30 to B A Where an ellipsis. The Xs are the critical major strains as determined from help.

See Practice E The sampling may be facilitated by folding the sheet both ways, so that several samples may be taken at one drilling. Steel subjected to certain heating operations by the purchaser may not give chemical analysis results that properly represent its original composition. Therefore users must analyze chips taken from the steel in the condition in which it is received from the steel manufacturer.

They must not be overheated during cutting to the extent of causing decarburization. Chips must be well mixed and those too coarse to pass a No. Sieve size numbers are in accordance with Speci? Mechanical Properties 6. There are many interrelated factors that affect the ability of a given steel to cold form over a given radius under shop conditions.

These factors include thickness, strength level, degree of restraint, relationship to rolling direction, chemistry and microstructure. Each of the appropriate product speci? This is not considered to be a fault of the steel but is rather a function of the induced cold-work or heat-affected zone. General Requirements for Delivery 7. When different grades of strand-cast steel are sequentially cast, identi? B If the minimum of the range is 0. C If the minimum of the range is 0.

Dimensions, Tolerances, and Allowances 8. The appropriate tolerance tables shall be identi? These methods are explained in Appendix X5. Finish and Condition 9. The oxide or scale can be removed by pickling or blast cleaning when required for press-work operations or welding.

Hot-rolled and hot-rolled descaled sheet is not generally used for exposed parts where surface is of prime importance. Mill edges are the natural edges resulting from the hot-rolling operation.

They do not conform to any particular contour. They may also contain some edge imperfections, the more common types of which are cracked edges, thin edges feather , and damaged edges due to handling or processing and which should not extend in beyond the ordered width. These edge conditions are detrimental where joining of the mill edges by welding is practiced.

When the purchaser intends to shear or to blank, a sufficient width allowance should be made when purchasing to ensure obtaining the desired contour and size of the pattern sheet.

The manufacturer may be consulted for guidance. Cut edges are the normal edges which result from the shearing, slitting, or trimming of mill-edge sheet.

Processed coils such as pickled or blast cleaned are supplied with square-cut ends. This class will meet requirements for controlled surface texture, surface quality, and? It is normally processed by the manufacturer to be free of stretcher strain and?

A568 pdf astm

Subsequent user roller leveling immediately before fabrication will minimize strain resulting from aging. With some surface preparation matte? It is not generally recommended for bright plating. With some surface preparation commercial bright?

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If sheet is deformed in fabrication the surface may roughen to some degree and areas so affected will require surface preparation to restore surface texture to that of the undeformed areas. The luster may not be retained after fabrication; therefore, the formed parts will require surface preparation to make them suitable for bright plating.

Unexposed cold-rolled sheet may contain more surface imperfections than exposed cold-rolled sheet because steel applications, processing procedures, and inspection standards are less stringent. SI Units A1. Cut Edge and 3? This table does not apply to the uncropped ends of mill edge coils. NOTE 2—The speci? NOTE 3—Micrometers used for measurement of thickness shall be constructed with anvils and spindles having minimum diameters of 0.

The tip of the spindle shall be?

Pdf astm a568

Micrometers with pointed tips are not suitable for thickness measurements. Thickness Tolerances Over, in.

Astm A568.pdf

Over 0. A Over 0. A Where an ellipsis. Product not available in this size range. Cut Edge and 1-in. NOTE 4—This table was constructed by multiplying the values in the standard table by 0. Oiling must be speci? If the product is not to be oiled, it must be so speci?

Workmanship Unexposed or annealed cold-rolled sheet is intended for applications where surface appearance is not of primary importance, that is, unexposed applications. Thickness Tolerances, Over, in.

Thickness Tolerances All Over, in. Cut lengths may contain random minor surface imperfections that can be removed with a reasonable amount of metal?

In addition, unexposed cut lengths can be expected to contain more minor imperfections such as pits, scratches, sticker breaks, edge breaks, pinchers, cross breaks, roll marks, and other surface imperfections than exposed. These imperfections shall be acceptable to the purchaser without limitation.

Also read: ASTM D1238 PDF

No Tolerance Under? No Tolerances Under Under 30 0. Over 30 to 48 incl 5 32 1? A The above tolerances do not apply to the uncropped ends of mill edge coils Camber Tolerances, in. Over Over Over Over Over 12 30 48 60 80 to to to to 30 48 60 80 incl incl incl incl? Unexposed coils contain more surface imperfections than exposed coils. Retests and Resampling It is also obtained by measuring the difference between the diagonals of the cut length.

The out-of-square deviation is one half of that difference. The tolerance for all thicknesses and all sizes is 1? The individual tolerance for over-width, overlength, camber, or out-of-square should not exceed 1? For cut lengths wider or longer, the applicable tolerance is 1? B Application of this table to product in coil form is not appropriate unless the coil has been rolled out and adequately? C Maximum deviation from a horizontal? D Tolerances for steels with speci?

Inspection Rejection and Rehearing The manufacturer shall be noti? In the event that the manufacturer is dissatis? Test Reports and Certi? However, the document shall clearly identify the organization submitting the document. Notwithstanding the absence of a signature, the organization submitting the document is responsible for the content of the document. The new sample shall be taken from the material in question.

If the results of the this new specimen meet the speci? Such discarded material shall not be quali? Resampling any lot more than twice shall not be permitted.

If the material is resampled, two tests will be required. If the results of both resampling test specimens meet the speci? A total of two resampling efforts will be permitted. The tip of the spindal shall be? B Thickness Tolerances, Over, in. Where an ellipsis. To 12, incl A To 0. NOTE 3—The industry de? Product Marking No Tolerances Under? NOTE 1—Camber is the greatest deviation of a side edge from a straight line, the measurement being taken on the concave side with a straightedge.

NOTE 2—This table applies to widths produced by slitting from wider sheet. NOTE 2—This table also applies to lengths cut from coils by the consumer when adequate? Flatness Tolerance,A in. No Tolerance Under 12 34 45 to 50B incl.

Width, Not Resquared, and 0. To 6, incl Over 6 to 9, incl Over 9 to 12, incl A Maximum deviation from a horizontal? Tolerances for high-strength, low-alloy steel with speci? Packing and Package Marking The ability of manufacturers to meet the maximum coil weights depends upon individual mill equipment. When required, minimum coil weights are subject to negotiation.

Keywords B to to , incl to , to , 0. Length Tolerance, Over Only, mm 6 8 12 20 25 35 40 45 NOTE 1—Thickness is measured at any point across the width not less than 15 mm from a cut edge and not less than 25 mm from a mill edge. Cut Length, mm Over The tolerance for all thicknesses and all sizes is 1. The individual tolerance for over-width, overlength, camber, or out-of-square should not exceed 1. For cut lengths wider or longer, the applicable tolerance is 3.

Application of this table to product in coil form is not appropriate unless the coil has been rolled out and adequately? Maximum deviation from a horizontal surface. D Tolerances for high-strength, low-alloy steels with speci? C Maximum deviation from a horizontal surface. NOTE 2—Widths up to and including mm in this table apply to widths produced by slitting from wider sheet.

NOTE 3—The speci? NOTE 4—Micrometers used for measurement of thickness shall be constructed with anvils and spindles having minimum diameters of 0. C Through 0. Not applicable to widths under mm. NOTE 5—This table was constructed by multiplying the values in the standard table by 0. C Where an ellipsis.

Tolerance Over Speci? Width, mm Through , incl A Camber Tolerances 5. NOTE 3—Application of this table to product in coil form is not appropriate unless the coil has been rolled out and adequately? Flatness Tolerance, mm Speci?

This problem is avoided in most cases by temper rolling the sheet after annealing. After temper rolling, however, some sheet products are susceptible to aging. Aging refers to a gradual increase in yield strength and corresponding decrease in ductility during storage after temper rolling. Aging always has a negative effect on formability and, when aging leads to the redevelopment of an upper yield point, can result in renewed susceptibility to?

Solute carbon or nitrogen atoms are those not chemically combined with other elements in the steel as carbides or nitrides, for example. Over time, these carbon or nitrogen interstitial solute atoms diffuse to crystalline imperfections within the steel and, in so doing, give rise to aging.

The extent to which aging occurs depends on the interstitial solute level and the combination of temperature and time to which the steel is exposed after temper rolling. In general, higher interstitial solute levels result in larger strength increases during storage; the rate of aging increases with increasing temperature. As described as follows, the? During heating, any solute nitrogen present in the full-hard sheet combines with aluminum to form aluminum nitride.

Subsequent cooling is very slow and allows essentially all of the carbon to precipitate as iron carbide. This is not considered Copper 0. A Nickel to 1. Molybdenum to 0. General Requirements for Delivery Niobium 7. A to inch-pound or metric decimal thickness only and the Nitrogen to 0. A Where an ellipsis. When different grades of strand-cast steel are sequentially cast, B If the minimum of the range is 0. C If the minimum of the range is 0. Processed coils such as pickled or blast cleaned are products covered by this specification are contained in Tables supplied with square-cut ends.

The appropriate toler- 9. This class will meet requirements for controlled surface 8. It is normally processed and Table 16 for hot-rolled sheet and Table 25 for cold-rolled by the manufacturer to be free of stretcher strain and fluting. Subsequent user roller leveling immediately before fabrication 8. These methods are 9.

With some surface preparation matte steepness and rejection limits are subject to negotiation be- finish is suitable for decorative painting. It is not generally tween the purchaser and the producer. Finish and Condition having a surface texture intermediate between that of matte and 9.

With some surface preparation commercial bright resulting from the hot-rolling operation. The oxide or scale can finish is suitable for decorative painting or certain plating be removed by pickling or blast cleaning when required for applications.

If sheet is deformed in fabrication the surface press-work operations or welding. Hot-rolled and hot-rolled may roughen to some degree and areas so affected will require descaled sheet is not generally used for exposed parts where surface preparation to restore surface texture to that of the surface is of prime importance. Mill edges are the natural edges resulting rolling on ground rolls and is suitable for decorative painting or from the hot-rolling operation.

They do not conform to any plating with additional special surface preparation by the user. They may also contain some edge imper- The luster may not be retained after fabrication; therefore, the fections, the more common types of which are cracked edges, formed parts will require surface preparation to make them thin edges feather , and damaged edges due to handling or suitable for bright plating.

These edge conditions are detrimental where joining of applications, is not subject to limitations on degree and the mill edges by welding is practiced. When the purchaser frequency of surface imperfections, and restrictions on texture intends to shear or to blank, a sufficient width allowance should and mechanical properties are not applicable. The manufacturer may be tendency toward fluting and stretcher straining. Unexposed consulted for guidance. Cut edges are the normal edges which cold-rolled sheet may contain more surface imperfections than result from the shearing, slitting, or trimming of mill-edge exposed cold-rolled sheet because steel applications, process- sheet.

Where with a matte finish, unless otherwise specified. A Tolerances for hot-rolled carbon sheet steel with 0. This table does not apply to the uncropped ends of mill edge coils.

NOTE 2—The specified thickness range captions also apply when sheet is specified to a nominal thickness, and the tolerances are divided equally, over and under.

NOTE 3—Micrometers used for measurement of thickness shall be constructed with anvils and spindles having minimum diameters of 0.

A568 pdf astm

The tip of the spindle shall be flat, and the tip of the anvil shall be flat or rounded with a minimum radius of curvature of 0. Micrometers with pointed tips are not suitable for thickness measurements. Thickness Tolerances Over, in. Specified Width, in. B Product not available in this size range. Cut Edge and 1-in. NOTE 4—This table was constructed by multiplying the values in the standard table by 0.

Oiling must be specified, when required. If the product is not to be oiled, it must be so cut lengths. Unexposed or annealed cold-rolled metal finishing by the purchaser. Workmanship Thickness Tolerances, Over, in. NOTE 2—The specified thickness tolerance range captions also apply when sheet is specified to a nominal thickness, and the tolerances are divided equally, over and under.

Thickness Tolerances All Over, in. Cut lengths may contain random minor surface lengths. In addition, unexposed lished standards. Coils will pinchers, cross breaks, roll marks, and other surface imperfec- contain such imperfections which shall be acceptable to the tions than exposed. Coils the purchaser without limitation. Length, in. No Specified Width, Specified Width, in.

Tolerance Under in.

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Over 80 2 A The above tolerances do not apply to the uncropped ends of mill edge coils Cut Length, ft in. No Tolerance ances, in. Unexposed A The camber tolerance for coils is 1 in. Retests and Resampling marked on the specimen before testing, a retest is allowed.

Out-of-square is the greatest deviation of an end edge from a straight line at Specified Minimum Specified Width, Specified Yield right angle to a side and touching one corner. It is also obtained by measuring Thickness, in. Strength, min, ksi the difference between the diagonals of the cut length. The out-of-square deviation is one half of that difference. For cut lengths wider C Maximum deviation from a horizontal flat surface. D Tolerances for steels with specified minimum yield strength in excess of 50 ksi are subject to negotiation.

Inspection Strength, min, ksi satisfy him that the steel is being produced and furnished in Under 45 to 50D,E 45 accordance with the specification. Mill inspection by the purchaser shall not interfere unnecessarily with the manufac- 0. The manufac- Tolerances for steels with specified minimum yield strength in excess of 50 ksi are subject to negotiation. In the event that resampling is permitted. The new sample shall be taken from the manufacturer is dissatisfied with the rejection, he may the material in question.

If the results of the this new specimen request a rehearing. Test Reports and Certification more than 2 ksi 14 MPa from the required tensile properties, Such discarded Resampling any lot more than twice shall not be been manufactured and tested in accordance with the require- permitted. If the material is resampled, two tests will be ments of the material specification. The first test shall be adjacent to the beginning of the However, the document shall clearly identify the orga- within the lot be qualified.

If the results of both resampling test nization submitting the document.

A568 pdf astm

Notwithstanding the ab- specimens meet the specified requirements, the lot will be sence of a signature, the organization submitting the document accepted. A total of two resampling efforts will be permitted. The tip of the spindal shall be flat, and the tip of the anvil shall be flat or rounded with a minimum radius of curvature of 0.

B Where an ellipsis. EDI is the subsequent test report. Product Marking regarded as having the same validity as a counterpart printed in Notwithstanding the attached to each coil or shipping unit.

Specified Length, in. NOTE 2—This table applies to widths produced by slitting from wider in. No Tolerances Under sheet. Cut Length Sheets, to 12 in. NOTE 1—This table applies to widths produced by slitting from wider sheet. Flatness Tolerance,A in. Specified Specified Yield Specified Width, in.

Tolerances Over Specified Thickness, in. Point, min, ksi Specified Length, in. No Tolerance Under Under 45 45 to 50B incl. Width, Not Resquared, and 0. Maximum deviation from a horizontal flat surface. B Tolerances for high-strength, low-alloy steel with specified minimum yield point to 0. Width Tolerance, Specified Width, in.

Plus and Minus, in. To 6, incl 0. Bar coding should be consistent with the Over 6 to 9, incl 0. Packing and Package Marking for shipment in addition to requirements specified in the Keywords minimum or range of inside diameter, maximum outside The ability of manufacturers to meet the maximum coil weights depends sheet; general delivery requirements; high strength low alloy upon individual mill equipment.

NOTE 2—The specified thickness range captions also apply when sheet NOTE 2—The specified thickness range captions also apply when sheet is specified to a nominal thickness, and the tolerances are divided equally, is specified to a nominal thickness, and the tolerances are divided equally, over and under.

NOTE 3—Micrometers used for measurement of thickness shall be NOTE 3—Micrometers used for measurement of thickness shall be constructed with anvils and spindles having minimum diameters of 0. The tip of the spindle shall be flat, and the tip of the anvil in. Micrometers with pointed tips are not suitable for thickness [2. Specified Width, mm Through 2. B A Where an ellipsis.

Over Through This table does not apply to the uncropped ends of mill edge coils. The tip of the spindle shall be flat, and the tip of the anvil Over It is also obtained by measuring the difference between the diagonals of the cut length. The tolerance for all thicknesses and all sizes is 1. The individual tolerance for over-width, over- length, camber, or out-of-square should not exceed 1.

For cut lengths wider or longer, the applicable tolerance is 3. B Application of this table to product in coil form is not appropriate unless the coil has been rolled out and adequately flattened with all coil set removed. C Maximum deviation from a horizontal surface.

D Tolerances for high-strength, low-alloy steels with specified minimum yield strength in excess of MPa are subject to negotiation. NOTE 2—Widths up to and including mm in this table apply to widths produced by slitting from wider sheet. NOTE 3—The specified thickness range captions also apply when sheet is specified to a nominal thickness, and the tolerances are divided equally, over and under. NOTE 4—Micrometers used for measurement of thickness shall be constructed with anvils and spindles having minimum diameters of 0.

B Not applicable to widths under mm. C Where an ellipsis. NOTE 5—This table was constructed by multiplying the values in the standard table by 0. NOTE 2—This table applies to widths produced by slitting from wider 6 20 sheet. Over Through der , mm NOTE 3—Application of this table to product in coil form is not 15 appropriate unless the coil has been rolled out and adequately flattened 20 with all coil set removed.

Over Through B Tolerances for high-strength, low-alloy steel with specified minimum yield point 50 0. The develop during subsequent forming. This problem is avoided in faster cooling, in particular, results in higher levels of intersti- most cases by temper rolling the sheet after annealing. After tial solute in the product as compared with batch annealing. Aging refers to a gradual increase in yield strength and minimize the solute carbon level, and temper rolling is effec- corresponding decrease in ductility during storage after temper tive for reducing fluting tendencies.

However, continuous- rolling. Aging always has a negative effect on formability and, annealed low-carbon steels are more prone to subsequent aging when aging leads to the redevelopment of an upper yield point, than batch-annealed steels. Solute carbon or producer. To minimize aging effects in continuous-annealed nitrogen atoms are those not chemically combined with other products, rotation of stock by fabricating the oldest material elements in the steel as carbides or nitrides, for example.

Over time, these carbon or nitrogen interstitial solute atoms diffuse to crystalline imperfections within the steel and, in so X1. The extent to which aging occurs essentially no interstitial solutes and, as a result, are nonaging. In general, higher interstitial solute levels result in stable carbides and nitrides, such as titanium or columbium larger strength increases during storage; the rate of aging niobium.

These steps ensure that total interstitial levels are increases with increasing temperature. As described as follows, very low, and that the interstitials are all chemically combined the final interstitial solute level and aging characteristics or stabilized in the form of alloy carbides or nitrides. This nonaging, interstitial-free product mainly through the formation of aluminum nitride and iron is suitable for exposed applications with the most severe carbides within the steel during processing, which is influenced forming requirements.