Astm a924 pdf free download

Requirements for all adequately characterize the lot of material being tested. A The thickness measurement shall be made before 7. A minimum of five random full-width traverses shall be used to characterize each 7. Tests for Coating Properties coil tested. These three is the total amount on both sides of the sheet, expressed in results shall then be averaged to obtain the triple-spot average ounces per square foot [grams per square metre] of sheet.

The specimen shall be cut not less than 2 in. If one surface is protected mm] from the edges of the test sheet. Dimensions and Permissible Variations 7. The edge and in Table 11 for sheet specified to restricted flatness. A description of these two in. Specimens shall be at least standard is subject to negotiation between the purchaser and 2 in.

For product the producer. Number of Tests and Retests 7. The [mass], or in those cases where only one test is needed, it shall producer and user shall agree to a frequency other than that be that single test result. NOTE 2—Regardless of whether total thickness tolerance is specified equally or unequally, over and under, the total tolerance shall be equal to twice the tabular tolerances.

NOTE 3—Micrometers used for measurement of thickness shall be constructed with anvils and spindles having minimum diameters of 0. The tip of the anvil shall be flat or rounded with a minimum radius of curvature of 0. Micrometers with conical tips shall not be used for thickness measurements of sheet steels. Inch-Pound Units Specified Width, in. Thickness Tolerances, Plus and Minus, in. A Over Through Through 0.

B Thickness is measured at any point across the width not less than 10 mm from a side edge. Contents hide. Titanium To 0.

Tolerance over specified length. No minus tolerance. Tolerance over specified width. Share on facebook Facebook. Share on twitter Twitter. Share on linkedin LinkedIn. Share on pinterest Pinterest. Latest Posts. What is chromated? April 21, No Comments. The following supplementary requirements shall apply only when specified by the purchase order or contract.

A,B Over Through Through 0. B The specified thickness range captions apply independently of whether the ordered thickness is stated as nominal or minimum. D Thickness is measured at any point across the width not less than 10 mm from a side edge.

This test may be used as a basis for coating may be obtained by converting coating thickness acceptance, but rejection shall be governed by the weight measurements made with magnetic gauges. An accuracy of [mass] of coating tests described in Section 8. This is in difficult to achieve. The versions. Roll-application and drying are recommended prior to coiling.

Characteristics include the reduction or elimi- X2. While some of these metal [Zn-Mn-Ni], tricationic microcrystalline phosphate crys- products are paintable within a prescribed timeframe, it is tals are applied as a surface treatment within a 0.

Application is generally performed from of post-painted product. The coated surface is dried using a simple IR or convection oven, heating X2. The can be manufactured from both organic and inorganic materials phosphate coating is often oiled using simple mill oil in order that may be pigmented with calcium phosphates, titanium to inhibit corrosion and moisture pickup by the phosphate silicon phosphates, etc.

These are roll-applied from solution crystals during transport and storage. This type of coating is and dried. While most of these coatings accept a post-paint, it applied to aid in formability. Once formed, these products are is recommended to verify durability of particular systems with cleaned, and rephosphated prior to painting.

Coating weights vary by application. These materials removable solid film acrylic coatings can be applied from are utilized to enhance formability. Note that some of these coatings require a minimum peak corrosion and short blanking during the forming operation. The low surface friction characteristics of these coatings are excellent for formability X2.

No oiling of X2. As many properties are formula driven, all cannot be incorporated here. Check with the supplier for product tailoring when properties such as resistivity, weldability, anti-fingerprinting, microbial resistance, tinting or transparency are specified or required. NOTE X3. October 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 revised, either reapproved or withdrawn.

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A superscript epsilon e indicates an editorial change since the last revision or reapproval. The sheet is metallic coated by the Determine Conformance with Specifications4 hot-dip process.

Material for this use is furnished in coils, flat 3. Terminology in cut lengths, and corrugated in cut lengths. Many metallic coated materials are covered in this material specification. The following definitions Five different metallic coatings are included: are as stated in that terminology: 1. Other metallic coatings are available in one coating pipe is made. Within the text, 3. The values stated in each for corrugated steel pipe, the fabricator may also be considered system are not equivalents; therefore, each system must be as the purchaser of the sheet, where that term is used in this used independently of the other.

Combining values from the specification. Such interpretation would not restrict the pur- two systems may result in nonconformance with the specifi- chaser of the finished pipe from enforcing any provisions of cation. Referenced Documents 3.