These mechanical property values are nonmandatory. They are intended solely to provide the purchaser with as much information as possible to make an informed decision on the steel to be specified. Values ou side of these ranges are to be expected. Your email address will not be published.
Get A Quote. ASTM A Contents hide. Share on facebook Facebook. Share on twitter Twitter. Share on linkedin LinkedIn. Share on pinterest Pinterest. Latest Posts. Please enable JavaScript in your browser to complete this form. Send Inquiry. The 5. Classification width, flatness requirements, and length, if cut lengths. Specification B6 NOTE 1—Typical ordering descriptions are as follows: steel sheet, specifies certain grades of zinc that do not exceed 0.
G, chemically treated, oiled, minimum 0. Chemical Composition class, or both. When the amount of the lower yield stress, after a prestrained specimen has been copper, nickel, chromium, or molybdenum is less than 0. When the amount of vanadium, titanium, or columbium 7. When the amount of boron is less sheet designations are listed in Table 5. These mechanical than 0. They are intended solely to value. Values procedures and product analysis tolerances.
A Where an ellipsis. B For steels containing 0. C When a deoxidized steel is required for the application, the purchaser has the option to order CS and FS to a minimum of 0. E For carbon levels less than or equal to 0.
In such cases, the applicable limit for vanadium and columbium shall be 0. G Shall not be furnished as a stabilized steel. H Shall be furnished as a stabilized steel. BHSB,C 0. B For carbon levels less than or equal to 0. C For steels containing more than 0. D Shall be furnished as a stabilized steel. The minimum requirements only apply to the microalloy elements selected for strengthening of the steel.
Coating Properties monly fabricated by cold bending. There are many interrelated 8. These factors include thickness, ments as shown in Table 1 for the specific coating designation, strength level, degree of restraint, relationship to rolling or direction, chemistry, and base metal microstructure. The table 8. SHS 26 26 43 SHS B For sheet thickness of 0.
C For sheet thickness of 0. D As there is no discontinuous yield curve, the yield strength should be taken as the stress at 0. E SS Grade 80 [] Class 2 may exhibit different forming characteristics than Class 1, due to difference in chemistry.
F The purchaser should consult with the producer when ordering SS Grade 80 [] Class 3 material in sheet thicknesses 0. G If a higher tensile strength is required, the user should consult the producer. They are intended solely to provide the purchaser with as much information as possible to make an informed decision on the steel to be specified.
Values outside of these ranges are to be expected. The purchaser may negotiate with the supplier if a specific range or a more restrictive range is required for the application. B These typical mechanical properties apply to the full range of steel sheet thicknesses. The yield strength tends to increase and some of the formability values tend to decrease as the sheet thickness decreases. E No typical mechanical properties have been established. Discussion following 3.
Retests and Disposition of Non-Conforming Material 8. These notes and footnotes, excluding those in tables and gures, shall not be considered as requirements of this specication. It is the responsibility of the user of this standard to establish appro- priate safety and health practices and determine the applica- bility of regulatory limitations prior to use.
Referenced Documents 2. Terminology 3. Current edition approved Oct. Published November Minimized spangle is normally produced in coating designations G90 [Z] and lighter. Because of the many variables and changing conditions that are characteristic of continuous hot-dip coating lines, the zinc or zinc-iron alloy coating is not always evenly divided between the two surfaces of a coated sheet; nor is it always evenly distributed from edge to edge.
B As it is an established fact that the atmospheric corrosion resistance of zinc or zinc-iron alloy-coated sheet products is a direct function of coating thickness weight mass , the selection of thinner lighter coating designations will result in almost linearly reduced corrosion performance of the coating.
For example, heavier galvanized coatings perform adequately in bold atmospheric exposure whereas the lighter coatings are often further coated with paint or a similar barrier coating for increased corrosion resistance. D No minimum means that there are no established minimum requirements for triple- and single-spot tests. It is typically produced by subjecting the hot-dip zinc-coated steel sheet to a thermal treatment after it emerges from the molten zinc bath.
This type of coating is suitable for immediate painting without further treatment except normal cleaning refer to Guide D The lack of ductility of the alloy coating presents a potential for powdering, etc. Classication 4.
Structural Steel Grade 50 [] is available in three classes based on tensile strength. Ordering Information 5. The thickness of the sheet includes both the base metal and the coating. NOTE 2The purchaser should be aware that there are variations in manufacturing practices among the producers and therefore is advised to establish the producers standard or default procedures for thickness tolerances.
Chemical Composition 6. When the amount of copper, nickel, chromium, or molybdenum is less than 0. When the amount of vanadium, titanium, or columbium is less than 0.
NOTE 3To control alloy formation and promote adhesion of the zinc coating with the steel base metal, the molten coating metal composition normally contains a percentage of aluminum usually in the range from 0.
This aluminum is purposely supplied to the molten coating bath, either as a specied ingredient in the zinc spelter or by the addition of a master alloy containing aluminum. Mechanical Properties 7. These mechanical property values are nonmandatory. They are intended solely to provide the purchaser with as much information as possible to make an informed decision on the steel to be specied.
There are many interrelated factors that affect the ability of a 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 base metal microstructure. The table in Appendix X1 lists the suggested minimum inside radius for 90 cold bending for structural steel and high-strength low- alloy steel.
They presuppose hard way bending bend axis parallel to rolling direction and reasonably good shop forming practices.
Where possible, the use of larger radii or easy way bends are recommended for improved performance. Coating Properties 8.
0コメント