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But G has its own test procedures for the weakening of the base layer, A refers to the most complete guide of the ASTM A standard, which gives the details of a bending test.
Perhaps the most obvious and important difference between these standards is how relevant each one is in todays market. Also, A has no requirements as to the minimum coating thickness on threaded fasteners and items, but refers to ASTM A for these requirements. However, the information presented here can adequately describe some of the key differences between the two. The standard requires that the coating be free of imperfections such as bubbles, rough or uncoated areas, acid, black spots, or slag particles adhering to the coating The sampling procedure laid out in G for testing the coating thickness has some very general and relaxed guidelines.
However, there are some competing specifications that get attention when an end user asks a galvanizer to use them.
This may seem like a small difference in the syntax, but this difference can prove to be very important when there is overlap and similar areas are considered. January 29, Authored by Daniel Barlow. Both specifications ask for the use of a stout knife test to determine proper adherence of the coating.
The most significant difference here is with regard to the minimum coating thickness required by the A for pipes and tubes and for flats and bars.
A, on the other hand, only requires the average coating thickness measurement meet the minimum coating thickness required by Table 1, with the average of one specimen being one coating grade below that required in Table 1. ASTM A is listed as the standard for renovation by each specification.
Standards Council of Canada
This standard has lost its relevance in the market and is rarely used. It is important to be aware of these differences in the case where a manufacturer or prescriber requests information on CSA G It is considered the standard of the hot-dip galvanizing industry in North America.
However, G gives its own procedures for testing for embrittlement of the base coating while A references a complete guide of ASTM A which details a bend test. The practice behind each method varies from one specification to the other, but the most notable differences are the feeler gauge, magnetic and electronic measurements.
Differences Between ASTM A and… | American Galvanizer’s Association
The percentage by weight and the percentage by mass differ only in verbiage and describe the same amount. Both specifications also contain a slight difference with respect to the repair of uncoated areas during the galvanizing process.
Both specifications require the use of a knife test to determine proper coating adherence. ASTM A also declares, in addition to the 0. The framework of these two specifications, and therefore their goal, is almost identical. The higher purity required by G is the difference between the two specifications.
CSA CAN/CSA-G164-M92 – Hot Dip Galvanizing of Irregularly Shaped Articles
However, there are some competing specifications that are worthy of consideration when an end user requests that the galvanizer use them. Both tables are shown below to compare the minimum coating thicknesses specified by each. It is considered the csaa of the hot-dip galvanizing industry in North America.
However, the information presented here may adequately describe some of the major differences between the two. The first major difference between the two specifications is where Article 3.
The first major difference between the two specifications comes when section 3. Each standard lists the same tests used to determine the coating thickness on galvanized steel; electronic or magnetic gauge, weigh galvanize weigh, weigh strip weigh or microscopy methods. This leads to less confusion during the galvanizing process and creates a complete specification.
CAN/CSA-GM92 (R) | Standards Council of Canada – Conseil canadien des normes
The CSA G classifications are more general and include; cast, rolled, stretched, pressed and forged steel; screws, bolts, nuts, rivets, nails and similar fasteners. Again, these two specifications are similar, but have major differences; particularly with regard to the listed coating properties. Is the CSA G standard always a valid specification? Both tables are shown below to compare the minimum coating thicknesses specified by each one.
Some slightly different language exists between the two regarding piping and continuous galvanizing, but when read carefully, the same information is being stated in csz scope of each specification.
On the other hand, the A only requires that the average measurement of the thickness of the coating meet the minimum coating thickness required by Table 1, with the sample average having a coating less than that required in Table 1. This creates less confusion during the galvanizing process and a more complete specification. Recent reports have shown that much thicker coatings than these minimum cs are not feasible on these materials.
Both standards also cite that ASTM B6 is a standard that specifies that the zinc used in the galvanizing bath must be compliant. While this standard is similar to ASTM A in scope and purpose, there are many differences between the two.
The procedure includes the option to choose the number of samples depending on the number of parts in the lot and the length and size of the parts. Despite this, the G includes these materials with all other materials and requires inaccessible thicknesses for flats, bars, pipes, and tubes. New information and research are constantly taken into account when updates are made to ASTM A; the last update was in ASTM A also holds a few more requirements regarding the finish of the coating.
Despite this, G lumps this material in with all other materials and requires unattainable thicknesses for strip, bar, pipe, and tubing. Few conditions are given by G regarding the appearance of the zinc coating.
For, example, each specification uses a table to describe minimum coating thickness standards on galvanized steel, but the minimum requirements and materials listed are quite different. The material provided herein has been developed to provide accurate and authoritative information about after-fabrication hot-dip galvanized steel.
Few requirements are given by G concerning the appearance of the zinc coating. Both specifications also require that the exposed area cover less than 0.