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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 This standard has lost its relevance in the market and is rarely used. ASTM A also declares, in addition to the 0.

Corbec news on hot-dip galvanizing of steel

It has lost relevancy in the market and is seldom used. However, there are some competing specifications that get attention when an end user asks a galvanizer to use them. Most galvanizers located in North America use this specification as the standard for coating thickness, appearance, finish and adherence.

It is important to be aware of these differences in the case where a manufacturer or prescriber requests information on CSA G Despite this, G lumps this material in with all other materials and requires unattainable thicknesses for strip, bar, pipe, and tubing. Again, these two specifications are similar, but have some very important differences; especially in regards to the specified coating properties. Lets examine some important differences between the two specifications, and then summarize with a comparison table.

The information provided herein is not intended as a representation or warranty on the part of the AGA. 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.

Standards Council of Canada

Both tables are shown below to compare the minimum coating thicknesses specified by each one. For example, each specification uses a table to describe the standards for minimum coating thickness of galvanized steel, but the minimum requirements and the materials listed are very different. The main difference here is the refusal to accept the presence of matte particles adhering to the coating, according to G Both specifications also require the bare spot to be less than 0.


However, G cas 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.

CAN/CSA-GM92 (R) | Standards Council of Canada – Conseil canadien des normes

Some differences exist between the two with regard to piping and continuous galvanizing, but after examination, the t164 information is indicated within each specification. The framework of these two specifications, and therefore their goal, is almost identical.

This material provides general information only and is not intended as a substitute for competent professional examination and verification as to suitability and applicability. The first major difference between the two specifications comes when section 3. But due to financial considerations, CSA G has not been updated since and there seem to be no plans to do so. Some slightly different language exists between the two regarding piping and continuous galvanizing, but when read carefully, the same information is being stated in the scope of each specification.

Both tables are shown below to compare the minimum coating thicknesses specified by each. The most notable difference here is in regard to the minimum coating thickness required by A for pipe and tubing as well as for strip and bar. ASTM A is listed as the standard for repair for each specification.

The first major difference between the two specifications is where Article 3. 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. Also, A has no requirements as to the minimum coating thickness on threaded fasteners and items, but refers to ASTM A for these requirements.

This creates less confusion during the galvanizing process and csx more complete specification. G1164 standards also cite that ASTM B6 is a standard that specifies that the zinc used in the galvanizing bath must be compliant. Each specification 1g64 the coating thicknessfinish, appearance, and adherence of a hot-dip galvanized coating. Both specifications ask for the use of a stout knife test to determine proper adherence of the coating.


The two specifications also contain a minor difference regarding the renovation of areas left uncoated during the galvanizing process. New information and research are constantly taken into account when updates are made to ASTM A; the last update was in ASTM A has a more realistic expectation that the coating be free of uncoated areas, bubbles, flux deposits, and matte.

However, the information presented here may adequately describe some of the major differences between the two. 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.

The scope of these two specifications, and therefore their intended purpose, are nearly identical. The sampling procedure g1164 out in G for testing the coating thickness has some very general and relaxed guidelines.

January 29, Authored by Daniel Barlow. It is considered the standard of the hot-dip galvanizing industry in North America. Both specifications require the use of a knife test to y164 proper coating adherence. The CSA G classifications are more general and include; cast, rolled, stretched, pressed and forged steel; screws, bolts, nuts, rivets, nails and similar fasteners. The sampling procedure set up in G to test the coating thickness has very general guidelines. Table 1 of ASTM A has requirements for structural forms, strips and bars, plates, pipes and tubes, wires and rebar.

Differences Between ASTM A123 and CSA G164

For, example, each specification uses a table to describe minimum coating thickness standards on f164 steel, but the minimum requirements and materials listed are quite different. The higher purity required by G is the difference between the two specifications. Each specification makes the coating thickness, finish, appearance and adherence of a hot-dip galvanized coating uniform.

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