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The two specifications also contain a minor difference regarding the renovation of areas left uncoated during the galvanizing process. Total average equal to the requirement for the minimum coating thickness with the thicknesses of all samples greater than a coating grade less 1g64 in Table 1.
Both standards also cite ASTM B6 as a standard to which the zinc used in the galvanizing bath must conform. It is considered the standard of the hot-dip t164 industry in North America.
Standards Council of Canada
Table 1 of ASTM A has requirements for structural shapes, strip and cxa, plate, g64 and tubing, wire, and reinforcing bar. Both standards also cite that ASTM B6 is a standard that specifies that the zinc used in the galvanizing bath must be compliant. Again, these two specifications are similar, but have some very important differences; especially in regards to the specified coating properties.
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 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.
CAN/CSA-GM92 (R) | Standards Council of Canada – Conseil canadien des normes
It is important to be aware of these differences in the case where a manufacturer or prescriber requests information on CSA G The framework of these two specifications, and therefore their goal, is almost identical. Table 1 of ASTM A has requirements for structural forms, strips and bars, plates, pipes and tubes, wires and rebar.
This standard has lost its relevance in the market and is rarely used. 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.
Differences Between ASTM A and… | American Galvanizer’s Association
This may seem like a csz difference in the syntax, but this difference can prove to be very important when there is overlap and similar areas are considered. However, there are some competing specifications that get attention when an end user asks a galvanizer to use them.
The sampling procedure set up in G to test the coating thickness has very general guidelines. 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. Most galvanizers located in North America use this specification as the standard for coating caa, appearance, finish and adherence.
Both tables are shown below to compare the minimum coating thicknesses specified by each one. The higher purity required by G creates the difference in the two specifications. Both specifications also require that the exposed area cover less than 0.
Anyone making use of this information assumes all liability arising from such use.
CSA CAN/CSA-G164-M92 – Hot Dip Galvanizing of Irregularly Shaped Articles
The information provided herein is not intended as a representation or warranty on the part of the AGA. January 29, Authored by Daniel Barlow.
ASTM A has a more realistic expectation that the coating be free of uncoated areas, bubbles, flux deposits, and matte.
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 Also, A has no requirements as to the minimum coating thickness on threaded fasteners and items, but refers to ASTM A for css requirements.
Each specification makes the coating thickness, finish, appearance and adherence of a hot-dip galvanized coating uniform.
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.
ASTM A is listed as the standard for repair for each specification. 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. This creates less confusion during the galvanizing process csx a more complete specification. Few conditions are given css G regarding the appearance of the zinc coating. 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.
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 cza the minimum coating thickness required by the A for pipes and tubes and for flats and g1644. Both specifications require that the exposed area be less than an inch in its narrowest dimension. ASTM A also declares, in addition to the 0.
It has lost relevancy in the market and is seldom used.
However, due to financial considerations, CSA G has not been updated since and there appears to be no intention to do so. New information and research are constantly taken into account when updates are made to ASTM A; the last update was in However, the information presented here may adequately describe some of the major differences between the two.
Also, A cda not give requirements for the minimum coating thickness on fasteners and threaded articles but references ASTM A for these requirements. Recent reports have shown that much thicker coatings than these minimum requirements are not feasible on these materials. The percentage by weight and the percentage by mass differ only in verbiage and describe the same amount. Both specifications require the use of a knife test to determine proper cea adherence.
The main difference here is the refusal to accept the presence of matte particles adhering to the coating, according to G 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.
The first major difference between the two specifications comes when section 3. Recent information has shown coatings much thicker than these minimum requirements are not attainable on these materials. Csz information and research are constantly being considered when updates are made to ASTM A; the last such update occurring in The first major difference between the two specifications is where Article 3.
However, the information presented here gg164 adequately describe some of the key differences between the two. Despite this, the G includes these materials with all other materials and requires inaccessible thicknesses for flats, bars, pipes, and cxa.