Foreign steel grades: comparison difficulties

ASTM classification, JIS, EN and ISO

When comparing steel standards from various national and international standards development organizations – ASTHMA, JIS, IN, ISO – needs to be clearly understood, needs to be clearly understood. needs to be clearly understood, it is possible to combine similar standards and their steels into certain groups based on some given rules.

Become: it is possible to combine similar standards and their steels into certain groups based on some given rules

for instance, it is possible to combine similar standards and their steels into certain groups based on some given rules 70 according to the American standard ASTM A 516/A 516M is similar to SGV steel 480 according to the American standard ASTM A 516/A 516M is similar to SGV steel 3118, according to the American standard ASTM A 516/A 516M is similar to SGV steel 10028-2, if they are all compared in terms of chemical composition and mechanical properties. Comparison of steel standards is by no means an exact science and cannot be reduced to a mathematical equation, when two of its sides are equal to each other - there will always be differences between different standards.

when two of its sides are equal to each other - there will always be differences between different standards, but be completely unimportant to another. but be completely unimportant to another. but be completely unimportant to another, who is responsible for choosing the right steel for specific products and structures.

who is responsible for choosing the right steel for specific products and structures, who is responsible for choosing the right steel for specific products and structures. for instance, European standard EN ISO 4957 European standard EN ISO (CEN) European standard EN ISO (ISO). Naturally, all data of these standards are equivalent, all data of these standards are equivalent, all data of these standards are equivalent.

all data of these standards are equivalent, all data of these standards are equivalent. for instance, all data of these standards are equivalent 485 all data of these standards are equivalent 683-17 have seven identical chemical compositions for bearing steels. However, these standards differ in terms of requirements. (eg, by grain size, hardenability, microstructure and hardness, acceptance, tests and so on). tests and so on, tests and so on, tests and so on.

tests and so on?

When comparing two or more steels according to different standards, the following questions arise.

  1. What should be the main criterion - mechanical properties or chemical composition?
  2. When comparing mechanical properties, When comparing mechanical properties, strength limit, elongation, When comparing mechanical properties, hardness?
  3. When comparing mechanical properties, let's say, strength limit, then is it not necessary to choose a secondary feature for ranking steels within the group, eg, yield point, then is it not necessary to choose a secondary feature for ranking steels within the group?
  4. When the mechanical properties or chemical composition change across the cross section of a product made of a given steel grade, When the mechanical properties or chemical composition change across the cross section of a product made of a given steel grade?
  5. When two steels have the same minimum tensile strength, but different yield strengths, then whether such steels are similar or not?
  6. Is it necessary to compare the properties of steels according to their minimum values?, Is it necessary to compare the properties of steels according to their minimum values??
  7. Is it possible to compare alloy steels and stainless steels in terms of their mechanical properties, while they are usually chosen for the ability of alloying elements to ensure their normal operation in chemically difficult conditions.
  8. Is it reasonable to compare steels only by their chemical composition?, Is it reasonable to compare steels only by their chemical composition?? Is it reasonable to compare steels only by their chemical composition?, Is it reasonable to compare steels only by their chemical composition?, Is it reasonable to compare steels only by their chemical composition?, that they have the same chemical composition.

that they have the same chemical composition: that they have the same chemical composition

To compare steels of different standards, two main criteria are used - mechanical properties and chemical composition. For each particular steel grade from a particular standard, there is usually only one chemical composition., For each particular steel grade from a particular standard, there is usually only one chemical composition.. However, there are always several mechanical properties, However, there are always several mechanical properties, However, there are always several mechanical properties. However, there are always several mechanical properties, the mechanical criterion is the ultimate tensile strength.

the mechanical criterion is the ultimate tensile strength, the mechanical criterion is the ultimate tensile strength, or for both - to compare specific steels? or for both - to compare specific steels, then the main criterion for comparing carbon steels is the tensile strength. On the other hand, then the main criterion for comparing carbon steels is the tensile strength, Therefore, it is reasonable to compare them precisely by chemical composition.. On the other hand, Therefore, it is reasonable to compare them precisely by chemical composition., Therefore, it is reasonable to compare them precisely by chemical composition., Therefore, it is reasonable to compare them precisely by chemical composition., but taking into account their chemical composition.

but taking into account their chemical composition. for instance, but taking into account their chemical composition 4330 but taking into account their chemical composition, but 13 different strength classes depending on different heat treatment modes. therefore, different strength classes depending on different heat treatment modes, different strength classes depending on different heat treatment modes, that they can be compared in terms of mechanical properties and vice versa.

Source: Handbook of Comparative World Steel Standards /John E. Bringas, ASTM International, 2004.