JIS G 3463-1994 Mechanical properties of stainless steel tubes for boilers and heat exchangers

properties of steel 565 14/06/2023 1078 Lila

JIS G3463-1994 Stainless Steel Tubes for Boiler and Heat Exchanger JIS G3463-1994 is a Japanese Industrial Standard that defines the mechanical properties of stainless steel tubes used for boilers and heat exchangers. The standard covers the requirements for three grade series, including grade SU......

JIS G3463-1994 Stainless Steel Tubes for Boiler and Heat Exchanger

JIS G3463-1994 is a Japanese Industrial Standard that defines the mechanical properties of stainless steel tubes used for boilers and heat exchangers. The standard covers the requirements for three grade series, including grade SUS304T, SUS316T and SUS444T. This standard applies to stainless steel tubes with an outer diameter of 12.7 mm or more for high pressure boilers, and to stainless steel tubes with an outer diameter of 8.0 mm or more for low pressure boilers and heat exchangers.

The mechanical properties of the three grades defined by JIS G3463-1994 follow the values ​​defined in the Japanese Industrial Standard JIS G3448-1994. The mechanical properties of JIS G3448-1994 are defined as follows: tensile strength (N/mm2), yield stress/proof stress (N/mm2), elongation (% in 50mm length) and hardness (HB).

The mechanical properties given in the JIS G3463-1994 standard not only apply to seamless tubes but also to welded and welded-and-drawn (cold finished) tubes. The material covered by this standard is austenitic stainless steel, which does not cover ferritic stainless steel, martensitic stainless steel, precipitation hardening stainless steel, or other non-austenitic stainless steels.

For grades SUS304T, SUS316T and SUS444T, the mechanically tested parts shall be prepared from full length tubes. The test samples shall be taken from the center of the test part in the direction of the axis of the tube and shall not be more than 50 mm in length. The tests shall be conducted at room temperature, and at temperatures up to 600°C, where applicable, for corrosion-resistant stainless steels.

JIS G3463-1994 includes requirements for tolerance, allowable deviations and straightness of stainless steel tubes. The allowable outer diameter and wall thickness deviations shall not exceed ± 5% of the specified dimensions. The tolerance of the length of the components shall not exceed ± 2.5 mm, and the allowance of the out-of-straightness shall not exceed ± 0.3% of the length.

In conclusion, JIS G3463-1994 is a Japanese industrial standard that defines the mechanical properties of austenitic stainless steel tubes for boilers, heat exchangers and pressure vessels. This standard specifies the requirements for three grade series, SUS304T, SUS316T and SUS444T. The mechanical properties defined in the standard apply to seamless, welded and welded-and-drawn (cold finished) tubes. It also defines the allowable deviations in the outer diameter and wall thickness, as well as the tolerance and straightness of the stainless steel tubes.

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properties of steel 565 2023-06-14 1078 EchoGlow

JIS G 3463-1994 is a Japanese Industrial Standard that specifies the mechanical properties of stainless steel tubes used for boilers and heat exchangers. This standard defines the strength of the steel, its elongation, hardness, and impact resistance. It also defines requirements regarding corrosi......

JIS G 3463-1994 is a Japanese Industrial Standard that specifies the mechanical properties of stainless steel tubes used for boilers and heat exchangers. This standard defines the strength of the steel, its elongation, hardness, and impact resistance. It also defines requirements regarding corrosion, thermal properties, and surface finish.

The standard is intended for use in the manufacturing of pipes and tubes for the transport of steam or high-temperature liquids. It is designed for both welded and seamless pipes, and covers grades of type 316 and 316L stainless steel. These grades are highly durable and have high resistance to corrosion, due to its high chromium, molybdenum, and nitrogen content. Grade 316 also has a high resistance to stress corrosion cracking.

The standard defines the mechanical properties of the steel by specifying the ultimate tensile strength, yield strength, and elongation for a given pipe size. The ultimate tensile strength is the maximum amount of stress a material can withstand before it fails. The yield strength is the amount of stress at which it starts to deform plastically, while the elongation is the amount of deformation per unit length resulting from an applied force.

The maximum hardness is also specified by the standard. This is the maximum level of hardness that can be expected when measuring the hardness with a Rockwell hardness testing machine. It is important to note that this test should be conducted in the annealed condition, which is when it has the maximum ductility or flexibility.

The standard also provides guidelines regarding the impact resistance, corrosion resistance, and thermal properties. The corrosion resistance is determined through tests that indicate how long a material will last in a corrosive environment. Thermal properties are determined by measuring the thermal expansion and thermal shock resistance, and impact resistance is determined through Charpy impact tests that measure the energy required to break a sample specimen.

These requirements, when fulfilled, guarantee that pipes made from stainless steel according to JIS G 3463-1994 are of the highest quality. These pipes are highly durable, corrosion-resistant and have good mechanical properties, making them ideal for use in boilers and heat exchangers.

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