Changde galvanized pipe manufacturer, galvanized pipe spot price trend

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various models and specifications are complete, and can also be customized according to customer requirements
rb galvanized pipe
The mechanical properties of steel are important to ensure the final performance (mechanical properties) of steel Index, which depends on the chemical composition of the steel and the heat treatment system. In steel pipe standards, tensile properties (tensile strength, yield strength or yield point, elongation), hardness and toughness indicators are specified according to different usage requirements, as well as high and low temperature properties required by users.

rb ① Tensile strength (
rb
)
rb The maximum force that the sample bears when breaking during the stretching process (
b), the stress (
) obtained by the original
cross-sectional area
(
) of the sample is called the tensile strength (
rb
), the unit is
/
(
). It represents the maximum ability of a metal material to resist damage under tension. The calculation formula is
rb where
b is the maximum force that the sample bears when it is broken,
(
Newton
)
the original cross-section of the sample Area,
.
rb ② Yield point (
)
rb For metal materials with yield phenomenon, the stress when the sample can continue to elongate without increasing the force (remaining constant) during the stretching process is called Yield point. If the force decreases, the upper and lower yield points should be distinguished. The unit of yield point is
/ (
).
rb Upper yield point (
): The maximum stress before the specimen yields and the force decreases for the first time (
): The minimum stress in the yield stage when the initial transient effect is not considered .
rb The calculation formula of yield point is
rb where
Yield force (constant) during the tensile process of the sample,
(Newton)
Original cross-section of the sample Area,
.
rb ③ Elongation after break (
)
rb In the
tensile test
, the length increased by the gauge length of the sample after it is broken is the same as the original gauge length. The percentage of length is called elongation. Represented by
, the unit is
. The calculation formula is
rb where
the gauge length of the sample after breaking,
the original gauge length of the sample,
.
rb ④ Reduction of area (
)
rb In the tensile test, the maximum reduction in the cross-sectional area at the reduced diameter after the specimen is broken is the percentage of the original cross-sectional area, which is called is the area shrinkage. Represented by
, the unit is
. The calculation formula is as follows
rb where
the original cross-sectional area of the sample,
the minimum cross-sectional area at the reduced diameter after the sample is broken,
.
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