PENGARUH TEMPERATUR TERHADAP SIFAT MEKANIK PADA BAJA KARBON SEDANG ST 60

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Lagiyono .
Suwandono .
Mukhamad Masykur

Abstract

Medium carbon fertilizer ST 60 in general is often used in construction of
building materials and a variety of fields. Society prefers medium carbon
fertilizer because this material is more easily available and relatively
affordable  prices, and also the strength and tenacity are sufficient.
Temperature significantly affects the mechanical properties of carbon steel is
ST 60.  Formulating of the problem in this study is to determine how the
mechanical properties of medium carbon steel ST 60 to temperature 0
0
C,
26
0
C, 50
0
C, 100
0
C. The purpose of this research to know how much testing on
tensile strength, hardness, and price impact. The results of research on testing
with 0
0
C yield of 696,68 N/mm
2
tensile test, hardness test of 201,00 HB, the
impact test produces 30,35 J/cm
2
. In the test with a temperature of 26
0
C
produced by 694,47 N/mm
2
tensile test, hardness test of 200,11 HB, the
impact test at 24,52 J/cm
2
. In the test with a temperature of 50
0
C produced by
685,87 N/mm
2
tensile test, hardness test of 198,00 HB, the impact test at 41,70
J/cm
2
. In the test with a temperature of 100
0
C resulted N/mm
2
tensile test at
672,89 N/mm
2
, the hardness  of 195,56 HB, the impact test at 37,69 J/cm
2
.
Data analysis in this study using the product moment correlation test and t-test.  The conclusion of this research is that there is a negative relationship
between temperature with mechanical properties which means the higher the
temperature the more down the value of tensile strength, hardness, and the
price impact.
Keywords: fertilizer, mechanical, temperature.

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