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1. Product Characteristics
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| Free-cutting elements such as
sulfur, lead, and bismuth are added to free-cutting steel
to facilitate the cutting process.
Since lead free-cutting steel is being regulated for
emitting lead fumes that cause harm to human body, we at POSCO have
developed new bismuth free-cutting steel since 1995 and
the mass production is currently underway. |
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2. Product Status
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Product
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Standard
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Available Sizes
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Usage
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Wire Rod
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POSCUT1A
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5.5~42 mm
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Automobile nuts, shafts in office
automation equipment, oil or air joint parts |
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* POSCUTIA: POSco free CUTting steel 1A grade
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3. Quality Characteristics
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The heat (400~1200°C) generated from friction
of tools and material melts bismuth elements in steel.
The melted bismuth works as a lubricant when cutting,
extending the tool lifespan. In addition, the non-metallic
inclusion (MnS) in steel improves cutting and chip breaking
capability by taking on the cutting stress on itself.
This results in a smooth surface finish and enables high-speed
processing, facility automation, and high-precision processing. |
4. Processing Quality
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Standard
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Free Cutting
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Tool Life Span
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Chip Breakage
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Remark
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Bi
Free Cutting Steel (POSCUT1A)
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95 %
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4~5,000 pieces
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Cut short
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Under the processing
condition of 24 mm shell and high-speed tool usage
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Pb
Free Cutting Steel (SUM24L)
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100 %
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4~5,000 pieces
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Cut short
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Remark
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Similar
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Same
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Similar
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