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27 Cards in this Set
- Front
- Back
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FCC iron with carbon dissolved in it |
Austenite |
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% of carbon for pearlite to form |
0.8% |
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Steel below 720°C has a layered 2 phase structure of |
Ferrite and cementite |
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Steel produced when no deoxidants Added |
Rimmed |
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Sheet steel and electrode rods made from what type of steel ingots |
Rimmed |
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Hard needle like structures in iron |
Martensite |
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Heat treatment process after hardening to reduce brittleness |
Tempering |
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Process of softening metal |
Annealing |
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Process for full annealing |
Heat to 20-40°c above critical temp (720°C) for 1 hour for each 1" of thickness |
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Used to make grain structure uniform. Heated to 40°C over critical temp of steel (720°c) |
Normalizing |
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Property that enables metal to resist deformation under load |
Strength |
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Ability of metal to resist sudden applied loads. Measured in ft/lbs force |
Impact strength |
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3 Methods of hardness testing |
Rockwell, Vickers, brinell |
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Most frequently used hardness test |
Rockwell |
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Most frequently used hardness test |
Rockwell |
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How to test with Rockwell method |
Use a diamond tip to indent the metal and a Rockwell number used to determine hardness |
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Rockwell method used for ferrous metals |
Diamond tip to indent, Rockwell C numbers |
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Rockwell method for softer non ferrous metals |
Rockwell B, metal ball to indent |
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Ability of metal to deform permanently without breaking |
Plasticity |
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Opposite of plasticity |
Brittleness |
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Minimum preheat thickness |
3/4" |
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Preheat for 3/4"-1 1/2" thick A36 steel |
50°F |
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Temperature range for tempering structural steel |
590-650°C |
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CSA type G |
General construction steel |
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CSA type W |
Weldable steel for general construction |
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CSA type T |
Weldable and low temp steel |
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CSA type R |
Atmospheric corrosion resistance steel 4x greater than carbon steel |
