stainless steel Flashcards

1
Q

stainless steels

A

ALWAYS MORE THAN 10% chromium

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2
Q

plain carbon steels 4

A

dead mild, mild, medium carbon, tools and steels

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3
Q

low alloy steel

A

small amts of other added elements

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4
Q

high alloy steel

A

high amt of added elements
eg stainless

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5
Q

ferritic

A
  • BCC
  • less than 0.02% carbon
    11-27 chronium
  • good strength + moderate ductility
  • can be welded
    nuts bolts screws
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6
Q

martensitic

A

0.15-1.2 carbon
11.5-18 chronium
quenched and tempered to produce high hardness and tensile strength
less corrosion resistance
turbine blades, surgical instruments

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7
Q

austenitic

A

addition of nickel >6%
<0.25 % carbon
16-26 chronium
good durability, formability and corrosion resistance
non magnetic
cookware etc

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8
Q

dupplex

A

chronium 22% more
good strength
high toughness and ductility
dual phase structure of ferrite and austenite

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9
Q

precipitation hardening

A

similar composition to austenitic but addition of aluminium, niobium or tantalum

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