stainless steel

Question 1

stainless steels

Answer 1

ALWAYS MORE THAN 10% chromium

Question 2

plain carbon steels 4

Answer 2

dead mild, mild, medium carbon, tools and steels

Question 3

low alloy steel

Answer 3

small amts of other added elements

Question 4

high alloy steel

Answer 4

high amt of added elements
eg stainless

Question 5

ferritic

Answer 5

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

Question 6

martensitic

Answer 6

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

Question 7

austenitic

Answer 7

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

Question 8

dupplex

Answer 8

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

Question 9

precipitation hardening

Answer 9

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