MMET 207 EXAM QUESTIONS WITH
CORRECT ANSWERS
free machining - Answer-steels with additions of sulfur, lead, selenium, or other
elements in sufficient quantity that they machine more easily than untreated grades
drawing quality - Answer-hot- or cold-rolled steel, specially produced or selected to
satisfy the elongation requirements of deep drawing operations
merchant quality - Answer-steels with an M suffix on the designation intended for non-
structural applications; low quality material
commercial quality - Answer-steels produced from standard rimmed, capped, concast or
semikilled steel. These steels may have significant segregation and variation in
composition, and the are not made to guaranteed mechanical property requirements;
most widely used grade
H Steel - Answer-Steels identified by an H suffix on the designation and made to a
guaranteed ability to harden to a certain depth in heat treatment
B Steels - Answer-Steels with small Boron additions as a hardening agent, there are
identified by a B inserted between the first two and last two digits in the four-digit
identification number (xx B xx)
Pickling - Answer-use of acids to remove oxides and scale on hot-worked steels
Temper Rolling - Answer-Many steels will exhibit objectionable strain lines when drawn
or formed. Temper rolling involves a small amount of roll reduction as a final
p=operation on annealed material to eliminate stretcher strains. This process
sometimes is used to improve the surface finish on a steel product
Temper - Answer-the amount of cold reduction in a rolled sheet and strip
E steels - Answer-Steels with an E prefix on the designation are melted by electric
furnace
nonmetallic inclusions - Answer-oxides, silicates, sulfides, or aluminas that form during
conventional melting and refining
ingot - Answer-a cast shape that will undergo further finishing
How are ingots made? - Answer-Molten steel is poured into casts which solidifies and
will be rolled further into other shapes
, integrated mill - Answer-is one that has at least one blast furnace, a coke plant, and
various steel-refining processes that makes a number of product lines
minimills - Answer-only have one production line, usually convert scrap in a basic
oxygen or electric arc furnace
What are the semi-finished forms of steel? - Answer-billets, blooms, slabs
Billets make - Answer-bars, rod, tube rounds
Blooms make - Answer-tube rounds, structural shapes, rails
slabs make - Answer-skelp, plates
What are the five mechanical properties? - Answer-strength, formability, stiffness,
toughness, durability
What categories fall under strength? - Answer-tensile, yield, compression, flexural,
shear, creep, stress rupture
What categories fall under formability? - Answer-% elongation, % reduction in area,
bend radius
What categories fall under stiffness? - Answer-Modulus of elasticity, flexural modulus,
shear modulus
What categories fall under toughness? - Answer-impact strength, notch sensitivity,
critical stress intensity factor
What categories fall under durability? - Answer-Hardness, wear resistance, fatigue
strength
What is the 0.2% offset yield and how is it found? - Answer-It is 0.2% on the x axis
(strain), followed parallel to the modulus of elasticity.
It is used to settle any dispute between where the proportional limit ends/where the yield
strength is
What is coke used for? - Answer-used to reduce gas and iron oxide
What is limestone used for? - Answer-Limestone is used for removing impurities in iron
ore in the blast furnace; is used as a flux/slag material
How much carbon does pig iron have? - Answer-5-6%
CORRECT ANSWERS
free machining - Answer-steels with additions of sulfur, lead, selenium, or other
elements in sufficient quantity that they machine more easily than untreated grades
drawing quality - Answer-hot- or cold-rolled steel, specially produced or selected to
satisfy the elongation requirements of deep drawing operations
merchant quality - Answer-steels with an M suffix on the designation intended for non-
structural applications; low quality material
commercial quality - Answer-steels produced from standard rimmed, capped, concast or
semikilled steel. These steels may have significant segregation and variation in
composition, and the are not made to guaranteed mechanical property requirements;
most widely used grade
H Steel - Answer-Steels identified by an H suffix on the designation and made to a
guaranteed ability to harden to a certain depth in heat treatment
B Steels - Answer-Steels with small Boron additions as a hardening agent, there are
identified by a B inserted between the first two and last two digits in the four-digit
identification number (xx B xx)
Pickling - Answer-use of acids to remove oxides and scale on hot-worked steels
Temper Rolling - Answer-Many steels will exhibit objectionable strain lines when drawn
or formed. Temper rolling involves a small amount of roll reduction as a final
p=operation on annealed material to eliminate stretcher strains. This process
sometimes is used to improve the surface finish on a steel product
Temper - Answer-the amount of cold reduction in a rolled sheet and strip
E steels - Answer-Steels with an E prefix on the designation are melted by electric
furnace
nonmetallic inclusions - Answer-oxides, silicates, sulfides, or aluminas that form during
conventional melting and refining
ingot - Answer-a cast shape that will undergo further finishing
How are ingots made? - Answer-Molten steel is poured into casts which solidifies and
will be rolled further into other shapes
, integrated mill - Answer-is one that has at least one blast furnace, a coke plant, and
various steel-refining processes that makes a number of product lines
minimills - Answer-only have one production line, usually convert scrap in a basic
oxygen or electric arc furnace
What are the semi-finished forms of steel? - Answer-billets, blooms, slabs
Billets make - Answer-bars, rod, tube rounds
Blooms make - Answer-tube rounds, structural shapes, rails
slabs make - Answer-skelp, plates
What are the five mechanical properties? - Answer-strength, formability, stiffness,
toughness, durability
What categories fall under strength? - Answer-tensile, yield, compression, flexural,
shear, creep, stress rupture
What categories fall under formability? - Answer-% elongation, % reduction in area,
bend radius
What categories fall under stiffness? - Answer-Modulus of elasticity, flexural modulus,
shear modulus
What categories fall under toughness? - Answer-impact strength, notch sensitivity,
critical stress intensity factor
What categories fall under durability? - Answer-Hardness, wear resistance, fatigue
strength
What is the 0.2% offset yield and how is it found? - Answer-It is 0.2% on the x axis
(strain), followed parallel to the modulus of elasticity.
It is used to settle any dispute between where the proportional limit ends/where the yield
strength is
What is coke used for? - Answer-used to reduce gas and iron oxide
What is limestone used for? - Answer-Limestone is used for removing impurities in iron
ore in the blast furnace; is used as a flux/slag material
How much carbon does pig iron have? - Answer-5-6%
