|
|
|
|
|
ABOUT |
|
■
History |
|
■
Present |
|
■
Future |
|
CAPABILITIES |
|
■
Steel Types |
|
■
Facilities |
|
■
Equipment |
|
■
Heat Treating |
|
■
Pattern Services |
|
INDUSTRIES |
|
■
Energy |
|
■
Construction |
|
■
General Industry |
|
■
Marine |
|
■
Specialty |
|
■
Transportation |
|
QUALITY |
|
■
ISO 9001:2000 |
|
■
PED |
|
■
Chemical Testing |
|
■
Non Destructive Testing |
|
■
Physical Testing |
|
■
Sand Testing |
|
■
Training & Certification |
|
NEWS |
|
■
Press Releases |
|
■
In the News |
|
■
Employee News |
|
CONTACT |
|
■
Sales |
|
INFORMATION |
|
■
Brochures |
|
■
Casting vs Forged |
|
■
Directions |
|
■
FAQ |
|
■
Making a Steel Casting |
|
■
Mission Statement |
|
HOME |
| |
|
|
|
 |
 |
|
|
| |
INFORMATION - CASTING vs FORGED |
|
| |
Benefits of purchasing steel castings
from Southwest Steel Casting
Company
verses the use of forged steel parts. |
|
|
|
| |
|
|
| |
WELDABILITY:
Steel castings tend to have better weldability
than steel forgings.
PART GEOMETRIES:
Steel castings lend themselves more
easily to complex shapes than do steel forgings.
CHEMICAL REQUIREMENTS:
Unique chemistries tend to be better (less
expensively produced) with steel castings. Also,
the class of steels commonly referred to as
“work-hardenable steels” (13% Mn) are not
forgeable, but are readily made in a casting.
MECHANICAL PROPERTIES:
Steel castings are ISOTROPIC -
meaning “similar properties in all directions”.
Steel forgings are ANISOTROPIC - meaning
“similar properties in the direction of flow’’.
Thus, in the direction of flow (material
deformation), a steel forging’s strength is
highest along its longitudinal axis, and
decreases in the transverse direction. Whereas,
in a steel casting, the properties are similar
in all directions.
CORROSION RESISTANCE:
In certain stainless steels, castings
tend to have better corrosion resistance than
equivalent forgings this is due to controlled
amounts of ferrite present in castings.
WEIGHT:
Steel castings are almost always
lighter their forged counterparts “redesign from
forgings to castings usually results in
substantial savings in weight”. For example - a
forged cannon muzzle brake weighed 600 lbs; this
same part as a casting weighed 400 lbs. (and
lasted over three times longer). |
|
| |
|
|
| |
STEEL CASTINGS WILL TEND TO HAVE THE ADVANTAGE
OVER EQUIVALENT STEEL FORGINGS WHEN ANY OF THE
FOLLOWING INSTANCES OCCUR:
► An unusual chemistry is
required (i.e., a chemistry other than that
which
is the norm for steel
mills)
► The part being
considered is relatively large or has complex
geometry.
► Stresses to be applied to the
part are multi-axial.
► The material call-out is
for a high manganese (approximately 13%),
work-hardenable steel.
► Minimal set-up and tooling
costs are a factor. |
|
| |
|
|
| |
“CASTINGS vs FORGINGS -
A REALISTIC EVALUATION”, Malcolm
Blair, Raymond
Monroe, SFSA
“STEEL CASTINGS
HANDBOOK”, 5th Edition, SFSA
“FORGING HANDBOOK”,
Forging Industry Association, ASM
“WELDABILITY of CAST
STEELS”, Literature Review, SFSA
Special Report # 21 |
|
|
|
|
|
