304
provides good resistance to corrosion in welded construction where
subsequent heat treatments are not practicable.
| Chemical Analysis |
| C |
.08 |
| Mn |
2.00
max |
| P |
.040
max |
| S |
.030
max |
| Si |
1.0
max |
| Cr |
18.00/20.00 |
| Ni |
8.00/10.50 |
| Cu |
.75
max |
| Mo |
.75
max |
Used
where corrosion resistance and good mechanical properties are primary
requirements. These grades
are widely accepted in such industries as dairy, beverage. And other food
products where the highest degree of sanitation and cleanliness is of
prime importance. Parts for handling acetic, nitric, and citric acids, organic
and inorganic chemicals, dyestuffs, crude and refined oils are fabricated
from this material. Because
of its lack of magnetism it is highly desirable for instruments. It is also widely used for architectural trim.
| Tensile
Strength |
90000 |
| Yield
Strength |
40000 |
| Elongation
in 2” |
50% |
| Rockwell
“B” Hardness |
85 |
Type
304 has a machinability rating of approximately 45% with 1212 rated at
100%. Surface cutting speed on automatic screw machines is
approximately 75’ per minute.
Easily welded by all the commercial processes except forge or hammer welding. The resulting weld has good toughness and ductility. Annealing is recommended after welding to maintain maximum corrosion resistance.
Forge between 2100° F and 2350° F. Do not forge below 1700° F.
Annealing range is between 1850° and 2050° F. Cool rapidly. Water should be used for heavier sections; air for lighter sections. The stress relieving range is between 400° and 700° F.
Please
note: Technical data is compiled from various sources and is for
reference only and not intended for design purposes. Tennessee Die Supply Co., Inc.
makes no claim as to the accuracy to the data contained in this web site. Tennessee Die Supply Co., Inc.'s liability will only be
the replacement cost of the steel.