We would like to introduce ourselves to you as one of the
leading stockiest, suppliers and dealers of raw materials of
ferrous and non- ferrous metals such as :-
Stainless steel : sheets, plates, tubes, pipes, rods, wires,strips,
angles and pipe fittings like ball valves elbow, bends, studend,
tees, flanges, reducer in the grade AISI,304,304L,316,316L,310,321,410&420
etc.
Non _ ferrous :copper, brass, aluminum, phosphor bronze, gun
metals, lead, zinc, tin metals, titanium, nickel, monel, inconel,
600/800, hastelloy, in all shapes and sizes.
Ss fittings: butt welded/socket welded as per ASTM A – 403,
WPS A – 182,A – 105, A – 234 WPB.
We are the regular supplier of the above items to the public
and private sector, industries, power projects, sugar factories,
fertilizers plant, govt. Department at the most competitive
rates.
We also request you to register our name in approved vendors
list and also send us your valued enquires as and when you
are in need of the same. Hearing from you we shall submitting
our lowest and most competitive rates to you.
We hope this booklet be helpful to you to know about the product.
If you require any more information or clarification please
freely write to us so that we can furnish the same at your
end.
STAINLESS STEEL
stainless steel is defined as a steel alloy with
a minimum of 10% chromium content
by mass. Stainless steel does not stain, corrode, or rust as
easily as ordinary steel (it stains less), but it is not stain-proof.
It is also called corrosion-resistant steel or CRES when the
alloy type and grade are not detailed, particularly in the
aviation industry. There are different grades and surface finishes
of stainless steel to suit the environment to which the material
will be subjected in its lifetime.
APPLICATIONS:
Stainless steel’s resistance to corrosion and
staining, low maintenance, relatively low cost, and familiar
luster make it an ideal base material for a host of commercial
applications. There are over 150 grades of stainless steel,
of which fifteen are most common. The alloy is milled into
coils, sheets, plates, bars, wire, and tubing to be used in cookware, cutlery, hardware, surgical
instruments, major appliances,
industrial equipment, and as an automotive and aerospace structural
alloy and construction material in large buildings. Orange
juice and other food transport and storage tankers are
often made of stainless steel, due to its corrosion resistance
and antibacterial properties.
This also influences its use in commercial catering kitchens
and food processing plants, as it can be steam cleaned, sterilized,
and does not need painting or application of other surface
finishes.
Stainless steel is also used for jewellery and watches. The
most common stainless steel alloy used for this is 316L. It
can be re-finished by any jeweller and will not oxidize or
turn black.
Uses in sculpture, building facades and building structures.
RECYCLING & REUSE
Stainless steel is 100% recyclable.
In fact, an average stainless steel object is composed of about
60% recycled material, 25% originating from end-of-life products
and 35% coming from manufacturing processes
STAINLESS STEEL GRADES
1. 100 Series—austenitic chromium-nickel-manganese alloys
2. Type 101—austenitic that is hardenable through cold working
for furniture
3. Type 102—austenitic general purpose stainless steel working
for furniture
200 Series—austenitic chromium-nickel-manganese alloys
1. Type 201—austenitic that is hardenable through cold working
.
2. Type 202—austenitic general purpose stainless steel .
300 Series—austenitic chromium-nickel alloys
1. Type 301—highly ductile, for formed products. Also hardens
rapidly during mechanical working. Good weldability. Better
wear resistance and fatigue strength than 304.
2. Type 302—same corrosion resistance as 304, with slightly
higher strength due to additional carbon.
3. Type 303—free
machining version of 304 via addition of sulfur and phosphorus.
Also referred to as "A1" in accordance with ISO
3506.
4. Type 304—the most common grade; the classic 18/8 stainless
steel. Also referred to as "A2" in accordance with ISO
3506.
5. Type 304L— same as the 304 grade but contains less carbon
to increase weldability. Is slightly weaker than 304.
6. Type 304LN—same as 304L, but also nitrogen is added to obtain
a much higher yield and tensile strength than 304L.
7. Type 308—used as the filler metal when welding 304.
8. Type 309—better temperature resistance than 304, also sometimes
used as filler metal when welding dissimilar steels, along
with inconel.
9. Type 316—the second most common grade (after 304); for food
and surgical
stainless steel uses; alloy addition of molybdenum prevents
specific forms of corrosion. It is also known as marine grade
stainless steel due to its increased resistance to chloride
corrosion compared to type 304. 316 is often used for building nuclear
reprocessing plants. 316L is an extra low carbon grade
of 316, generally used in stainless steel watches and marine
applications due to its high resistance to corrosion. Also
referred to as "A4" in accordance with ISO
3506. 316Ti includes titanium for heat resistance, therefore
it is used in flexible chimney liners.
10. Type 321—similar to 304 but lower risk of weld
decay due to addition of titanium. See also 347 with addition
of niobium for desensitization during welding.
400 Series—ferritic and martensitic chromium alloys
1. Type 405— ferritic for welding applications .
2. Type 408—heat-resistant; poor corrosion resistance; 11%
chromium, 8% nickel.
3. Type 409—cheapest type; used for automobile exhausts;
ferritic (iron/chromium only).
4. Type 410—martensitic (high-strength iron/chromium). Wear-resistant,
but less corrosion-resistant.
5. Type 416—easy to machine due to additional sulfur .
6. Type 420—Cutlery Grade martensitic; similar to the Brearley's
original rustless steel. Excellent polishability.
7. Type 430—decorative, e.g., for automotive trim; ferritic.
Good formability, but with reduced temperature and corrosion
resistance.
8. Type 439—ferritic grade, a higher grade version of 409 used
for catalytic converter exhaust sections. Increased chromium
for improved high temperature corrosion/oxidation resistance.
9. Type 440—a higher grade of cutlery steel, with more carbon,
allowing for much better edge retention when properly heat-treated.
It can be hardened to approximately Rockwell 58
hardness, making it one of the hardest stainless steels. Due
to its toughness and relatively low cost, most display-only
and replica swords or knives are made of 440 stainless. Also
known as razor blade steel. Available in four grades: 440A,
440B, 440C, and the uncommon 440F (free machinable). 440A,
having the least amount of carbon in it, is the most stain-resistant;
440C, having the most, is the strongest and is usually considered
more desirable in knifemaking than 440A, except for diving
or other salt-water applications.
10. Type 446—For elevated temperature service .
11. 500 Series—heat-resisting chromium alloys.
12. 600 Series—martensitic precipitation
hardening alloys
13. 601 through 604: Martensitic low-alloy steels.
14. 610 through 613: Martensitic secondary hardening steels.
15. 614 through 619: Martensitic chromium steels.
16. 630 through 635: Semiaustenitic and martensitic precipitation-hardening
stainless steels.
17. Type 630 is most common PH stainless, better known as 17-4;
17% chromium, 4% nickel.
18. 650 through 653: Austenitic steels strengthened by hot/cold
work. 660 through 665: Austenitic superalloys; all grades except
alloy 661 are strengthened by second-phase precipitation.
19. Type 2205— the most widely used duplex (ferritic/austenitic)
stainless steel grade. It has both excellent corrosion resistance
and high strength.
STAINLESS STEEL FINISHES:
1. No. 0 - Hot rolled, annealed, thicker plates.
2. No. 1 - Hot rolled, annealed and passivated.
3. No. 2D - Cold rolled, annealed, pickled and passivated.
4. No. 2B - Same as above with additional pass-through highly
polished rollers.
5. No. 2BA - Bright annealed (BA or 2R) same as above then
Bright annealed under Oxygen-free atmospheric conditions.
6. No. 3 - Coarse abrasive finish applied mechanically.
7. No. 4 - Brushed finish.
8. No. 5 - Satin finish.
9. No. 6 - Matte finish.
10. No. 7 - Reflective finish.
11. No. 8 - Mirror finish.
12. No. 9 - Bead blast finish.
13. No. 10 - heat colored finish-wide range of electropolished & heat
colored surfaces.
Major classifications of steel
|
SAE designation |
Type |
1xxx |
Carbon steels |
2xxx |
Nickel steels |
3xxx |
Nickel-chromium steels |
4xxx |
Molybdenum steels |
5xxx |
Chromium steels |
6xxx |
Chromium-vanadium steels |
7xxx |
Tungsten steels |
8xxx |
Nickel-chromium-vanadium steels |
9xxx |
Silicon-manganese steels |
Mechanical finish designations
#3 Finish
1. Also known as grinding, roughing or rough grinding. These
finishes are coarse in nature and usually are a preliminary
finish applied before manufacturing. An example would be
grinding gates off of castings,
2.deburring or removing excess weld material. It is coarse
in appearance and applied by using 36–100 grit abrasive.
3. When the finish is specified as #3, the material is polished
to a uniform 60–80 grit.
#4 Architectural finish
Also known as brushed, directional or satin finish. A #4 architectural
finish is characterized by fine polishing grit lines that are
uniform and directional in appearance. It is produced by polishing
the metal with a 120–180 grit belt or wheel finish and then
softened with an 80–120 grit greaseless compound or a medium
non woven abrasive belt or pad.
#4 Dairy or sanitary finish
This finish is commonly used for the medical and food industry
and almost exclusively used on stainless steel. This finish
is much finer than a #4 architectural finish. Great care should
be taken in removing the surface defects in the metal, like
pits, that could allow bacteria to grow. A #4 dairy or sanitary
finish is produced by polishing with a 180–240 grit belt or
wheel finish softened with 120–240 grit greaseless compound
or a fine non woven abrasive belt or pad.
#6 Finish
Also known as a fine satin finish. This finish is produced
by polishing with a 220–280 grit belt or wheel softened with
a 220–230 greaseless compound or very fine non woven abrasive
belt or pad. Polishing lines should be soft and less reflective
than a
#4 architectural finish.
#7 Finish
A #7 finish is produced by polishing with a 280–320 belt or
wheel and sisal buffing with a cut and color compound. This
is a semi-bright finish that will still have some polishing
lines but they should be very dull. Carbon steel and iron are
commonly polished to a #7 finish before chrome plating. A #7
finish can be made bright by color buffing with coloring compound
and a cotton buff. This is a good way to keep polishing costs
down when a part needs to be shiny but not flawless.
#8 Finish
Also known as a mirror finish. This finish is produced by polishing
with at least a 320 grit belt or wheel finish. Care should
be taken in making sure all surface defects are removed. The
part is sisal buffed and then color buffed to achieve a mirror
finish. The quality of this finish is dependent on the quality
of the metal being polished. Some alloys of steel and aluminum
cannot be brought to a mirror finish. Castings that have slag
or pits will also be difficult, if not impossible, to polish
to a #8.
