Sulphur Cored Wires - Minex
Sulphur Cored Wires - Minex
Sulphur Cored Wires - Minex
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<strong>Sulphur</strong> <strong>Cored</strong> <strong>Wires</strong><br />
CORED WIRES<br />
SULPHUR – FOR STEEL<br />
<strong>Minex</strong> Metallurgical Co. Ltd.<br />
Pouring Reliability Into Your Melt - Alloying Solution in Foundry Industry
<strong>Sulphur</strong> <strong>Cored</strong> <strong>Wires</strong><br />
SULPHUR ADDITION IN STEEL<br />
Many steel specifications require significant alloying quantities of sulphur, primarily for its ability to improve<br />
machinability of the final product. Indeed, in some applications such as forging dies, the product may be<br />
ordered to any one of a number of machinability ratings as well as hardenability and other factors.<br />
<strong>Sulphur</strong> is used as an alloying addition to improve machinability. Increasing the sulphur content from nominal<br />
say 0.008% to 0.060% lowers the charpy upper shelf level, thereby raising the transition temperature as fixed by<br />
a given impact energy.<br />
ADDITION PRACTICE<br />
The addition of sulphur, and close control over the degree of addition, is an important step in the steelmaking<br />
process. There is various ways to add sulphur into steel melt. Usually the sulphur is added in steel melt<br />
(temperature 1500 - 1600°C) the form of stick sulphur which is, essentially, elemental sulphur. From experience<br />
it has been determined that recovery of about 40 - 50% can be expected from stick sulphur. The<br />
non-recovered sulphur easily ignites in air to form sulphur dioxide, a noxious gas with a strong, pungent<br />
objectionable odor. Since the density of the stick sulphur (2.08 gm/cc) is low and the boiling point (444.72°C)<br />
is also low, this sulphur vapor generation, and subsequent sulphur dioxide fume generation, occurs before<br />
molten steel reactions involving sulphur can reach completion. As those skilled in the art will appreciate, the<br />
steel reactions are essentially the formation of Mn S in the steel which is non-odorous coupled with the<br />
vaporization of uncombined sulphur, which vaporization causes environmental conditions to become very<br />
objectionable.<br />
Whereas in cored wire Injection system the recovery<br />
of sulphur is 60 – 70% with precise control of<br />
composition. In sulphur cored wire, sulphur is<br />
encapsulated in steel sheath, when injected into<br />
steel it can go in depth of steel melt as shown in<br />
figure, where due to sufficient ferrostatic pressure,<br />
sulphur bubbles slowly raise to surface and react<br />
efficiently in steel melt and also control of wire<br />
feeding with help of wire feeder at desired speed<br />
ensures high recovery, precise composition control<br />
and less fumes generation. Thus the cored wire<br />
injection into the steel is environmental friendly due to<br />
less fumes generation and economical due to high<br />
recovery and less heat rejection.<br />
Selenium <strong>Cored</strong> Wire Specification<br />
Chemical composition of <strong>Sulphur</strong> <strong>Cored</strong> Wire<br />
Grade S (Min) Si (Max) Moist (Max)<br />
S 98 98 0.2 0.3<br />
Pouring Reliability Into Your Melt - Alloying Solution in Foundry Industry
<strong>Sulphur</strong> <strong>Cored</strong> <strong>Wires</strong><br />
Powder specification<br />
Grad Density Melting<br />
e (gm/cc Point<br />
Boiling<br />
Point<br />
(°C)<br />
Strip Specification<br />
Size (mm) Grade Diameter<br />
(, mm)<br />
) (°C)<br />
S 2.08 115 - 120 444.7 0.106 – 0.2 EDD IS 513 9±0.5<br />
13±0.2<br />
Wire Characteristics<br />
Grad Diameter (, mm) Shape Powder Fill (gm/mt)<br />
e<br />
S 9 ± 0.5 Round 100 ± 10<br />
13±0.2 Round 200±20<br />
Thickness<br />
(mm)<br />
0.40<br />
±0.03<br />
0.40±0.03<br />
Coil Specification (Flipping Coil – Horizontal & Vertical)<br />
Details<br />
9 mm 13 mm Coil Identification<br />
F1-02 F1-05 F2-05 F2-10<br />
Powder 0.250 0.500 0.500 1.000<br />
Weight (MT)<br />
Strip Weight 0.300 0.600 0.435 0.870<br />
(MT)<br />
Net Weight 0.550 1.100 0.935 1.870<br />
(MT)<br />
Length 2500 5000 2500 5000<br />
(Mtrs)<br />
Internal<br />
Diameter<br />
(mm)<br />
650 650 650 650<br />
External<br />
Diameter<br />
(mm)<br />
800 1000<br />
Height (mm) 630 630<br />
1100 1170<br />
630 1000<br />
All coils are color coded and fixed with a detailed sticker<br />
clearly displaying details such as coil no., powder<br />
content, strip weight, gross weight density & length. A<br />
fluorescent sticker displays the name of the product in<br />
bold letters on the outer diameter of the coil.<br />
Handling<br />
No metal sling, chain or rod is to be used across the ID of<br />
the coil for handling as it may damage the coil. Use only<br />
polyester, synthetic slings, fork lift/tractor to handle the<br />
coil. The pallet is an integral part of the coil and it is to be<br />
removed till the coil is consumed.<br />
Shelf Life<br />
Follow the shelf life period specified by MINEX<br />
Packing<br />
Packing in flipping cage and mounted on wooden /<br />
mild steel pallet and strapped with pallet horizontally<br />
or vertically. All coils are wrapped in stretch film &<br />
palletized<br />
Storage & Safety<br />
To be stored in dry & covered area away from heat<br />
and moisture. Material Safety Data Sheet can be<br />
supplied on demand<br />
Pouring Reliability Into Your Melt - Alloying Solution in Foundry Industry