Melt extract steel fiber is a type of
reinforcement fiber produced by rapidly cooling and solidifying a molten stream
of steel. The process results in a unique, crescent-shaped (or
"hookless") fiber with a smooth, non-textured surface and a slightly
variable cross-section.
These fibers are primarily used to
reinforce concrete and refractory materials, where they significantly improve
properties like toughness, impact resistance, fatigue strength, and crack
control.
ADVANTAGES:
Excellent Dispersion: The smooth,
hookless fibers are less likely to interlock or "ball" during mixing,
leading to more uniform distribution in the concrete.
Good Workability: Allows for higher
fiber dosages without sacrificing the placeability of the fresh concrete
compared to some deformed fibers.
High Melting Point: Essential for
refractory applications where temperatures can exceed 1000°C.
Cost-Effective Production: The melt
extraction process is a single, continuous operation, which can make it more
economical than wire-drawing and cutting processes for certain grades.
PHYSICAL,MECHANICAL,HOT-CORROSIVE
PROPERTIES AND SPECIFICATIONS OF HEAT RESISTING RUSTLESS STEEL FIBER:
|
Performance （Alloy） |
GB310 |
GC304 |
GE430 |
GD 446 |
|
Melting
point range ℃ |
140— 1450 |
1400—1425 |
1425-- 1510 |
1425-1510 |
|
Elastic
modulus at 870 ℃ 10﹋4 Mpa |
12.4 |
12.4 |
8.27 |
9.65 |
|
Tensile
Strength at 870℃, Mpa |
152 |
124 |
46.9 |
52.7 |
|
Expansile
modulus at 870℃
10﹋-6/℃ |
18.58 |
20.15 |
13.68 |
13.14 |
|
Conductivity
at 500℃ w/m.k |
18.7 |
21.5 |
24.4 |
24.4 |
|
Gravity
at normal temperature g/cm3 |
8.0 |
8.0 |
7.8 |
7.5 |
|
Weight
loss after 1000hrs of cyclic oxygeration % |
13 |
70(100h) |
70(100h) |
4 |
|
﹡Sharp
cycling of air,oxygeration temperation ℃ |
1035 |
870 |
870 |
1175 |
|
1150 |
925 |
815 |
1095 |
|
|
Corrosive
rate in H2S mil/yr |
100 |
200 |
200 |
100 |
|
﹡Maximum
recommended temperature in SO2 ℃ |
1050 |
800 |
800 |
1025 |
|
Corrosive
ratio in natural gas at 815℃ mil/yr |
3 |
|
12 |
4 |
|
Corrosive
ratio in coal gas at 982℃ mil/yr |
25 |
225 |
236 |
14 |
|
Nitrified
ratio in non-water-amnesia at 525℃ mil/yr |
55 |
80 |
<GC >GD |
175 |
|
Corrosive
ratio in CH2 at 454℃ mil/yr |
2.3 |
48 |
21.9 |
8.7 |
|
Carbon
increment of alloy at 982℃,25hrs,40cycles % |
0.02 |
1.40 |
1.03 |
0.07 |
|
Thickness, mm Width, mm Length, mm |
<0.20 <0.50 20,25,30,35 |
|||
CHEMICAL PARAMETERS:
|
Items |
Technique data |
|||
|
|
GB310 |
GC304 |
GD446 |
GE430 |
|
C |
<
0.12 |
<
0.10 |
< 0.20 |
< 0.15 |
|
Si |
< 1.5 |
< 2.0 |
< 2.0 |
< 2.0 |
|
Mn |
< 2.0 |
< 2.0 |
< 2.0 |
< 2.0 |
|
Ni |
18---21 |
8---10 |
< 0.60 |
< 0.60 |
|
Cr |
18--20 |
18---20 |
23---27 |
17----19 |
|
P |
0.045 |
0.045 |
0.030 |
0.040 |
PACKING: in 20kg carton.(to arrange in
order).
PRIMARY APPLICATIONS:
(1)Steel Fiber Reinforced Concrete (SFRC):
Industrial Floors and Slabs on
Grade: Controls shrinkage cracking and improves impact resistance against
heavy forklift traffic and dropped objects.
Shotcrete: Used for tunnel linings,
slope stabilization, and swimming pools. The fibers help hold the shotcrete in
place and improve ductility.
Precast Elements: Such as pipes,
manholes, and architectural panels.
(2)Refractory Castables and Ceramics:
This is a major application. The fibers are
added to refractory concretes used to line furnaces, kilns, boilers, and
incinerators.
Function: They provide crucial thermal shock resistance. When the refractory heats and cools rapidly, it wants to crack. The fibers bridge these micro-cracks, holding the material together and preventing catastrophic failure. Their high melting point is essential here.
