|
SPE Cont. |
S ≥ |
FE ≥ |
SI ≤ |
AS ≤ |
P ≤ |
C ≤ |
PB ≤ |
H2O ≤ |
SIZE ≥ |
|
S48 |
48% |
43% |
3.0% |
0.01% |
0.01% |
0.8% |
0.15% |
0.5% |
95% |
|
S45 |
45% |
40% |
5.0% |
0.01% |
0.01% |
0.8% |
0.15% |
1.0% |
95% |
|
S40 |
40% |
35% |
-- |
0.01% |
0.01% |
0.8% |
0.15% |
1.0% |
95% |
|
SIZE |
(3-8)mm/(3-15)mm/(10-50)mm or other size |
||||||||
|
PKG |
25kg/500kg/1000kg/bag or other packing |
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Application Scenarios of black iron sulfide as Sulfur Additive
It is mainly used in iron and steel smelting, cast iron casting, free‑cutting steel production, and machinable steel materials:
Smelting of free‑cutting steel (primary application)
Applicable steel grades: Y12, Y15, Y20, Y40Mn, 1215, 1144 and other free‑cutting structural steels
Purpose: Improve machinability, enabling easy chip breaking, non‑sticking to tools, and high surface finish
Industries: Machinery manufacturing, auto parts, fasteners, precision hardware
Gray iron and ductile iron casting
Applicable: Gray iron (HT200, HT250), ductile iron (QT450, QT500), wear‑resistant cast iron
Function: Promote graphitization, refine graphite, reduce chill tendency, improve fluidity and machinability
Industries: Machine tool castings, engine blocks, pumps and valves, pipelines, mechanical bases
Sulfur addition for ordinary carbon steels and structural steels
Applicable: 45# steel, Q235, 40Cr, 42CrMo and other structural steels requiring improved machinability
Purpose: Increase machining efficiency and reduce tool wear
Industries: General machinery, die steel, shaft parts, gear processing
Sulfur addition for stainless steels and alloy steels
Applicable: 303 free‑cutting stainless steel, 416 stainless steel, some heat‑resistant steels
Function: Improve the difficult machinability of stainless steels and enhance processing efficiency
Industries: Food machinery, medical devices, precision instruments
Wear‑resistant materials, bearing steels, spring steels (moderate sulfur addition)
Applicable: Wear‑resistant cast iron, some bearing steels, spring steels
Function: Appropriate sulfur refines microstructure, improves toughness, and reduces cracking
Industries: Mining machinery, wear‑resistant parts, spring manufacturing
Sulfur addition for recycled iron and scrap steel melting
Applicable: Medium‑frequency furnaces, cupolas for melting recycled iron and scrap steel
Function: Supplement sulfur content, stabilize molten iron composition, and improve casting performance
