IRON CASTINGS

Welcome to Nimbus Industries, a trusted iron castings manufacturer delivering reliable, precision-engineered solutions through advanced in-house manufacturing facilities. As an established iron casting company, we operate a modern foundry equipped to produce durable and high-quality components for demanding industrial applications.

Our capabilities include custom iron castings developed to meet specific project requirements, along with industrial iron castings engineered for strength, consistency, dimensional accuracy, and long service life. From material selection and controlled production to machining and final inspection, every stage is carefully monitored within our facilities to maintain consistent quality and performance.

With a commitment to precision, reliability, and continuous improvement, Nimbus Industries serves as a dependable manufacturing partner for Fluid Control, Pumps & Valves, Construction, Agriculture, and Heavy Equipment industries.

Green Sand Casting

Green sand casting uses a mixture of sand, clay, and water to form molds. The mixture is packed around a pattern to create a cavity for casting. Molten metal is then poured into the mold. After solidification, the mold is broken to remove the cast part. This method supports complex shapes and detailed designs. It is widely used by leading iron castings manufacturers due to its cost efficiency. The process is suitable for machinery and agricultural components.

Shell Mold Casting

Shell mold casting uses chemically bonded sand instead of traditional green sand. The mold is created by packing sand mixed with resin and catalyst around a pattern. Once hardened, it offers better dimensional accuracy and a smoother surface finish. This method reduces casting defects and supports precision needs. It is often preferred when custom iron castings require tighter tolerances and refined finishes. Industries such as aerospace and defense rely on this process.

Material Grade & Properties

Range of Compositions for Typical Unalloyed Cast Irons (Values in Percent %)

Type of Iron	Carbon	Silicon	Manganese	Sulfur	Phosphorus
Gray	2.5 – 4.0	1.0 – 3.0	0.2 – 1.0	0.02 – 0.25	0.02 – 1.0
Ductile	3.0 – 4.0	1.8 – 2.8	0.1 – 1.0	0.01 – 0.03	0.01 – 0.1
Compacted Graphite	2.5 – 4.0	1.0 – 3.0	0.2 – 1.0	0.01 – 0.03	0.01 – 0.1
Malleable (Cast White)	2.0 – 2.9	0.9 – 1.9	0.15 – 1.2	0.02 – 0.2	0.02 – 0.2
White	1.8 – 3.6	0.5 – 1.9	0.25 – 0.8	0.06 – 0.2	0.06 – 0.2

Mechanical Properties of Cast Iron Grades

Material Grade	Brinell Hardness	Tensile Strength	Modulus of Elasticity	% Elongation (in 50 mm)
Gray Iron Class 25	187	29.9 ksi	16.1 Msi	–
Gray Iron Class 40	235	41.9 ksi	18.2 Msi	–
Ductile Iron Grade 60-40-18	130 – 170	60 ksi	24.5 Msi	–
Ductile Iron Grade 120-90-02	240 – 300	120 ksi	25.5 Msi	–
CGI Grade 250	179 max	36.2 ksi min	–	3
CGI Grade 450	207 – 269	65.2 ksi min	–	1

The material values shown above represent typical properties and may vary depending on specifications, manufacturing conditions, and customer requirements.