High Strength Nodular Iron Rolls for Rolling Mill

• Casting Method: Sand Casting or Special Casting
• Casting Form Material: Metal
• Casting Metal: Cast Iron
• Casting Form Usage Count: Semi-permanent
• Surface Treatment: Polishing
• Surface Roughness: as Drawing
• Model NO.: CY1988R031
• Coating: as Drawing
• Machining Tolerance: as Drawing
• Standard: GB
• Certification: CE, ISO 9001:2000, ISO 9001:2008
• Size: φ200-φ1500
• Material1: Cast Iron, Semi Steel, Alloy Steel
• Material2: Chilled Cast Iron, Indefinite Chill Cast Iron,
• Material3: Ductile Iron,High Chromium Cast Iron,HSS
• Material4: Casting Cr3, Cr5
• Material5: Forging Cr3, Cr5, Cr8
• Transport Package: Metal Pallet or Wooden Case
• Specification: AS Drawing
• Trademark: Changyear
• Origin: China
• HS Code: 84553000
• Production Capacity: 5000PCS/Year

Product Description

Product Description

It is used in the roughing stands of round and sections, especially the BD2 mills for rail & beams.

Compared with other nodular iron rolls, NCC rolls have unique material and heat treatment process ensuring they are good enough to replace the traditional cast steel rolls but with a better life.

We control the carbide at a very low level (less than 5%) by reducing the chrome down to 0.3%, raising the silicon and applying isothermal quenching to make the carbide solid solution into the matrix.

Meanwhile, we can achieve a matrix of tempered sorbite/bainite by applying heat treatment d increasing nickel. This type of matrix has much better performance than the pearlite on the resistance of wear, fire crack and impact, especially the excellent red hardness thanks to the molybdenum.

Product Parameters

Chemical Composition

Grade	C	Si	Mn	P	S	Cr	Ni	Mo
NCC I	3.00-3.40	2.00-2.50	0.80-1.00	≤0.10	≤0.030	≤0.15	2.00-3.00	0.40-0.70
NCC II	3.00-3.40	1.50-2.00	0.80-1.00	≤0.10	≤0.030	≤0.15	2.50-4.50	0.50-1.00

 

 

 

Mechanical Properties

Tensile Strength (kg/mm²)	≥520
Bending Strength (kg/mm²)	970-1380
Elongation (%)	0.2-0.5