Durable HSS Roll for Efficient Metal Cutting and Shaping

• Customization: Available
• Type: Rolling Machine
• Forging Forming Method: Mold Forging
• Feature: High Efficiency
• Certification: CCC, ISO9001, CE
• Warranty: 12 Months
• Customized: Customized
• Advantage: Easy to Maintenance
• Condition: New
• Trademark: CNBM
• Origin: China
• HS Code: 8455300000
• Production Capacity: 500000 Ton/Year

Product Description

The product introduction of mill roll

Equipped with advanced technological facilities on melting, casting, forging, heat treating and mechanical machining, our factory has formed 9 professional complete roll manufacturing lines of cast steel, cast iron and forged steel rolls such as strip mill rolls, heavy section mill rolls, wire & bar rolls, special shaped rolls and small-sized cold rolls and specialized production lines of bloom and slab CCM, coke oven equipments and wind power products. Annual production capacity of mill rolls is 500,000 tons, metallurgical equipment is 80,000 tons.

Physicochemical properties of HSS (High-Speed Steel) Rolls

Property	Typical Range or Value	Remarks
Chemical Composition
Carbon (C)	0.7% - 1.5%	Increases hardness and wear resistance
Tungsten (W)	5% - 10%	Enhances red hardness and wear resistance
Molybdenum (Mo)	3% - 6%	Improves red hardness and wear resistance
Chromium (Cr)	3% - 5%	Enhances wear resistance and corrosion resistance
Vanadium (V)	1% - 3%	Refines grain structure, improves wear resistance
Cobalt (Co)	0% - 10%	Optional, improves red hardness
Silicon (Si)	0.2% - 1.0%	Acts as a deoxidizer, improves casting performance
Manganese (Mn)	0.2% - 1.0%	Increases strength and toughness
Hardness
Surface Hardness	60-70 HRC	High surface hardness ensures wear resistance
Core Hardness	40-50 HRC	Ensures sufficient toughness
Mechanical Properties
Tensile Strength	2000-3000 MPa	High tensile strength for heavy-duty applications
Impact Toughness	10-30 J/cm²	Ensures resistance to impact loads
Wear Resistance	3-5 times higher than alloy steel	Excellent wear resistance
Red Hardness	50-60 HRC at 500-600°C	Maintains high hardness at elevated temperatures
Thermal Properties
Thermal Expansion Coefficient	10-12 × 10-6 /°C	Low thermal expansion reduces thermal stress
Thermal Conductivity	20-30 W/m·K	Relatively low thermal conductivity
Thermal Crack Resistance	Excellent	Resistant to thermal fatigue
Microstructure
Metallographic Structure	Martensite matrix + carbides (MC, M6C, etc.)	Uniformly distributed carbides enhance performance
Heat Treatment
Quenching Temperature	1100-1200°C	High-temperature quenching for maximum hardness
Tempering Temperature	500-600°C (2-3 times)	Improves toughness and stability
Application Performance
Service Life	2-3 times longer than ordinary rolls	Extended service life under hot rolling conditions
Rolling Precision	High precision, good surface quality	Suitable for high-quality rolled products

Key Features:

• High Hardness and Wear Resistance: Ideal for high-stress and high-wear applications.

• Excellent Red Hardness: Maintains performance at high temperatures (500-600°C).

• Superior Thermal and Mechanical Properties: Ensures durability and precision in hot rolling processes.

Products&Specification

Mill	Application		Material	Product Specification
Hot Strip Mill	Large-sized vertical roll		Special allot cast roll, Adamite	All Sizes
	Small-sized vertical roll		Adamite, HiCr iron
	Roughworking roll		Special alloy cast steel, Adamite, HiCr steel, Semi-HSS, HiCr iron
	Finish rolling	Early stand work roll	Hicr iron, HSS
		Later stand work rolll	ICDP, HSS
	Finishing back-up roll		Duplex cast steel	D≤⊄2000, W≤80t
			Alloy forged steel	D≤⊄2000, W≤75t
	Temper rolling	Work roll	HiCr iron	All Sizes
			Alloy forged steel
		Back-up roll	ICDP
			Duplex cast steel	D≤⊄2000, W≤80t
			Alloy forged steel	D≤⊄2000, W≤75t
CSP	Vertival roll		Adamite, Special alloy cast steel, HiCr iron	All Sizes
	Roughing work roll		Semi-Hss, HiCr steel
	Finish rolling	Early stand	HiCr iron, HSS
		Later stand	ICDP, HSS
	Roughing & Finishing back-up roll		Duplex cast steel	D≤⊄2000, W≤80t
			Alloy forged steel	D≤⊄2000, W≤75t
Steckel Mill	Vertical roll		Adamite, Special alloy cast steel	All Sizes
	Roughing work roll		ICDP, HiCr iron
	Finishing work roll		HiCr iron, ICDP
	Back-up roll		Duplex cast steel	D≤⊄2000, W≤80t
			Alloy forged steel	D≤⊄2000, W≤75t
Plate&Heavy plate mill	Rough rolling	2-hi work roll	Specially alloy cast steel, Tool steel	All Sizes
		4-hi work roll	HiCr iron, ICDP
	Finishing work roll		HiCr iron, ICDP
	Single stand work roll		HiCr iron, ICDP
	Back-up roll		Duplex cast steel	D≤⊄2000, W≤80t
			Alloy forged steel	D≤⊄2000, W≤75t
Cold strip mill & Single stand cold mill	Work roll		Alloy forged steel	All Sizes
	Intermediate roll		Alloy forged steel
	Temper roll		Alloy forged steel
	Back-up roll		Duplex cast steel	D≤⊄2000, W≤80t
			Alloy forged steel	D≤⊄2000, W≤75t
Large-sized universal structural mill	Break-down roll		Special alloy cast steel, alloy nodular iron	All Sizes
	Horizontal collar		High carbon adamite(duplex)
	Vertical collar		High carbon adamite, HiCr iron
	Edger roll		High carbon adamite
	Shaft		Alloy forged steel

Company Profile

CNBM INTERNATIONAL CORPORATION

Build your world with our materials.

We are a primary subsidiary of China National Building Material Group Co., Ltd.

CNBM Group is a central government-owned enterprise and a Fortune Global 500 company (Ranking 203th in 2019). It is the largest building material manufacturer and service provider in the world, with 15 publicly-listed companies and over 180,000 employees (2019). We have more than 300 factory plants in China. For the refractory, we are top 3 in China. We have more than 17 plants in different cities.



Workshop

Workshop is the core of our company and undertakes all of scientific research work. The company specially produces and supplies all kinds of roll used for hot strip mill, cold strip mill, plate & heavy plate mill, large-sized section mill, universal mill etc. 

Packing

Lab&Test Report

The factories of CNBM invested 2.3 billion RMB for large-scale
Our company has completed equipment and technology upgrade transformation , which was concentrated on three
projects, production line of centrifugal casting rolls for hot strip and plate mill, forged roll for cold/hot strip mill, national class technology center and roll material lab. Through upgrade transformation, the following targets have been achieved:
(1)It becomes the world's biggest specialized mill roll maker with the largest production scale, the most complete specifications of products and the most extensive coverage of various rolls used on rolling mill.
(2) The technology of equipments has reached international leading level.
(3) "Mechanization, automation, intellectualization, digitization" of equipments obviously improve the quality control ability.
(4) New types of research instruments improve the R&D capacity of products.

Customers visit


FAQ
Q:Are you a trading company or manufacturer?
A:CNBM is a large-scale central governmental industrial group with its own manufacturing sector, research and development sector, trading sector and logistics sector.

Q:I have some special requirement about specifications.
A:We have a well-rounded product range, which endows us with the capability of applying many special specifications. Please feel free to contact us with yours.

Q:Do you accept OEM service?
A:Yes, we do.

Q:What is your delivery time?
A:It depends on the size/complexity of your order and our own production schedule. Usually we provide a faster delivery than the industry's average.

Q:What is the payment term?
A:Our payment terms are negotiable.

Q:Can I have my own logo on the product?
A:Sure, we can apply your own logo on the products according to your requirement.