Rolling Mill Rolls

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Rolling Mill Rolls

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High-Performance Rolling Mill Rolls for Maximum Efficiency

All the melting furnaces are automatical-ly controlled by PLC with very good working conditions, they are equipped with automatic alarm system and fur-nished with perfect equipment for elimi nating smoke and dust. All the raw ma-terials for smelting are strictly controlled, the chemical composition are precisely tested to ensure the qualified melting process. Thereby, the refining process shows also excellent resuits.

The company possesses 8 melting facilities, including an Electric Arc Furnace for steel melting of 30tons, 45/70tons LF-VD Furnaces, Electric Slag Remelting Furnaces (10tons and 15tons), and medium frequency Induction Melting Furnaces (Stons, 10tons and20tons). These melting facilities in total can accomplish a daily smelting capacity of 120tons molten steel, 240tons of molten iron and 25tons of electric slag remelting.

1.Heat Treatment Equipment

– There are sixteen sets of car-type electric resis-tance furnaces and gas furnaces operating with high, medium and low temperature, two sets of dif-ferential heat treatment furnaces, one set of dual frequency induction quenching machine, two sets of spray quenching machines, one set of high-fre-quency hardening machine and two sets of deep freezing treatment troughs. All the furnaces are computer controlled, with the furnace temperature deviation less than 10 degree, which ensures very good uniformity of roll hardness.

– LMM GROUP has two sets of horizontal centrifugal casting machines, with the maximum centrifugal cast roll size of Dia. 1400x3860mm Barrel Length. The centrifugal casting machines can realize the integration of spray coating and controlling the mould temperature. They are driven by hydraulic motor and operated steadily. The speed of rotation could reach 1500r/min, which can assure the technical requirement on gravity multiple accurately and confirm the best quality of work-ing layer.

2. Forging Equipment

– There is one set of 45MN Oil Hydraulic Press which can ensure the adequate ratio of forging reduction and deformation for forged rolls.

3. Testing Equipment

– The company has the most advanced inspection and testing equipments such as X-ray Fluorescence Spectrometer, Plasma Emission Spectrometer, Optical Emission Spec-trometer(OBLF), Hydrogen/Oxgen/Nitrogen Combined Analyzer (LECO), Carbon/Sulfur Analyzer for chemical analysis, and also has Scanning Electron Microscope, Metalo-scope, Image Analyzer (Zeiss), Microhardness Tester, Universal Testing Machine, Impact Testing Machine, Analog and Digital Ultrasonic Testing Device, Magnetic Powder UT Tester, Stress Meter, Portable Leeb & Shore Hardness Tester, etc. All these instruments and equipments can guarantee the Quality Assurance effectively.

Machining Equipment

– There are 36sets of machining equipment, including CNC lathes, CNC grind-ers, and CNC double-sided milling machines. The machining range can be dia 80×1000-dia 1600x8000mm and precision ranges up to 0.003mm.

- Chemical Composition

Grade	C	Si	Mn	Ni	Cr	Mo
Cr3	0.6-1.0	0.3-0.6	0.2-0.5	0-0.8	2.5-3.5	0.2-0.5
Cr5	0.5-0.9	0.3-0.8	0.2-0.5	0-0.8	4.5-5.5	0.2-0.8

- Physical Properties

Grade	Barrel Hardness	Neck Hardness	Tensile Strength
	Shore D	Shore D	Mpa
Cr3	Work Roll: 90-100	35-50	≥950
	Intermediate Roll: 75-85
Cr5	Work Roll: 90-100	35-50	≥1050
	Intermediate Roll: 75-85

- Chemical Composition

Grade	C	Si	Mn	Ni	Cr	Mo	V	W
ICDP Roll	2.9-3.6	0.6-1.5	0.4-1.2	3.01-4.8	1.0-2.0	0.2-2.0	0.2-2.0	0.0-2.0
HiCr Iron Roll	2.3-3.3	0.3-1.0	0.5-1.2	0.7-1.7	15.0-18.0	0.7-1.5	0.0-0.6
HiCr Steel Roll	1.0-1.8	0,4-1.0	0.5-1.0	0.5-1.5	8.0-15.0	1.5-4.5
HSS Roll	1.5-2.2	0.3-1.0	0.4-1.2	0.0-1.5	3.0-8.0	2.0-8.0	2.0-9.0	0.0-8.0

- Physical Properties

Grade	Barrel Hardness	Neck Hardness	Tensile Strength
Grade	Shore D	Shore D	Mpa
ICDP Roll	70-85	35-45	≥400
HiCr Iron Roll	70-85	35-45	≥500
HiCr Steel Roll	70-85	35-45	≥700
HSS Roll	80-90	35-45	≥700

- Chemical Composition

Grade	C	Si	Mn	Ni	Cr	Mo	V	W
ICDP Roll	2.9-3.6	0.6-1.5	0.4-1.2	3.01-4.8	1.0-2.0	0.2-1.0
HiCr Iron Roll	2.3-3.3	0.3-1.0	0.5-1.2	0.7-1.7	15.0-18.0	0.7-1.5	0.0-0.6
HiCr Steel Roll	1.0-1.8	0.4-1.0	0.5-1.0	0.5-1.5	8.0-15.0	1.5-4.5
HSS Roll	1.5-2.2	0.3-1.0	0.4-1.2	0.0-1.5	3.0-8.0	2.0-8.0	2.0-9.0	0.0-8.0

- Physical Properties

Grade	Barrel Hardness	Neck Hardness	Tensile Strength
Grade	Shore D	Shore D	Mpa
ICDP Roll	65-80	35-45	≥400
HiCr Iron Roll	65-80	35-45	≥500
HiCr Steel Roll	65-80	35-45	≥700

- Chemical Analysis

Designation of rolls	Material code	C	Si	Mn	Ni	Cr	Mo
CrMo indefinite chilled cast iron roll	IC	3.1-3.4	0.6-0.9	0.5-1.0		0.7-1.1	0.2-0.6
NiCrMo indefinite chilled cast iron roll (I)	IC I	3.1-3.4	0.6-0.9	0.5-1.0	0.6-0.8	0.7-1.1	0.2-0.6
NiCrMo indefinite chilled cast iron roll (II)	IC II	3.1-3.4	0.6-1.0	0.5-1.0	2.2-2.8	0.7-1.1	0.2-0.6
NiCrMo indefinite chilled cast iron roll (III)	IC III	3.1-3.4	0.6-1.0	0.5-1.0	2.2-2.8	0.8-1.3	0.2-1.0
NiCrMo indefinite chilled cast iron roll (IV)	IC IV	3.1-3.4	0.6-1.0	0.5-1.0	3.1-4.3	1.0-1.3	0.2-1.0
NiCrMo indefinite chilled cast iron roll (V)	IC V	3.1-3.4	0.8-1.2	0.5-1.0	3.8-4.5	1.4-2.0	0.2-1.2

- Physical Properties

Designation of rolls	Material code	Barrel hardness (HSD)	Neck hardness (HSD)	Tensile strength (Mpa)
CrMo indefinite chilled cast iron roll	IC	50-70	35-55	>160
NiCrMo indefinite chilled cast iron roll (1)	IC I	55-72	35-55	>160
NiCrMo indefinite chilled cast iron roll (II)	IC II	55-72	35-55	>160
NiCrMo indefinite chilled cast iron roll (III)	IC III	65-78	35-55	>350
NiCrMo indefinite chilled cast iron roll (IV)	IC IV	70-83	35-55	>350
NiCrMo indefinite chilled cast iron roll (V)	IC V	77-82	35-55	>350

- Microstructure

Designation of rolls	Material code	Microstructure
CrMo indefinite chilled cast iron roll	IC	Pearlite+cementite small percentage graphite
NiCrMo indefinite chilled cast iron roll (1)	IC I	Pearlite+cementite+small percentage graphite
NiCrMo indefinite chilled cast iron roll (II)	IC II	Fine pearlite cementite+small percentage graphite
NiCrMo indefinite chilled cast iron roll (III)	IC III	Sorbite+cementite+small percentage graphite
NiCrMo indefinite chilled cast iron roll (IV)	IC IV	Sorbite tempered bainite+carbide+graphite+A small amount of martensite or bainite carbide+graphite
NiCrMo indefinite chilled cast iron roll (V)	IC V	Sorbite tempered bainite+carbide+graphite+A small amount of martensite or bainite carbide graphite

- Application

Designation of rolls	Material code	Microstructure
CrMo indefinite chilled cast iron roll	IC	Pearlite+cementite small percentage graphite
NiCrMo indefinite chilled cast iron roll (1)	IC I	Pearlite+cementite+small percentage graphite
NiCrMo indefinite chilled cast iron roll (II)	IC II	Fine pearlite cementite+small percentage graphite
NiCrMo indefinite chilled cast iron roll (III)	IC III	Sorbite+cementite+small percentage graphite
NiCrMo indefinite chilled cast iron roll (IV)	IC IV	Sorbite tempered bainite+carbide+graphite+A small amount of martensite or bainite carbide+graphite
NiCrMo indefinite chilled cast iron roll (V)	IC V	Sorbite tempered bainite+carbide+graphite+A small amount of martensite or bainite carbide graphite

- Chemical Analysis

Designation of rolls	Material code	C	S	Mn	Ni	Cr	Mo
NiCrMo chilled cast iron rolls (I)	CC I	3.00-3.40	0.30-0.80	0.20-1.00	0.50-1.00	0.20-0.60	0.20-0.60
NiCrMo chilled cast iron rolls (II)	CC II	3.00-3.40	0.30-0.80	0.20-1.00	1.10-2.00	0.30-1.20	0.20-0.60
NiCrMo chilled cast iron rolls (III)	CC III	3.00-3.40	0.30-0.80	0.20-1.00	2.10-3.00	0.50-1.50	0.20-0.60
NiCrMo chilled cast iron rolls (IV)	CC IV	3.00-3.40	0.30-0.80	0.20-1.00	3.10-4.00	0.50-1.70	0.20-0.60

- Physical Properties

Designation of rolls	Material code	Barrel hardness (HSD)	Neck hardness (HSD)	Tensile strength (Mpa)
NiCrMo chilled cast iron rolls (I)	CC I	60-70	32-50	>150
NiCrMo chilled cast iron rolls (II)	CC II	62-75	35-52	>150
NiCrMo chilled cast iron rolls (III)	CC III	65-80	32-45	>350
NiCrMo chilled cast iron rolls (IV)	CC IV	70-85	32-45	>350

- Microstructure

Designation of rolls	Material code	Microstructure
NiCrMo chilled cast iron rolls (I)	CC I	Pearlite+cementite
NiCrMo chilled cast iron rolls (II)	CC II	Fine pearlite+cementite
NiCrMo chilled cast iron rolls (III)	CC III	Fine pearlite+cementite
NiCrMo chilled cast iron rolls (IV)	CC IV	Sorbite+cementite

- Application

Designatian ot rolis	Material code	Application
NiCrMo chilled cast iron rolls (I)	CC I	Section mill, bar mill, wire-rod mill narrow strip mill, finishing stand
NiCrMo chilled cast iron rolls (II)	CC II	Section mill, bar mill, wire-rod mill narrow strip mill, finishing stand
NiCrMo chilled cast iron rolls (III)	CC III	Section mill, bar mill, wire-rod mill narrow strip mill, finishing stand
NiCrMo chilled cast iron rolls (IV)	CC IV	Section mill, bar mill, wire-rod mill narrow strip mill, finishing stand

- Chemical Analysis

Designation of rolls	Material code	C	Si	Mn	Ni	Cr	Mo	Mg
CrMo indefinite chilled SG cast iron rolls	SG II	3.00-3.40	1.40-1.90	0.20-0.80		0.20-0.60	0.20-0.60	≥0.04
NiCrMo indefinite chilled SG cast iron rolls (I)	SG IV	3.00-3.40	1.40-1.90	0.40-0.80	0.50-1.00	0.20-0.60	0.20-0.60	≥0.04
NiCrMo indefinite chilled SG cast iron rolls (II)	SG V	3.00-3.40	1.40-1.90	0.40-0.80	1.10-2.00	0.30-1.00	0.20-0.60	≥0.04

- Physical Properties

Designation of rolls	Material code	Barel hardness (HSD)	Neck hardness (HSD)	Tensile strength (Mpa)
CrMo indefinite chilled SG cast iron rolls	SG II	50-70	35-55	>320
NiCrMo indefinite chilled SG cast iron rolls (I)	SG IV	50-70	35-55	>320
NiCrMo indefinite chilled SG cast iron rolls (II)	SG V	60-70	35-55	>320

- Microstructure

Designation of rolis	Material code	Microstructure
CrMo indefinite chilled SG cast iron rolls	SG II	Pearlite+cementite+small Graphite
NiCrMo indefinite chilled SG cast iron rolls (I)	SG IV	Pearlite+cementite+small Graphite
NiCrMo indefinite chilled SG cast iron rolls (II)	SG V	Fine pearlite+cementite+small Graphite

- Application

Designatian of rolls.	Material code	Application
CrMo indefinite chilled SG cast iron rolls	SG II	Profile, rod, wire and narrow strip mill thick in the rolling mill stand
NiCrMo indefinite chilled SG cast iron rolls (I)	SG IV	Profie, rod, wire and narrow strip mill thick in the rolling mill stand
NiCrMo indefinite chilled SG cast iron rolls (II)	SG V	Profile, rod, wire and narrow strip mill thick in the roling mill stand

- Chemical Analysis

Designation of rolis	Material code	C	S	Mn	Ni	Cr	Mo	Mg
Pearlitic ductile cast iron roll (I)	SGP I	3.00-3.40	1.40-1.90	0.40-0.80	1.50-2.00	0.20-0.60	0.20-0.60	≥0.04
Pearlitic ductile cast iron roll (II)	SGP II	3.00-3.40	1.20-2.00	0.40-0.80	2.01-2.50	0.20-1.00	0.20-0.60	≥0.04
Pearlitic ductile cast iron roll (III)	SGP III	3.00-3.40	1.00-2.00	0.40-0.80	2.51-3.00	0.20-1.20	0.20-0.60	≥0.04

- Physical Properties

Designation of rolis	Material code	Barrel hardness (HSD)	Neck hardness (HSD)	Tensile strength (Mpa)
Pearlitic ductile cast iron roll (I)	SGP I	45-55	35-55	>450
Pearlitic ductile cast iron roll (II)	SGP II	55-65	35-55	>450
Pearlitic ductile cast iron roll (III)	SGP III	62-72	35-55	>450

- Microstructurs

Designation of rolis	Material code	Microstructure
Pearlitic ductile cast iron roll (I)	SGP I	Pearlite cementite small Graphite
Pearlitic ductile cast iron roll (II)	SGP II	Pearlite cementite+small Graphite
Pearlitic ductile cast iron roll (III)	SGP III	Globular pearlite+carbide+graphite or a small amount of pearlite+bainite+carbide+spherical graphite

- Application

Designation of rolis	Material code	Application
Pearlitic ductile cast iron roll (I)	SGP I	Profile, rod, wire and narrow strip mill thick in the roling mill stand
Pearlitic ductile cast iron roll (II)	SGP II	Profile, rod, wire and narrow strip mill thick in the roling mill stand
Pearlitic ductile cast iron roll (III)	SGP III	Profile, rod, wire and narrow strip mill thick in the roling mill stand

- Chemical Analysis

Designation of rolls	Material code	C	SI	Mn	Ni	Cr	Mo	Mo
Bainite ductile cast iron roll Centrifugal (I)	SGA I	3.00-3.40	1.20-2.20	0.40-0.80	3.01-3.50	0.20-0.80	0.50-1.00	≥0.04
Bainite ductile cast iron roll Centrifugal (II)	SGA II	3.00-3.40	1.00-2.00	0.40-0.80	3.51-4.50	0.20-1.00	0.50-1.00	≥0.04

- Physical Properties

Designation of rolls	Material code	Barrel hardhess (HSD)	Neck hardness (HSD)	Tensile strength (Mpa)
Bainite ductile cast iron roll Centrifugal (I)	SGA I	55-78	32-45	>350
Bainite ductile cast iron roll Centrifugal (II)	SGA II	60-80	32-45	>350

- Microstructurs

Designation of rolls	Material code	Microstructure
Bainite ductile cast iron roll Centrifugal (I)	SGA I	Bainite A small amount of martensite+Carbide graphite
Bainite ductile cast iron roll Centrifugal (II)	SGA II	Bainite+A small amount of martensite+Carbide+graphite

- Application

Designation of rolls	Material code	Application
Bainite ductile cast iron roll Centrifugal (I)	SGA I	Beam, bar, wire rod mill rough rolling, the rolling, pre-finishing mill stand; seamless steel pipe mill reducing rack set
Bainite ductile cast iron roll Centrifugal (II)	SGA II	Beam, bar, wire rod mill rough rolling, the rolling, pre-finishing mill stand; seamless steel pipe mill reducing rack set

- Chemical Analysis

Designation of rolls	Material code	C	Si	Mn	Ni	Cr	Mo
Centrifugal cast iron roll I	HCr I	3.00-3.30	0.30-1.00	0.50-1.20	0.70-1.70	12.00-15.00	0.70-1.50
Centrifugal cast iron roll II	HCr II	3.00-3.30	0.30-1.00	0.50-1.20	0.70-1.70	15.01-18.00	0.70-1.50
Centrifugal cast iron roll III	HCr III	3.00-3.30	0.30-1.00	0.50-1.20	0.70-1.70	18.01-22.00	1.51-3.00

- Physical Properties

Designation of rolls	Material code	Barrel hardness (HSD)	Neck hardhess(HSD)	Tensile strength(HSD)
Centrifugal cast iron roll I	HCr I	60-75	32-45	>350
Centrifugal cast iron roll II	HCr II	65-80	32-45	>350
Centrifugal cast iron roll III	HCr III	75-90	32-45	>350

- Microstructurs

Designation of rolls	Material code	Microstructure
Centrifugal cast iron roll I	HCr I	Bainite+carbide
Centrifugal cast iron roll Il	HCr II	Bainite+carbide
Centrifugal cast iron roll III	HCr III	A small amount of bainite+martensite+carbide

- Application

Designation of rolls	Material code	Application
Centrifugal cast iron roll I	HCr I	Beam, bar, wire rod mill finishing stand; Tropical rough rolling androlling and finishing work roll front; Wide plate mill work roll;
Centrifugal cast iron roll II	HCr II	Beam, bar, wire rod mill finishing stand; Tropical rough rolling androlling and finishing work roll front; Wide plate mill work roll;
Centrifugal cast iron roll III	HCr III	Beam, bar, wire rod mill finishing stand; Tropical rough rolling androlling and finishina work roll front: Wide plate mill work roll:

- Chemical Analysis

Designation of rolls	Material code	Barrel hardness (HSD)	Neck hardness (HSD)	Tensile strength (Mpa)
Zu60CMoMn	AS60	35-50	≤45	>650
Zu60CrMoMnNi	AS60 I	35-45	≤45	>750
Zu65CrNiMo	AS65 I	35-45	≤45	>750
Zu70Mn	AS70	32-42	≤45	>650
Zu70Mn2	AS70 I	35-45	≤45	>680
Zu70Mn2Mo	AS70 II	35-45	≤45	>700
Zu75CrMo	AS75	35-50	≤45	>700
Zu75CrNiMnMo	AS75 I	35-50	≤45	>800

- Physical Properties

Designation of rolls	Material code	Barrel hardness (HSD)	Neck hardness (HSD)	Tensile strength (Mpa)
Zu60CMoMn	AS60	35-50	≤45	>650
Zu60CrMoMnNi	AS60 I	35-45	≤45	>750
Zu65CrNiMo	AS65 I	35-45	≤45	>750
Zu70Mn	AS70	32-42	≤45	>650
Zu70Mn2	AS70 I	35-45	≤45	>680
Zu70Mn2Mo	AS70 II	35-45	≤45	>700
Zu75CrMo	AS75	35-50	≤45	>700
Zu75CrNiMnMo	AS75 I	35-50	≤45	>800

- Application

Designation of rolls	Material code	Application
Zu60CMoMn	AS60	Bar, wire, strip, steel roughing
Zu60CrMoMnNi	AS60 I	Bar, wire, strip, steel roughing
Zu65CrNiMo	AS65 I	Bar, wire, strip, steel roughing
Zu70Mn	AS70	Bar, wire, strip, steel roughing
Zu70Mn2	AS70 I	Bar, wire, strip, steel roughing
Zu70Mn2Mo	AS70 II	Bar, wire, strip, steel roughing
Zu75CrMo	AS75	Bar, wire, strip, steel rough rolling, narrow steel support roller
Zu75CrNiMnMo	AS75 I	Bar, wire, strip, steel rough rolling, narrow steel support roller

- Chemical Analysis

Designation of rolls	Material code	C	Si	Mr	Ni	Cr	Mo
ZuB140CrNiMo	AD140 I	1.30-1.50	0.30-0.60	0.70-1.10	0.50-1.20	0.80-1.20	0.20-0.60
ZuB160CrNiMo	AD160 I	1.50-1.70	0.30-0.60	0.80-1.30	≥0.20	0.80-2.00	0.20-0.60
ZuB180CrNiMo	AD180	1.70-1.90	0.30-0.80	0.60-1.10	0.20-2.00	0.80-1.50	0.20-0.60
ZuB190CrNiMo	AD190	1.80-2.00	0.30-0.80	0.60-1.20	1.00-2.00	1.50-3.50	0.20-0.50
ZuB200CrNiMo	AD200	1.90-2.10	0.30-0.80	0.80-1.20	0.60-2.50	0.60-2.00	0.20-0.80

- Physical Properties

Designation of rolls	Material code	Barrel hardness (HSD)	Neck hardness (HSD)	Tensife strength (Mpa)
ZuB140CrNiMo	AD140 I	35-50	≤60	500-800
ZuB160CrNiMo	AD160 I	40-60	≤50	500-800
ZuB180CrNiMo	AD180	45-60	≤50	450-700
ZuB190CrNiMo	AD190	50-65	≤50	450-700
ZuB200CrNiMo	AD200	50-65	≤50	450-700

- Application

Designation of rolls	Material code	Application
ZuB140CrNiMo	AD140 I	Bar, wire, steel, strip rough rolling, the vertical roll
ZuB160CrNiMo	AD160 I	Bar, wire, steel, crude and rolled strip, vertical roller, roll rings, support roller
ZuB180CrNiMo	AD180	Bar, wire, steel, crude and rolled strip, vertical roller, roll rings, support roller
ZuB190CrNiMo	AD190	Bar, wire, steel, crude and rolled strip, vertical roller, roll rings, support roller
ZuB200CrNiMo	AD200	Bar, wire, steel, crude and rolled strip, vertical roller, roll rings, support roller

- Chemical Analysis

Designation of rolls	Material code	C	Si	Mn	Ni	Cr	Mo
ZuS140CrNiMo	GS140	1.30-1.50	1.30-1.60	0.50-0.80		0.40-0.70	0.20-0.50
ZuS160CrNiMo	GS160	1.50-1.70	0.30-1.50	0.60-1.00	0.20-1.00	0.50-1.50	0.20-0.30
ZuS190CrNiMo	GS190	1.80-2.00	0.80-1.50	0.60-1.00	0.60-2.20	0.50-2.00	0.20-0.80

- Physical Properties

Designation of rolls	Material code	Barrel hardness (HSD)	Neck hardness (HSD)	Tensile strength (Mpa)
ZuS140CrNiMo	GS140	36-46	≤46	≥540
ZuS160CrNiMo	GS160	45-55	≤50	≥500
ZuS190CrNiMo	GS190	50-65	≤50	≥450

- Application

Designation of rolls	Matarial code	Application
ZuS140CrNiMo	GS140	Small and medium steel, thick wire rod mill, hot strip rough roll, roller universal rolling mill
ZuS160CrNiMo	GS160	Small and medium steel, thick wire rod mill, hot strip rough roll, roller universal rolling mill
ZuS190CrNiMo	GS190	Small and medium steel, thick wire rod mill, hot strip rough roll, roller universal rolling mill

- Chemical Analysis

Designation of rolls	Material code	C	Si	Mn	Ni	Cr	Mo
CS	HCrS	1.00-1.80	0.40-1.00	0.50-1.00	8.00-15.00	0.50-1.50	1.50-4.50

- Physical Properties

Designation of rolls	Material code	Barrel hardness (HSD)	Neck hardness (HSD)	Tensile strength (Mpa)
CS	HCrS	70-85	35-45	≥450

- Application

Designation of rolis	Material code	Application
CS	HCrS	Hot strip roughing and finishing work roll front, wide plate mill work roll; steel universal mill roll

- Chemical Analysis

Designation of rolls	Material code	C	Si	Mo	Ni	Cr	Mo	V	W
HSS	HSS	1.50-2.20	0.30-1.00	0.40-1.20	0.00-1.50	3.00-8.00	2.00-8.00	2.00-9.00	0.00-2.00
S-HSS	S-HSS	0.60-1.20	0.80-1.50	0.50-1.00	0.20-1.20	3.00-9.00	2.00-5.00	0.40-3.00	0.00-3.00

- Physical Properties

Designation of rolls	Material code	Barrel hardness (HSD)	Roll neck strength (Mpa)	Tensile strength (Mpa)
HSS	HSS	75-85	30-45	400-500
S-HSS	S-HSS	75-88	30-45	400-500

- Application

Designation of rolls	Material code	Application
HSS	HSS	Rolled strip, bar finishing roller, high speed wire pre-finishing, steel roller universalrolling mill, wide plate mill work roll
S-HSS	S-HSS	Rough rolling hot strip mill work roll, cold rolled strip steel work roll, intermediate roll

	Specification	Material	Product code	Barrel hardness (HSD)
Finished frame mill roll, prefinished frame mill roll	Ф280-Ф550	High-performance high speed steel	LMM01	82-88
Cutting frame mill roll	Ф280-Ф550	High-performance segmentation high speed steel	LMM02	75-78
Pre-cutting frame milt rolf	Ф280-Ф550	High-performance segmentation high speed steel	LMM03	78-81

- Raw Material

• Only work with 2-3 qualified long-term suppliers
• Each batch of raw material has quality certificate
• Acceptance test on receipt by our own laboratory
• Annual audit evaluation to all suppliers

- Test & Inspection

• Well equipped chemical and physical labs
• Standard test and inspection procedures
Records and samples are kept till roll scraped
• Final inspection done by QC Dept of third party

- Quality Staff

• Advanced and mature process as shown previously Technical confirmation during Heat Treatment process
• Most of equipments are computer-controlled
Standard operation guided by specified process cards
• Traceable operation records

- Manufacturing Process

• Well-trained and certified
• Main technical staff and key workers are with over 20 years experience in roll industry

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Rolling Mill Rolls

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Rolling Mill Rolls

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High-Performance Rolling Mill Rolls for Maximum Efficiency

1.Heat Treatment Equipment

2. Forging Equipment

3. Testing Equipment

Machining Equipment

- Chemical Composition

- Physical Properties

- Chemical Composition

- Physical Properties

- Chemical Composition

- Physical Properties

- Chemical Analysis

- Physical Properties

- Microstructure

- Application

- Chemical Analysis

- Physical Properties

- Microstructure

- Application

- Chemical Analysis

- Physical Properties

- Microstructure

- Application

- Chemical Analysis

- Physical Properties

- Microstructurs

- Application

- Chemical Analysis

- Physical Properties

- Microstructurs

- Application

- Chemical Analysis

- Physical Properties

- Microstructurs

- Application

- Chemical Analysis

- Physical Properties

- Application

- Chemical Analysis

- Physical Properties

- Application

- Chemical Analysis

- Physical Properties

- Application

- Chemical Analysis

- Physical Properties

- Application

- Chemical Analysis

- Physical Properties

- Application

- Raw Material

- Test & Inspection

- Quality Staff

- Manufacturing Process

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