HOT ROLLED & COLD ROLLED CATEGORIZATION

HOT ROLLED & COLD ROLLED HOT ROLLED & COLD ROLLED CATEGORIZATIONCATEGORIZATION

Most Hot Rolled grades can be classified into three broad groupsMost Hot Rolled grades can be classified into three broad groups::Formable Steels (ductile), Structural Steels (strength) and AnalFormable Steels (ductile), Structural Steels (strength) and Analysis or ysis or Composition (Carbon or chemical specific) Steels. There is alsoComposition (Carbon or chemical specific) Steels. There is alsoHardness Groupings e.g. HA70T that have specific applications asHardness Groupings e.g. HA70T that have specific applications asopposed to commercial applications.opposed to commercial applications.

Most Cold Rolled grades can be classified into four broad groupsMost Cold Rolled grades can be classified into four broad groups::Formable Steels (ductile), Hardness Steels, Structural Steels Formable Steels (ductile), Hardness Steels, Structural Steels (strength) and Composition Steels (Carbon or chemical specific).(strength) and Composition Steels (Carbon or chemical specific).

HOT ROLLED HOT ROLLED HOT ROLLED

The system for HOT ROLLED and COLD ROLLED coil and sheet productidentification, is normally composed of several elements expressed in the following order:

HOT ROLLED Main Product Designators:PREFIX “H” (ex AS 1594)

The Steel Type DesignatorA = Aluminium killedK = Silicon / Aluminium killedU = Unspecified steel type

The system for HOT ROLLED and COLD ROLLED coil and sheet productThe system for HOT ROLLED and COLD ROLLED coil and sheet productidentification, is normally composed of several elements expressidentification, is normally composed of several elements expressed in ed in the following order: the following order:

HOT ROLLED Main Product Designators:HOT ROLLED Main Product Designators:PREFIX PREFIX ““HH”” (ex AS 1594)(ex AS 1594)

The Steel Type DesignatorThe Steel Type DesignatorA = Aluminium killedA = Aluminium killedK = Silicon / Aluminium killedK = Silicon / Aluminium killedU = Unspecified steel typeU = Unspecified steel type

HOT ROLLED cont.HOT ROLLED cont.HOT ROLLED cont.

HOT ROLLED GRADES

The Formability Indicator1 = Commercial Forming2 = Commercial Drawing3 = Deep DrawingXF = Extra Formable200 to 500 Mpa for Guaranteed Strength minimums

HOT ROLLED GRADESHOT ROLLED GRADES

The Formability IndicatorThe Formability Indicator1 = Commercial Forming1 = Commercial Forming2 = Commercial Drawing2 = Commercial Drawing3 = Deep Drawing3 = Deep DrawingXF = Extra FormableXF = Extra Formable200 to 500 200 to 500 MpaMpa forfor Guaranteed Strength minimumsGuaranteed Strength minimums

HOT ROLLED cont.HOT ROLLED cont.HOT ROLLED cont.

Extra CharacteristicsS = Skin PassedP = PickledO = Oiled

Four digits indicates Composition Grades.

Example:HA3-P = Hot Rolled , Aluminium killed, Deep Drawing and Pickled.

Extra CharacteristicsExtra CharacteristicsS = Skin PassedS = Skin PassedP = PickledP = PickledO = OiledO = Oiled

Four digits indicates Composition GradesFour digits indicates Composition Grades..

Example:Example:HA3HA3--P = Hot Rolled , Aluminium killed, Deep Drawing and PickledP = Hot Rolled , Aluminium killed, Deep Drawing and Pickled..

COLD ROLLED COLD ROLLED COLD ROLLED COLD ROLLED Main Product Designators: COLD ROLLED Main Product Designators: COLD ROLLED Main Product Designators: PREFIX “C” (ex AS 1595)

The Steel Type DesignatorA = Aluminium killedK = Silicon / Aluminium killedU = Unspecified steel typeM = Modified with micro-alloy additionsV = Vitreous enameling steelW = Weathering steel

PREFIX PREFIX ““CC”” (ex AS 1595)(ex AS 1595)

The Steel Type DesignatorThe Steel Type DesignatorA = Aluminium killedA = Aluminium killedK = Silicon / Aluminium killedK = Silicon / Aluminium killedU = Unspecified steel typeU = Unspecified steel typeM = Modified with microM = Modified with micro--alloy additionsalloy additionsV = Vitreous enameling steelV = Vitreous enameling steelW = Weathering steelW = Weathering steel

COLD ROLLED cont.COLD ROLLED cont.COLD ROLLED cont.

COLD ROLLED GRADES

The Formability Indicator1 = Commercial Forming2 = Commercial Drawing3 = Deep Drawing4 = Extra Deep Drawing

COLD ROLLED GRADESCOLD ROLLED GRADES

The Formability IndicatorThe Formability Indicator1 = Commercial Forming1 = Commercial Forming2 = Commercial Drawing2 = Commercial Drawing3 = Deep Drawing3 = Deep Drawing4 = Extra Deep Drawing4 = Extra Deep Drawing

COLD ROLLED cont.COLD ROLLED cont.COLD ROLLED GRADESS = Skin PassedA = Annealed lastN = Non-Ageing (stabilised)G = General PurposeE = Exposed Panel Quality FinishF = Fully InspectedFour digits indicates Composition Grades

E.G. CA2SE = Cold Rolled, Aluminium killed, Commercial Drawing, Skin Passed and Exposed .

COLD ROLLED GRADESCOLD ROLLED GRADESS = Skin PassedS = Skin PassedA = Annealed lastA = Annealed lastN = NonN = Non--Ageing (Ageing (stabilisedstabilised))G = General PurposeG = General PurposeE = Exposed Panel Quality FinishE = Exposed Panel Quality FinishF = Fully InspectedF = Fully InspectedFour digits indicates Composition GradesFour digits indicates Composition Grades

E.G. CA2SE = Cold Rolled, Aluminium killed, Commercial Drawing, E.G. CA2SE = Cold Rolled, Aluminium killed, Commercial Drawing, Skin Passed and Exposed .Skin Passed and Exposed .

GENERAL PRODUCT GUIDEGENERAL PRODUCT GUIDEGENERAL PRODUCT GUIDEHOT ROLLED

PRODUCT BLACKFORM HA3-P XF400 HA250Finish SKIN PASSED PICKLED & AS ROLLED AS ROLLED

NON OILED OILEDBending VERY GOOD EXCELLENT EXCELLENT GOODRoll-forming VERY GOOD EXCELLENT EXCELLENT GOODPressing GOOD VERY GOOD GOOD MODERATEDrawing GOOD VERY GOOD GOOD MODERATEWelding EXCELLENT EXCELLENT EXCELLENT EXCELLENT

COLD ROLLEDPRODUCT CA2S-E CA3SN-E CA5SN-EFinish EXPOSED PANEL EXPOSED PANEL EXPOSED PANELBending EXCELLENT EXCELLENT EXCELLENTRoll-forming EXCELLENT EXCELLENT EXCELLENTPressing GOOD EXCELLENT EXCELLENTDrawing GOOD VERYGOOD EXCELLENTWelding EXCELLENT EXCELLENT EXCELLENT

HOT ROLLEDHOT ROLLEDPRODUCT PRODUCT BLACKFORMBLACKFORM HA3HA3--P P XF400XF400 HA2HA25500FinishFinish SKIN PASSED PICKLED & AS ROLLEDSKIN PASSED PICKLED & AS ROLLED AS ROLLEDAS ROLLED

NON OILED OILEDNON OILED OILEDBendingBending VERY GOOD EXCELLENTVERY GOOD EXCELLENT EXCELLENTEXCELLENT GOODGOODRollRoll--forming VERY GOOD EXCELLENTforming VERY GOOD EXCELLENT EXCELLENTEXCELLENT GOODGOODPressingPressing GOODGOOD VERY GOODVERY GOOD GOOD MODERATEGOOD MODERATEDrawingDrawing GOODGOOD VERY GOODVERY GOOD GOOD MODERATEGOOD MODERATEWeldingWelding EXCELLENT EXCELLENTEXCELLENT EXCELLENT EXCELLENTEXCELLENT EXCELLENTEXCELLENT

COLD ROLLEDCOLD ROLLEDPRODUCTPRODUCT CA2SCA2S--E E CA3SNCA3SN--E E CA5SNCA5SN--EEFinishFinish EXPOSED PANEL EXPOSED PANEL EXPOEXPOSED PANEL EXPOSED PANEL EXPOSED PANELSED PANELBendingBending EXCELLENT EXCELLENT EXCELLENT EXCELLENT EXCELLENTEXCELLENTRollRoll--forming EXCELLENT EXCELLENT forming EXCELLENT EXCELLENT EXCELLENTEXCELLENTPressing GOODPressing GOOD EXCELLENT EXCELLENT EXCELLENTEXCELLENTDrawing Drawing GOODGOOD VERYGOOD VERYGOOD EXCELLENTEXCELLENTWelding EXCELLENTWelding EXCELLENT EXCELLENT EXCELLENTEXCELLENT EXCELLENT

COATED PRODUCT DESIGNATION

COATED PRODUCT COATED PRODUCT DESIGNATIONDESIGNATION

Commercial coated product is separated in two group types

1. FORMABLE

2. STRUCTURAL

Commercial coated product is Commercial coated product is separated in two group types separated in two group types

1. FORMABLE 1. FORMABLE

2. STRUCTURAL2. STRUCTURAL

(a) Main Coated Product Designators:

Zinc Coated Aluminium/Zinc CoatedZINCFORM® ZINC-HI-TEN® High TensileGalv

ZINCALUME®GALVALUME® Aluzinc

GALVASPAN®Galvaskin

Zinc Aluminium Coated

GALVABOND®Galvanised ZincmatteZINCSEAL®Electro GalvZINCANNEAL ®Galvanneal• ® = Trademark registered by BHP group of companies.

PRODUCT DESIGNATION contPRODUCT DESIGNATION cont..

(b) The Strength Designator

Base Steel Type Minimum Yield Strength (MPa) G-Continuously heat treated and hot-dip coated

A number indicating strength in Megapascals

(c) The Coating Class

Zinc Coating Total Grams / Metre Square Z = Zinc AZ = Aluminium Zinc ZF = Zinc + Iron

A number indicating total weight of coating.

Example: Zinc Hi-Ten G450Z350 = Continuously heat treated and hot-dip coated Zinc coated product with a minimum strength of 450Mpa and a nominal total coating of Zinc weighing 350-grams/square metre. (175 grams OF COATING each side).

PRODUCT DESIGNATION cont.PRODUCT DESIGNATION cont.

BHP Formable grades are identified by a second character, (G1, G2, orG3) to indicate progressively better formability, and sometimes a letter to signify additional specifications 1 = Profiling grade N = Non ageing 2 = Commercial forming S = Skin passed 3 = Drawing A = Annealed EG: G2 Z275 = Commercial Forming quality, with a total coating of 275grams/ square metre. “Standard grade” Galvanised sheet and coil product stocked by Smorgon Sheet Metal Supplies is;

G2 Z275

PRODUCT DESIGNATION contPRODUCT DESIGNATION cont..

C0ATING DESIGNATIONC0ATING DESIGNATIONC0ATING DESIGNATION

Z - pure zinc (Zn)

ZF- zinc plus iron (Zn + Fe)

AZ- aluminium and zinc (Al + Zn)

ZZ -- pure zinc (Zn)pure zinc (Zn)

ZFZF-- zinc plus iron (Zn + Fe)zinc plus iron (Zn + Fe)

AZAZ-- aluminium and zinc (Al + Zn)aluminium and zinc (Al + Zn)

C0ATING DESIGNATION cont.C0ATING DESIGNATION cont.C0ATING DESIGNATION cont.

2 functions of barrier protection:- physical- sacrificial

MAIN CLASSES:Z100, Z220 Z275, Z350, Z450, Z600ZF30, ZF100AZ150, AZ200

2 functions of barrier protection:2 functions of barrier protection:-- physicalphysical-- sacrificial sacrificial

MAIN CLASSES:MAIN CLASSES:Z100, Z220 Z275, Z350, Z450, Z600Z100, Z220 Z275, Z350, Z450, Z600ZF30, ZF100ZF30, ZF100AZ150, AZ200AZ150, AZ200

C0ATING DESIGNATION cont.C0ATING DESIGNATION cont.C0ATING DESIGNATION cont.Total Coating Thickness:

Z275 - 0.04mmZ350 - 0.05mmZ450 - 0.07mmZ600 - 0.09/ 0.10mm (2.0mm)ZF30 - 0.01mmZF100 - 0.02mmAZ150 - 0.05mmAZ200 - 0.06mm

Total Total CoatingCoating Thickness:Thickness:

Z275Z275 -- 0.04mm0.04mmZ350Z350 -- 0.05mm0.05mmZ450 Z450 -- 0.07mm0.07mmZ600 Z600 -- 0.09/ 0.10mm (2.0mm)0.09/ 0.10mm (2.0mm)ZF30ZF30 -- 0.01mm0.01mmZF100ZF100 -- 0.02mm0.02mmAZ150AZ150 -- 0.05mm0.05mmAZ200AZ200 -- 0.06mm 0.06mm

C0ATING DESIGNATION cont.C0ATING DESIGNATION cont.C0ATING DESIGNATION cont.

Atmospheric Corrosion Rates:Microns / year:Environment Galv Zincalume®Severe marine 9.8 2.2Marine 1.3 0.54Industrial/ marine 1.4 0.57Rural 0.28 0.17

Atmospheric Corrosion Rates:Atmospheric Corrosion Rates:Microns / year:Microns / year:EnvironmentEnvironment GalvGalv ZincalumeZincalume®®Severe marineSevere marine 9.89.8 2.22.2MarineMarine 1.31.3 0.540.54Industrial/ marineIndustrial/ marine 1.41.4 0.570.57Rural Rural 0.280.28 0.170.17

MINIMUM BEND ABILITYMINIMUM BEND ABILITYMEASURE OF MEASURE OF ““TT”” BENDBEND

BEND AREA

MATERIAL THICKNESS “T” WIDTH

““TT””= The number of times the material = The number of times the material thickness would fit into the space, when thickness would fit into the space, when the material is folded back on itself. the material is folded back on itself.

MINIMUM BEND ABILITYMINIMUM BEND ABILITYMINIMUM BEND ABILITYBending requirements: Coating (T bend)Grade Z AZ

100 200 275 350 450 600 150 200G2 0 0 0 0 1 2 0 1G300 0 0 0 0 1 2 1 1G450 0 1 2 2 2 3 2 2G500 1 2 2 2 2 3 2 2G550 1 2 2 2 2 3 2 2

Bending requirements: Coating (T bend)Bending requirements: Coating (T bend)GradeGrade ZZ AZAZ

100 200 275 350 450 600 150 200100 200 275 350 450 600 150 200G2G2 0 0 00 0 0 0 1 2 0 10 1 2 0 1G300G300 0 0 0 0 1 2 1 10 0 0 0 1 2 1 1G450G450 0 1 2 2 2 3 2 20 1 2 2 2 3 2 2G500G500 1 2 2 2 2 3 2 21 2 2 2 2 3 2 2G550G550 1 2 2 2 2 3 2 21 2 2 2 2 3 2 2

TOTAL COATED THICKNESSTOTAL COATED THICKNESS

= The total thickness of the base steel + the coating on both sides.= The total thickness of the base steel + the coating = The total thickness of the base steel + the coating on both sides.on both sides.

Metallic coatingMetallic coating

Metallic coatingMetallic coating

Base steelBase steel

= = TOTAL COATED THICKNESS TOTAL COATED THICKNESS OR OR T.C.T.T.C.T.

IMPERIAL SIZES IMPERIAL SIZES PRODUCT GUIDE PRODUCT GUIDE SHEET AND COIL.SHEET AND COIL.

IMPERIAL SIZESIMPERIAL SIZESGAUGE

NUMBER BIRMINGHAM

GAUGEUS MANFS.

STDBIRMINGHAM WIRE GAUGE

IMPERIAL STANDARD

US STEEL WIRE GAUGE

10 3.18 3.42 3.41 3.26 3.4312 2.52 2.66 2.77 2.65 2.6814 2.00 1.90 2.11 2.04 2.0416 1.59 1.53 1.66 1.63 1.5918 1.26 1.21 1.25 1.22 1.2120 1.00 0.92 0.89 0.92 0.8922 0.80 0.77 0.72 0.72 0.7324 0.63 0.61 0.56 0.56 0.5926 0.50 0.46 0.46 0.46 0.4628 0.40 0.38 0.36 0.38 0.42

*TABLE SHOWS EQUIVILANT THICKNESS IN MM.

IMPERIAL SIZESIMPERIAL SIZESIMPERIAL SIZE TO METRIC MILLIMETRES

3 FEET (914mm) Supplied as 900mm or 915mm

4 FEET (1219mm) Supplied as 1200mm or 1220m

5 FEET (1524mm) Supplied as 1500mm or 1525m

6 FEET (1829mm) Supplied as 1800mm or 1830m

8 FEET (2438mm) Supplied as 2400mm or 2440m

10 FEET (3048mm) Supplied as 3000mm or 3050m

12 FEET (3658mm) Supplied as 3600mm or 3660m

QUICK QUIZQUICK QUIZ

1. What is the standard Hot Rolled grade sheet 1. What is the standard Hot Rolled grade sheet and coil stocked by SSMS?and coil stocked by SSMS?

2. What does 2. What does ““T.C.TT.C.T”” stand for?stand for?

3. What type of Colorbond3. What type of Colorbond®® is used inis used in(a) roofing (b) signs?(a) roofing (b) signs?

4. A customer rings seeking prices on Zinc sheet.4. A customer rings seeking prices on Zinc sheet.What product are they asking for?What product are they asking for?

QUICK QUIZ ANSWERSQUICK QUIZ ANSWERS

1. 1. BLACKFORMBLACKFORM®®..

2. TOTAL COATED THICKNESS.2. TOTAL COATED THICKNESS.

3. (a) XRW 3. (a) XRW –– EXTERIOR ROOF AND WALLINGEXTERIOR ROOF AND WALLING(b) SWP (b) SWP –– SIGN WRITING PANEL.SIGN WRITING PANEL.

4. WHO KNOWS? (Ask the right questions to 4. WHO KNOWS? (Ask the right questions to clarify).clarify).

ASKING THE RIGHT QUESTIONS. ASKING THE RIGHT QUESTIONS. A QUICK SELLING GUIDEA QUICK SELLING GUIDE

WHAT IS THE WHAT IS THE REQUIREDREQUIRED SPECIFICATION?SPECIFICATION?

WHAT IS THE PRODUCT GOING TO BE USED FOR?WHAT IS THE PRODUCT GOING TO BE USED FOR?

WHAT PROCESSES WILL TAKE PLACE TO THE WHAT PROCESSES WILL TAKE PLACE TO THE PRODUCT?PRODUCT?

WHAT QUALITY IS REQUIRED TO ACHIEVE THAT?WHAT QUALITY IS REQUIRED TO ACHIEVE THAT?

WHAT COULD BE OFFERED AS AN ALTERNATIVE?WHAT COULD BE OFFERED AS AN ALTERNATIVE?

SHEET AND COIL SHEET AND COIL CALCULATIONSCALCULATIONS

CALCULATIONS QUIZCALCULATIONS QUIZ1. How many sheets per tonne are there for 1. How many sheets per tonne are there for

0.90mm BMT X 1200mm X 2400mm 0.90mm BMT X 1200mm X 2400mm AluzincAluzinc ? ?

2. What length is a coil of 0.70mm BMT X 145mm 2. What length is a coil of 0.70mm BMT X 145mm Galv Z275 weighing 1114 kilograms ?Galv Z275 weighing 1114 kilograms ?

3. How much weight is in a coil of 3.00mm X 3. How much weight is in a coil of 3.00mm X 1200mm Hot Rolled , 350 metres long ?1200mm Hot Rolled , 350 metres long ?

4. (a) How much weight is in a pack of 57 sheets 4. (a) How much weight is in a pack of 57 sheets 1.60mm X 240mm X 1720mm Hot Rolled ?1.60mm X 240mm X 1720mm Hot Rolled ?(b)How many sheets per tonne are there ?(b)How many sheets per tonne are there ?

CALCULATIONS QUIZCALCULATIONS QUIZ

1.1. How many sheets per tonne are there for 0.90 mm How many sheets per tonne are there for 0.90 mm BMT X 1200mm X 2400mm BMT X 1200mm X 2400mm AluzincAluzinc??

SHEETS PER TONNE = SHEETS PER TONNE =

METRESMETRES²² / TONNE / TONNE ÷÷ WIDTH IN METRES WIDTH IN METRES ÷÷ LENGTH IN METRESLENGTH IN METRES

= 138.22 METRES138.22 METRES²² / TONNE / TONNE ÷÷ 1.2 METRES 1.2 METRES ÷÷ 2.4 METRES2.4 METRES

= 47.99 SHEETS PER TONNE47.99 SHEETS PER TONNE

== 48 SHEETS PER TONNE48 SHEETS PER TONNE

CALCULATIONS QUIZCALCULATIONS QUIZ2. What length is a coil of 0.70mm BMT X 145mm 2. What length is a coil of 0.70mm BMT X 145mm

GalvGalv Z275 weighing 1114 kilograms?Z275 weighing 1114 kilograms?

COIL LENGTH IN METRESCOIL LENGTH IN METRES = =

METRESMETRES²² / TONNE / TONNE ÷÷ WIDTH IN METRES X WEIGHT IN TONNESWIDTH IN METRES X WEIGHT IN TONNES

= 172.86 METRES172.86 METRES²² / TONNE / TONNE ÷÷ 0.145 METRES X 1.114 TONNES0.145 METRES X 1.114 TONNES

= 1328.04 METRES1328.04 METRES

== 1328 METRES1328 METRES

CALCULATIONS QUIZCALCULATIONS QUIZ3. How much weight is in a coil of 3.00mm X 1200mm 3. How much weight is in a coil of 3.00mm X 1200mm

Hot Rolled , 350 metres long ?Hot Rolled , 350 metres long ?

COIL WEIGHT IN TONNESCOIL WEIGHT IN TONNES = =

LENGTH IN METRES X WIDTH IN METRES LENGTH IN METRES X WIDTH IN METRES ÷÷ METRESMETRES²² / TONNE/ TONNE

= 350 METRES LONG X 1.2 METRES WIDE ÷ 42.46 METRES² / TONNE/ TONNE

= 9.8916 TONNES9.8916 TONNES

== 9.892 TONNES9.892 TONNES

CALCULATIONS QUIZCALCULATIONS QUIZ4. (a) How much weight is in a pack of 57 sheets 4. (a) How much weight is in a pack of 57 sheets

1.60mm X 240mm X 1720mm Hot Rolled ?1.60mm X 240mm X 1720mm Hot Rolled ?(b)How many sheets per tonne are there ? (b)How many sheets per tonne are there ?

(a) 57 SHEETS X 1.72 METRES LONG = 98.04 METRES(a) 57 SHEETS X 1.72 METRES LONG = 98.04 METRES

PACK WEIGHT=PACK WEIGHT=LENGTH IN METRES X WIDTH IN METRES LENGTH IN METRES X WIDTH IN METRES ÷÷ METRESMETRES²² / TONNE/ TONNE= 98.0498.04 METRES X 0.24 METRES WIDE ÷ 79.62 METRES² / TONNE/ TONNE= 0.2955 TONNES0.2955 TONNES== 0.296 TONNES0.296 TONNES

(b) (b) SHEETS PER TONNE = SHEETS PER TONNE = METRESMETRES²² / TONNE / TONNE ÷÷ WIDTH IN METRES WIDTH IN METRES ÷÷ LENGTH IN METRESLENGTH IN METRES= 79.62 METRES79.62 METRES²² / TONNE / TONNE ÷÷ 0.240 METRES 0.240 METRES ÷÷ 1.720 METRES1.720 METRES= 192.877192.877 SHEETS PER TONNESHEETS PER TONNE== 193 SHEETS PER TONNE193 SHEETS PER TONNE