8 Klasifikasi Baja

7/21/2019 8 Klasifikasi Baja

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METALURGI IIBaja Karbon, Klasifikasi Baja Karbon

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FERROUS ALLOYS




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Grouping of Steel, base on….

• Komposisi kimia

Plain carbon steel (non-Alloyed Steel !a"a Karbon renda# !a"a karbon menenga# !a"a Karbon tinggi

!a"a Paduan (Alloyed Steel $o% Alloy steel &ig# Alloy steel

• Struktur MikroFerritic, Martensitik, austenitik

• Bentuk Produk bar, plat, strip, wire, profle

• Metode produksi

Hot rolled, cold rolled• Deoxidasi

Killed, semi killed• Kekuatan Tarik ,

&S$A, '&SS,• Metode Perlakuan Panas/Penuatan

Temperin, !arburi"in, nitridin, PH




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!asic Steel lassi)cation

• Plain (non Alloyedarbon steel *ika

(Smit#,+a/imum elemenanganese +0

Sulfur 1.120

P#osp#orus 1,130

Silicon 1,10

• Ba#a Paduan $enda% &low 'llo(Steel) prosentase Paduan

Total paduan *+ &-a(ar,..)

'l0,1

!r 0,1

!o0,1

Mo0,2

-i0,3 &'STM)

4lemen masin5masin lebi%dari ,6

• &ig# Alloy Steel 4otal paduan lebi# dari 20




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Carbon Content Alloy Content

Low-carbon steels

(≤ 0.25 wt.%!

"la#n-carbon steels (no allo$#n ele&ent e'cet Mn ) to 1.*5 wt.%!

Me+#)&-carbonsteels

(0.25 - 0.55 wt.%!

Low-allo$ steels (total allo$ content , 5 wt.%!

#-carbon steels(/ 0.55 wt.%!

#-allo$ steels (total allo$ content / 5 wt.%! - Tool steels an+ sta#nless steels

Steel- Classification According to Carbon content Composition




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E'a&le- lass##cat#on accor+#n to M#crostr)ct)re




$o% Alloy &ig# Alloylo% carbon51.62%t0

med carbon1.62-1.7%t0

#ig# carbon1.7-+.3%t0

'ses autostruc.s#eet

bridgesto%erspress.8essels

cranks#aftsbolts#ammersblades

pistonsgears%earapplic.

%earapplic.

drillssa%sdies

#ig# 4applic.turbinesfurnaces9. corros.resistant

:/ample +1+1 3+1 +131 331 +12 3+1 13

Additions noner,9;i, o

noner, ;io

noner, 9,o, <

r, ;i, o

plain &S$A plain#eat

treatableplain tool

austentiticstainless

;ame

&ardenability 1 = = == == === 1 4S - 1 = == = == 1:$

= = 1 - - -- ==

increasing strengt#, cost, decreasing ductility

Steel




Kodi)kasi !a"a (Steel >esignation

• A?S?, American ?ron Steel ?nstitute

• AS4, American Standard for 4esting and aterial

• >?;, >eutsc#es ?nstitut fur ;ormung

• *?S, *apanese ?ndustrial Standard• :;, ommittee :uropean de ;ormali@ation

• ?S, ?nternational Standardi@ation rgani@ation

• SA:, Society for Automoti8e :ngineering

• ;B, Association francaise de normali@ation (AB;C

• ';S ('ni)ed ;umbering System , SA: and AS4




A?S?-SA: (prinsipal"la#n arbon(non-allo$e+ steel! Allo$e+ steel!




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7-S

• G3+11

c#romiumSteel

about 1, 0carbon

• K3+311

UNS Descriptor Ferros Metals

Dxxxxx Specified mechanical Properties SteelFxxxxx Cast irons

Gxxxxx SAE and Former Carbon Alloy steel(ex toolSteel)

Hxxxxx AISI H steel

xxxxx Cast Steel

!xxxxx "iscellaneo#s steels and ferro#s alloy

Sxxxxx Heat and corrosion resistant (stainless)steel

$xxxxx $ool steel

UNS Descriptor %eldin& filler metal

%xxxxx %eldin& filler "etal' coered And t#b#larelectrode Classified




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$o% Alloy Steel

• >igit Pertama merupakan "umla#relatif (4ela# dikalikan +11

• >igit berikutnya menun"ukkankomposisi paduan, tergantung>ari "enis paduan

onto# D

;ikel c#romium steel, dengan

komposisi 1,63 0, ,2 0;ikel, 1,E #romium

D8- .9!r-i69

Baaimana Denan

.!r 9 ::

Hi% 'llo( Steel

; 6!r -i 622,,6 !, 62 !r, 2 -i

;6!r-i-b62<

,6!, 62!r, 2-i, ada

paduan -b

Pad#an Fator Pen&ali

Cromi#m' Cobalt' "an&anese ' *iel'Silicon

+

Al#mini#m' boron' C#pper'"olibden#m' *iobi#m'$itani#m'anadi#m

,-

Phosphor#s' S#lf#r' *ito&en' Carbon ,--

DI




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AS!" System

ATM wr#tes stan+ar+ specifications or ar#o)s allo$s to &eet. Te ATM stan+ar+

coers chemical compositions, mechanical property limits or levels, fabrication

methods, and heat treatments. Alloys are required to satisfy these requirements .6or e'a&le7 steel lates )se+ or str)ct)ral an+ ress)re essel +es#ns are &ostl$

class##e+ accor+#n ATM stan+ar+s.

8An AS!" designation is an arbitrarily c#osen n$mber pre-fi%ed by t#e letter &A&'

Specification Steel type and condition

A3* A131 A23 A24

A440 A52

A53

A* A0

arbon steel lates7 bars an+ saesarbon an+ LA steel lates7 bars7 saes an+ r#ets or s#sarbon steel lates o low or #nter&e+#ate tens#le strentarbon-s#l#con steel lates o low or #nter&e+#ate tens#le strent or &ac#nearts an+ eneral constr)ct#onarbon steel lates7 bars an+ saes o # tens#le strentarbon steel lates7 bars7 saes an+ seet #l#n w#t 20 M"a (42 9s#!&#n#&)& $#el+ o#ntarbon steel lates or al#cat#ons re:)#r#n to)ness at at&oser#cte&erat)res;)ence+ an+ te&ere+ carbon steel latesarbon7 allo$ an+ LA steel lates7 bars an+ saes or br#+es




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1

*?S




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1




20

AME




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Plain arbon Steel

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8 Klasifikasi Baja