klasifikasi material besi
TRANSCRIPT
Klasifikasi Material
Myrna AriatiWahyuaji Narottama Putra
Klasifikasi Material
Ferrous Alloys
Cast Iron
1. White Cast Iron
2. Grey Cast Iron (FC)
3. Mallable Cast Iron
4. Ductile Cast Iron (FCD)
5. Austempered Ductile Iron (ADI)
Matrix: Ferritic, pearlitic, austenitic, martensitic, bainitic (austempered).
Tipe Besi Tuang
Komposisi Besi TuangUtama : Fe (besi)
Paduan : C (karbon) = 2.75 – 4.00% Si (silikon) = 0.75 – 3.00% Mn (mangan) = 0.25 – 1.50%
P (posfor) = 0.02 – 0.75% S (sulfur) = 0.02 – 0.2%
Carbon Equivelent : CE (%) = C (%) + 0,33 (Si + P) %
Komposisi Besi Tuang
Komposisi Besi Tuang
Sifat Mekanik Besi TuangUTS (Kg/mm2) Elongasi (%)
Grey Cast Iron(FC) 10 – 35 < 1
Mallable Cast Iron 40 – 47 15 – 20
Nodular Cast Iron (FCD) 45 – 55 3 – 20
Austempered Ductile Iron (ADI)
> 100 4 – 7
Vermicular (Compacted Graphite) Cast Iron
30 - 40 2 - 5
Klasifikasi Besi Tuang Kelabu
Klasifikasi Besi Tuang Kelabu
Class Symbol UTS (kg/mm2)
Hardness (HB)
Class 1 FC 10 10 min 201 max
Class 2 FC 15 15 min 212 max
Class 3 FC 20 20 min 223 max
Class 4 FC 25 25 min 241 max
Class 5 FC 30 30 min 262 max
Class 6 FC 35 35 min 277 max
Klasifikasi Besi Tuang Nodular
Klasifikasi Austempered Ductile Iron
Ferrous Alloys
Carbon Steel
Klasifikasi Baja
A = alloy, basic open hearth
B = carbon, acid Bessemer
C = carbon, basic open hearth
D = carbon, acid open hearth
E = electric furnace
Contoh: AISI C1050 adalah baja karbon, basic-open hearth steel dg 0.50 % karbon
Huruf lain adalah H-Hardenability Contoh; 4340H
Klasifikasi Baja Paduan
Klasifikasi Baja Paduan
Klasifikasi Baja Paduan
Klasifikasi Baja Paduan
Ferrous Alloys
Stainless Steel
Family of Stainless Steel
Properties of Stainless SteelAlloy Group Magnetic
Response1
Work Hardening Rate
Corrosion Resistance2
Hardenable
Austenitic Generally No Very High High By Cold Work
Duplex Yes Medium Very High No
Ferritic Yes Medium Medium No
Martensitic Yes Medium Medium Quench & Temper
Precipitation Hardening Yes Medium Medium Age Harden
Alloy Group DuctilityHigh
Temperature Resistance
Low Temperature Resistance3 Weldability
Austenitic Very High Very High Very High Very High
Duplex Medium Low Medium High
Ferritic Medium High Low Low
Martensitic Low Low Low Low
Precipitation Hardening Medium Low Low High
Austenitic SS
Ferritic SS
Martensitic SS
Duplex SS
Ferrous Alloys
Tool Steel
Klasifikasi Tool Steel
Klasifikasi Tool Steel
Tipe Tool Steel
Tipe Tool Steel
Non Ferrous
Aluminium Alloys
Klasifikasi Aluminium Alloys
Klasifikasi Aluminium Alloys
Klasifikasi Aluminium Alloys
Klasifikasi Aluminium Alloys
Klasifikasi Aluminium Alloys
Perlakuan Panas Aluminium
Perlakuan Panas Aluminium
Perlakuan Panas Aluminium
Perlakuan Panas Aluminium
Non Ferrous
Magnesium Alloys
Klasifikasi Paduan Magnesium
AZ91C-T6
2 huruf
Elemen paduan utama
A = aluminium
Z = zinc
2 angka
Jumlah paduan utama
9 = 9% Al
1 = 1% Zn
Klasifikasi Temper
-T6 = solution treatmen dan pemanasan aging
1 huruf
Paduan lain
C = Paduan ketiga
Kode-kode penandaan ASTM
A - Aluminium E - Rare earths H - Thorium K - Zirconium M - Manganese Q - Silver T - Tin Z - Zinc
F - As fabricated O - Annealed H10 and H11 - slightly strain hard H23, H24, H26 - strain hardened and
partially annealed T4 - artificially aged T6 - Solution treat, aged T8 - Solution treat, cold work, aged
Contoh Magnesium Alloys AZ91C-T6: 9Al-0.7Zn-0.13Mn
Kekuatan menengah (91 MPa yield, 275 MPa tensile), keuletan baik
K1A: 1Zr Kapasitas redam tinggi
QH21A: 2.5Ag-1Th-0.7Zr Komponen pesawat udara untuk hingga 250˚C 207 MPa yield, 275 MPa tensile
Contoh Magnesium Alloys AZ91B-F
Paduan untuk proses die casting
AM60A-F Roda automotive, ketangguhan baik, kekuatan baik.
AS41A-F Ketahanan creep baik hingga 175˚C
Contoh Magnesium Alloys AZ31B-F
Batang ekstrusi dan dibentuk untuk komponen baterai, sifat mekanis menengah jika digunakan untuk struktur.
HK31A-H24 Sheet and plate , yield stress 205 MPa dan UTS 260 MPa, mampu las amat
baik.
Contoh Magnesium Alloys
Contoh Sifat Magnesium Alloys
Unified Number System (UNS)
Metals & Alloys
Unified Number System