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