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KANTHAL APMT™ material presentation
Roger Berglund Sandvik Materials Technology
Sandvik Materials TechnologyKANTHAL APMT™ material presentation
Sandvik Group – a global leaderThree business areas
InvoicingMSEK
Employees
19 078 32 621 15 328
15 296 14 429 8 246
31 Dec. 2009
Sandvik Tooling
SandvikMining and
Construction
SandvikMaterials
Technology
Sandvik Materials TechnologyKANTHAL APMT™ material presentation
SANDVIK GROUP
Sandvik ToolingTools and tooling systems for metal cutting, blanks and components.
Sandvik Mining & ConstructionEquipment, tools and services for mining and construction.
Sandvik Materials TechnologyStainless steel and special alloy products for niche applications, resistance materials and steel belt process systems.
Tube Strip Wire and HeatingTechnology
Sandvik Process Systems
Sandvik MedTech
Business Areas:
Product Areas:
Sandvik Group – organizational structure
Sandvik Materials TechnologyKANTHAL APMT™ material presentation
Alumina scale on FeCrAl Alloys
α-alumina Al2 O3
Thermodynamically stable
Non-volatile
Inert
Dense
Thin
Slow growth
Adherent
Surface
Cross Section
Reactive Element (RE) effect!
Sandvik Materials TechnologyKANTHAL APMT™ material presentation
Conventional vs RSP FeCrAl
Conventional FeCrAl alloysSevere elongation and deformation
RSP FeCrAl (KANTHAL APM)Form stability and low elongation
Ø9,5 mm wire heaters after 500 h at 1300-1400°C (2372-2552°F)
Sandvik Materials TechnologyKANTHAL APMT™ material presentation
Creep Strength& Price
RSP KANTHAL APMT™ Alloy
Conventional Metallurgy (ex. KANTHAL A-1)
RSP FeCrAl Alloys (KANTHAL APM)
ODS MA FeCrAl Alloys
Development of Creep Resistant FeCrAl-alloys
Sandvik Materials TechnologyKANTHAL APMT™ material presentation
PM based KANTHAL alloysComposition �(wt%) Fe Cr Al Mo Si Mn C Minor
additions
KANTHAL APM Bal. 22 5.8 <0.7 <0.4 <0.05 Present
KANTHAL APMT Bal. 22 5.0 3.0 <0.7 <0.4 <0.05 Present
0,1
1
10
100
700 800 900 1000 1100 1200 1300 1400Temperature [°C]
Stre
ss [M
Pa]
Fe35Ni25Cr
Alloy 800HT
Alloy 601
Kanthal APM
Kanthal APMT
10 000 h Creep Rupture Strength
Sandvik Materials TechnologyKANTHAL APMT™ material presentation
Production of PM HIP:ed materials
Sandvik Materials TechnologyKANTHAL APMT™ material presentation
Process Route for Tubes
Powder bygas atomisation
Fillingof Capsule HIP Hot
ExtrusionPickling
(Preoxidation)Machining
of Billet
Sandvik Materials TechnologyKANTHAL APMT™ material presentation
Grain Structure Kanthal APMT tubes
Delivery State Creep tested at 1200ºC, 2000h
Cross Section
Grain Stability
Sandvik Materials TechnologyKANTHAL APMT™ material presentation
Dispersion in Kanthal APMT tube
TEM, Bright Field Image
Average Particle Size: 75 nmAverage Particle Density: 12 µm-3
Sandvik Materials TechnologyKANTHAL APMT™ material presentation
Overheating
APMT can withstand temperature trips of 24h at 2282°F with Creep Properties maintained !
Creep Strenght 2012°F / 1.16 kpsi - Impact of Overheating 24 hours
0
20
40
60
80
100
2192 2282 2372 2462 2552
Temperature [°F]
Rem
aine
d C
reep
Life
[%]
Sandvik Materials TechnologyKANTHAL APMT™ material presentation
1
10
100
1,00E-10 1,00E-09 1,00E-08 1,00E-07 1,00E-06 1,00E-05
Creep rate [s-1]
Stre
ss (M
Pa)
800°C
900°C
1100°C
1200°C
KANTHAL APM Tube 1100ºC
KANTHAL APMT Sec. Creep Rate
6 times higher load>1000 times slower creep
Sandvik Materials TechnologyKANTHAL APMT™ material presentation
Gravitational deflection of horizontal tubes
0,000,200,40
0,600,801,001,201,401,601,802,00
-1000 -500 0 500 1000Distance from centre [mm]
Def
lect
ion
[mm
]
APMTAPM
Fe35Ni25CrKANTHAL APMT
Sandvik Materials TechnologyKANTHAL APMT™ material presentation
Oxide spallation.
Fe35Ni25CrKANTHAL APMT
AluminaChromia
Sandvik Materials TechnologyKANTHAL APMT™ material presentation
KANTHAL APMT is weldable if WPS is followed.Recommended methods TIG (GTAW), laser weldingPreheating and PWHT is necessary.APMT filler is recommended.
However a loss of creep strength is unaviodable due to remelting of RSP structure.
Solid state welding techniques are being evaluated.Vacuum brazing also possible.
Joining techniques
Sandvik Materials TechnologyKANTHAL APMT™ material presentation
Applications for KANTHAL APMT
Ethylene tubes
Furnace rollers
Furnace furniture
Wire mesh belts
Radiant tubes
Sandvik Materials TechnologyKANTHAL APMT™ material presentation
KANTHAL APMT applications
Loading cage rings for HIP presses.
Sandvik Materials TechnologyKANTHAL APMT™ material presentation
KANTHAL APMT product formsWire and strip
Hot rolled•Billets, •Bars, •Rod, •Profiles•Rings
NNS HIP components
Fabricated components/productsExtruded tubes•Radiant tubes,•Muffle tubes,•Ethylene tubes.
Sandvik Materials TechnologyKANTHAL APMT™ material presentation
Fore more information
www.kanthal.com
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