GH4169 Powder for Additive Manufacturing

GH4169 powder is a precipitation hardening stainless steel powder designed to provide high strength, hardness and corrosion resistance after heat treatment. It contains 17% chromium along with nickel, aluminum, titanium, and niobium additions for enhanced mechanical and corrosion properties.

Key characteristics of GH4169 powder:

GH4169 Powder Properties

Fastigheter	Detaljer
Sammansättning	Fe-17Cr-4Ni-1.5Ti-0.7Al-0.25Nb alloy
Täthet	7,9 g/cc
Partikelns form	Oregelbunden, kantig
Storleksintervall	10-150 microns
Skenbar densitet	Upp till 50% av verklig densitet
Flytbarhet	Måttlig
Styrka	Mycket hög efter åldringsbehandling
Korrosionsbeständighet	Excellent, including marine environments

GH4169’s exceptional strength-to-weight ratio combined with outstanding corrosion resistance make it suitable for critical structural parts across aerospace, marine, nuclear and other demanding applications.

GH4169 Powder Composition

Typical composition of GH4169 precipitation hardening stainless steel:

GH4169 Powder Composition

Element	Vikt %
Järn (Fe)	Balans
Krom (Cr)	16-18%
Nickel (Ni)	3.5-5.5%
Titan (Ti)	1.2-1.8%
Aluminium (Al)	0.3-1.2%
Niobium (Nb)	0.15-0.45%
Kol (C)	0.04% max
Silicon (Si), Manganese (Mn)	1% max each

• Iron provides the ferritic matrix
• Chromium improves corrosion and oxidation resistance
• Nickel, aluminum, titanium and niobium facilitate precipitation hardening
• Carbon and other elements limited as tramp impurities

The composition is designed to maximize the precipitation hardening response and corrosion resistance required in structural applications.

GH4169 Powder Physical Properties

GH4169 Powder Physical Properties

Fastighet	Värden
Täthet	7,9 g/cc
Smältpunkt	1400-1450°C
Elektrisk resistivitet	0.80 μΩ-m
Termisk ledningsförmåga	12 W/mK
Termisk expansion	12 x 10^-6 /K
Maximal driftstemperatur	650°C

• Högt förhållande mellan styrka och vikt
• Retains strength and hardness up to 650°C
• Relatively low thermal conductivity
• Resistivity increases after precipitation hardening
• Moderate expansion coefficient

The properties allow use of GH4169 in load bearing structural applications requiring corrosion resistance and high temperature strength.

GH4169 Powder Mechanical Properties

GH4169 Powder Mechanical Properties

Fastighet	Skick	Värden
Hårdhet	Lösningsglödgad	90 HRB
Hårdhet	Högsta ålder	40-45 HRC
Draghållfasthet	Glödgad	550-750 MPa
Draghållfasthet	Högsta ålder	1300-1600 MPa
Sträckgräns	Högsta ålder	1100-1400 MPa
Töjning	Högsta ålder	8-13%

• Ages to high strength levels exceeding other precipitation hardening stainless steels
• Retains good ductility in peak aged condition
• Significant increase in hardness after aging treatment
• Styrkan kan skräddarsys genom mognadstid och temperatur

These properties make GH4169 suitable for lightweight, high strength structural parts needing corrosion resistance.

GH4169 Powder Applications

Typical applications for GH4169 precipitation hardening stainless steel powder include:

GH4169 Powder Applications

Industri	Exempel på användningsområden
Flyg- och rymdindustrin	Airframe and engine components, fasteners
Marin	Shafts, fixtures, solenoids, valves
Nuclear	Fuel element cladding, internal structures
Olja och gas	Structural parts for wellheads, offshore platforms
Kemisk	Process equipment like vessels and pipes

Några specifika användningsområden:

• Bolts, nuts, screws, and studs needing high strength
• Critical rotating shaft components
• Valve and pump bodies used in corrosive environments
• Mixing equipment like impellers and agitators
• Nuclear fuel element cladding and vessel internals

GH4169 provides an exceptional combination of strength, hardness and corrosion resistance required in critical structural parts across demanding industries.

GH4169 Powder Specifications

Key specifications for GH4169 powder include:

GH4169 Powder Standards

Standard	Beskrivning
AMS 5922	Precipitation hardening stainless steel powder for aerospace parts
ASTM A580	Standard for precipitation hardening stainless steel wire
ASTM A638	Standard for precipitation hardening iron-based superalloys
AMS 5898	Bars, forgings, rings of precipitation hardening stainless steels

Dessa definierar:

• Chemical composition of GH4169 alloy
• Permissible impurities like C, S and P
• Required mechanical properties in different conditions
• Approved powder production methods
• Protokoll för test av efterlevnad
• Quality assurance requirements

Powder produced to these standards ensures optimal aging response, ductility, and corrosion resistance.

GH4169 Powder Particle Sizes

GH4169 Powder Particle Size Distribution

Partikelstorlek	Egenskaper
10-22 microns	Ultrafine grade for high density
22-75 microns	Most commonly used size range
75-150 microns	Coarser sizes for improved flowability

• Finer particles promote higher sintered density
• Coarser particles improve powder flow into die cavities
• Gas atomization and water atomization both used
• Size distribution tailored to final part properties needed

Controlling particle size distribution optimizes pressing behavior, final density, and mechanical performance.

GH4169 Powder Apparent Density

GH4169 Powder Apparent Density

Skenbar densitet	Detaljer
Upp till 50% av verklig densitet	För oregelbunden pulvermorfologi
4.5-5.5 g/cc	Higher for spherical powders

• Spherical powders provide higher apparent density
• Irregular particles have density around 45%
• Högre skenbar densitet förbättrar pulverflöde och kompressibilitet
• Allows higher green density after compaction

Higher powder apparent density leads to better manufacturing productivity and part performance.

GH4169 Powder Production Method

GH4169 Powder Production

Metod	Detaljer
Atomisering av gas	Inert gas under högt tryck bryter upp smält metallström i fina droppar
Water atomization	High pressure water jet breaks metal into fine particles
Induktionssmältning i vakuum	Insatsmaterial med hög renhet som smälts under vakuum
Flera omsmältningar	Förbättrar den kemiska homogeniteten
Siktning	Classifies powder into different particle size ranges

• Gas atomization provides spherical powder shape
• Water atomization is lower cost but irregular particles
• Vakuumbearbetning minimerar gasformiga föroreningar
• Post-processing allows particle size control

Fully automated methods combined with strict quality control ensure reliable and consistent powder suitable for critical applications.

GH4169 Powder Pricing

GH4169 Powder Pricing

Faktor	Påverkan på priset
Pulverkvalitet	Högre renhet ökar kostnaden
Particle size and shape	Fine spherical powder most expensive
Orderkvantitet	Priset sjunker med större volymer
Additional processing	Services like sieving adds cost
Testing requirements	More rigorous testing increases cost

Indikativ prissättning

• Irregular GH4169 powder: $18-24 per kg
• Spherical GH4169 powder: $22-30 per kg
• Large volume pricing can be 25-35% lower

Pricing depends on purity level, powder characteristics, order volume and additional processing required.

GH4169 Powder Suppliers

GH4169 Powder Suppliers

Företag	Plats
Snickare Tillsats	USA
Erasteel	USA, Europe
Sandvik Osprey	STORBRITANNIEN
Aubert & Duval	Frankrike
CNPC Powder Group	Kina
Jingdong nytt material	Kina

Selection factors include:

• Powder grades produced
• Produktionskapacitet och ledtider
• Powder quality and consistency
• Testing capability and reporting
• Pricing and minimum order quantity
• Experience serving targeted industries

GH4169 Powder Handling and Storage

GH4169 Powder Handling

Rekommendation	Anledning
Säkerställ korrekt ventilation	Prevent exposure to fine metallic particles
Undvik antändningskällor	Pulver kan antändas i syrehaltig atmosfär
Följ säkra protokoll	Minska hälso- och brandriskerna
Använd verktyg som inte slår gnistor	Förhindra risken för antändning
Förvara förseglade behållare	Förhindrar kontaminering eller oxidation

Rekommendationer för lagring

• Förvaras i stabila behållare på en torr och sval plats
• Limit exposure to moisture and acids
• Håll temperaturen under 30°C

With proper precautions during handling and storage, GH4169 powder remains stable and safe to work with.

GH4169 Powder Inspection and Testing

GH4169 Powder Testing

Test	Detaljer
Kemisk analys	ICP and XRF verify composition
Analys av partikelstorlek	Determines particle size distribution
Skenbar densitet	Mätt enligt standarden ASTM B212
Morfologi för pulver	SEM-avbildning av partikelform
Flow rate testing	Gravity flow rate through specified funnel
Loss on ignition	Determines moisture content

Testing ensures the powder meets the required composition, particle characteristics, density specifications, morphology and flow rate as per applicable standards.

GH4169 Powder Pros and Cons

Advantages of GH4169 Powder

• Exceptional strength after precipitation hardening
• Retains good ductility in peak aged condition
• Excellent corrosion resistance including marine environments
• High strength maintained up to 650°C
• Good combinations of properties for critical structural parts
• More cost-effective than superalloys

Limitations of GH4169 Powder

• Requires careful heat treatment for optimal properties
• Lower fracture toughness than austenitic steels
• Subject to sensitization during improper welding
• Begränsad kapacitet för kallbearbetning och formning
• Strength and corrosion resistance not as high as superalloys
• Price higher than common stainless steel grades

Comparison With 17-4PH and 15-5PH Powder

GH4169 vs. 17-4PH and 15-5PH Powder

Parameter	GH4169	17-4PH	15-5PH
Täthet	7,9 g/cc	7.7 g/cc	7.8 g/cc
Hårdhet	40-45 HRC	38-45 HRC	36-42 HRC
Draghållfasthet	1300-1600 MPa	1200-1450 MPa	1050-1400 MPa
Korrosionsbeständighet	Utmärkt	Mycket bra	Bra
Kostnad	Hög	Måttlig	Låg

• GH4169 has highest strength after aging treatment
• It also provides the best corrosion resistance
• 17-4PH is moderately stronger than 15-5PH
• 15-5PH is the most economical of the three
• GH4169 preferred for critical structural applications

GH4169 Powder FAQs

Q: What are the main applications of GH4169 precipitation hardening stainless steel powder?

A: Main applications include aerospace structures, marine components like shafts and valves, nuclear fuel element cladding, oil and gas wellhead parts, chemical process equipment, and other structural parts needing high strength and corrosion resistance.

Q: What is the role of aluminum and titanium in GH4169 composition?

A: Aluminum and titanium facilitate precipitation hardening by forming fine coherent precipitates during aging treatment. This imparts substantial strengthening while retaining reasonable ductility.

Q: What precautions are needed when working with GH4169 powder?

A: Recommended precautions include ventilation, avoiding ignition sources, using non-sparking tools, protective gear, following safe protocols, and storing sealed containers away from contaminants or moisture.

Q: How does GH4169 differ from martensitic and ferritic stainless steel grades?

A: GH4169 can be aged to much higher strength levels compared to martensitic or ferritic grades. It also provides excellent corrosion resistance including in marine environments, unlike martensitic grades.