S2 prášek

Overview of S2 Powder

Prášek S2 je prášek z rychlořezné nástrojové oceli ideální pro výrobu řezných nástrojů vyžadujících vysokou tvrdost, pevnost a odolnost proti opotřebení při zvýšených teplotách. Obsahuje wolfram, molybden, vanad a další slitiny zajišťující vynikající tvrdost za tepla a odolnost proti tepelné únavě.

Key properties and advantages of S2 powder:

S2 Powder Properties and Characteristics

Vlastnosti	Podrobnosti
Složení	Fe-1C-5Cr-2.35Mo-6.4W-1.4V-2Si alloy
Hustota	7,7 g/cc
Tvar částic	Nepravidelné, hranaté
Rozsah velikostí	10-150 mikronů
Zdánlivá hustota	Až 50% skutečné hustoty
Tekutost	Nízká až střední
Tvrdost	62-64 HRC when heat treated
Houževnatost	Velmi dobré

S2 powder produces cutting tools, dies, and machine components with extended service life under continuous high temperature and intermittent shock loading conditions.

S2 Powder Composition

Typical composition of S2 high speed steel powder:

S2 Powder Composition

Živel	Hmotnost %
železo (Fe)	Zůstatek
uhlík (C)	0.9-1.2%
Chrom (Cr)	3.8-4.5%
Wolfram (W)	6.4%
molybden (Mo)	1.9-2.2%
Vanad (V)	1.3-1.6%
mangan (Mn)	0.2-0.5%
křemík (Si)	0.9-1.4%

• Iron provides the ferritic matrix
• Carbon, tungsten, and chromium form hard carbides
• Vanadium and molybdenum enhance wear resistance
• Manganese and silicon facilitate machining

The composition is optimized to achieve an exceptional combination of hot hardness, red hardness, and toughness necessary for high speed machining applications.

S2 Powder Physical Properties

S2 Powder Physical Properties

Vlastnictví	Hodnoty
Hustota	7,7 g/cc
Bod tání	1320-1350°C
Tepelná vodivost	37 W/mK
Elektrický odpor	0.6 μΩ-m
Maximální provozní teplota	600°C
Curieho teplota	770°C

• High density enables miniaturized components
• Retains hardness and strength at elevated temperatures
• Nad Curieho bodem se stává paramagnetickým
• Can withstand prolonged service up to 600°C
• Good thermal conductivity reduces thermal expansion stresses

These properties provide a balanced combination of hot hardness and thermal shock resistance required in high speed machining applications.

S2 Powder Mechanical Properties

S2 Powder Mechanical Properties

Vlastnictví	Hodnoty
Tvrdost	62-64 HRC
Transverse rupture strength	4500-4800 MPa
Pevnost v tlaku	3800-4100 MPa
Pevnost v tahu	2050-2250 MPa
Pevnost v tahu	1930-2050 MPa
Prodloužení	8-10%
Impact toughness	10-14 J/cm2

• Exceptional hardness when heat treated
• High strength with reasonable ductility
• Very good compressive and transverse rupture strength
• Excellent red hardness at elevated temperatures
• Strength depends on heat treatment process

S2 powder produces cutting tools and dies with hardness, strength, and thermal properties needed to machine challenging materials at high speeds and temperatures.

S2 Powder Applications

Typical applications of S2 high speed steel powder include:

S2 Powder Applications

Průmysl	Příklad použití
Automobilový průmysl	Cutting and milling tools
Aerospace	Drills, end mills
Výrobní	Punches, forming dies
Ropa a plyn	Downhole tools, drill bits
General machining	Turning, boring, and planing tools

Některá specifická použití výrobku:

• Cutting inserts, indexable tooling
• Broaches, reamers, taps, threading dies
• Metal slitting saws and industrial knives
• Extrusion tooling and drawing dies
• Cold heading and forging dies
• Gauges, wear-resistant components

S2’s unique properties make it the top choice for reliable cutting tools and components used in demanding metalworking applications.

S2 Powder Specifications

Key specifications for S2 high speed steel powder:

S2 Powder Standards

Standard	Popis
ASTM A600	Specification for tool steels high speed steel
JIS G4403	High speed tool steels
DIN 1.2363	Equivalent to AISI S7 high speed steel
UNS T11302	Designation for AISI S2 grade
ISO 4957	Tool steels specification

Ty definují:

• Chemical composition limits of S2
• Required mechanical properties in heat treated condition
• Approved production methods like gas atomization
• Protokoly o testování shody
• Quality assurance requirements
• Proper packaging and identification

Powder produced to these standards ensures suitability for high wear resistance tooling applications under thermal fatigue conditions.

S2 Powder Particle Sizes

S2 Powder Particle Size Distribution

Velikost částic	Charakteristika
10-22 microns	Ultrafine grade provides highest density
22-53 microns	Most commonly used size range
53-105 microns	Coarser size provides good flowability

• Jemnější částice umožňují větší zhutnění při spékání.
• Coarser particles improve powder flow into die cavities
• Velikost se volí na základě potřebných vlastností finálního dílu
• Both gas and water atomized particles used

Controlling size distribution optimizes pressing behavior, sintered density, and final component performance.

S2 Powder Apparent Density

S2 Powder Apparent Density

Zdánlivá hustota	Podrobnosti
Až 50% skutečné hustoty	Pro nepravidelnou morfologii prášku
4.0-5.0 g/cc	Higher for spherical, lower for irregular powder

• Spherical powder shape provides high apparent density
• Irregular powder has lower density around 45-50%
• Higher apparent density improves die filling and part quality
• Allows complex tool geometry compaction

Higher apparent density leads to better component production rate and performance.

S2 Powder Production Method

S2 Powder Production

Metoda	Podrobnosti
Rozprašování plynu	High pressure inert gas breaks up molten alloy stream into fine droplets
Vakuové indukční tavení	Vstupní materiály vysoké čistoty tavené ve vakuu
Vícenásobné přetavení	Enhances chemical homogeneity
Sítování	Classifies powder into different particle size fractions

• Gas atomization provides spherical powder shape
• Vacuum melting eliminates gaseous impurities
• Multiple remelting improves uniformity
• Post-processing allows particle size customization

Fully automated processes combined with strict quality control ensures reliable and consistent S2 powder properties critical for tooling performance.

S2 Powder Pricing

S2 Powder Pricing

Faktor	Dopad na cenu
Úroveň čistoty	Higher purity grades cost more
Velikost částic	Ultrajemný prášek je dražší
Objednané množství	Price decreases with larger volumes
Další služby	Přizpůsobení zvyšuje náklady

Orientační ceny

• S2 spherical powder: $18-22 per kg
• S2 irregular powder: $12-16 per kg
• Large volume pricing up to 30% lower

Pricing depends on purity, particle characteristics, order quantity, and any additional customization requirements.

S2 Powder Suppliers

S2 Powder Suppliers

Společnost	Umístění
Höganäs	Švédsko
Tesařské práškové výrobky	USA
Erasteel	USA, Evropa
Crucible Industries	USA
voxco	Německo
Jingdong New Materials	Čína

Klíčové faktory výběru dodavatele:

• Nabízené stupně prášku
• Výrobní kapacita
• Particle characteristics and consistency
• Testing capability and quality control
• Pricing and lead times
• Technical customer service

S2 Powder Handling and Storage

S2 Powder Handling

Doporučení	Důvod
Ensure proper ventilation	Prevent exposure to fine metal particles
Use appropriate PPE	Avoid ingestion through nose/mouth
Ground equipment	Prevent static sparking
Vyhněte se zdrojům vznícení	Nebezpečí hořlavého prachu
Používejte nejiskřící nástroje	Prevent possibility of ignition
Follow safe protocols	Reduce fire, explosion, health risks

Doporučení pro ukládání

• Store sealed containers away from moisture or contamination
• Maintain storage temperatures below 27°C
• Limit exposure to oxidizing acids and chlorine compounds

Proper precautions during handling and storage help preserve purity and prevent safety hazards.

S2 Powder Inspection and Testing

S2 Powder Testing

Test	Podrobnosti
Chemická analýza	Verifies composition using optical/ICP spectroscopy
Particle size analysis	Determines size distribution using laser diffraction or sieving
Zdánlivá hustota	Measured as per ASTM B212 using Hall flowmeter
Morfologie prášku	SEM imaging to determine particle shape
Flow rate test	Gravity flow rate through specified funnel
Tap density test	Density measured after mechanically tapping powder sample

Testing ensures the powder meets the required chemical composition, physical characteristics, particle size distribution, morphology, density, and flow rate specifications.

S2 Powder Pros and Cons

Advantages of S2 Powder

• Exceptional hot hardness and red hardness
• High strength and wear resistance at elevated temperatures
• Good toughness and thermal shock resistance
• Resists softening and shape changes up to 600°C
• Dimensional stability under thermal cycling
• Cost-effective compared to exotic PM tool steel grades

Limitations of S2 Powder

• Moderate corrosion resistance without surface treatment
• Limited cold formability and shear strength
• Requires careful heat treatment by experienced providers
• Not weldable using conventional fusion welding
• Large cross-sections can experience embrittlement
• Contains expensive alloying elements

Comparison With H13 Tool Steel Powder

S2 vs H13 Tool Steel Powder

Parametr	S2	H13
Tvrdost	62-64 HRC	54-57 HRC
Hot hardness	Vynikající	Dobrý
Houževnatost	Velmi dobré	Dobrý
Thermal shock resistance	Vynikající	Mírný
Cold strength	Dobrý	Vynikající
Náklady	Vysoký	Nízký

• S2 has much greater hot hardness and thermal shock resistance
• H13 provides better cold strength and toughness
• S2 is more expensive due to higher alloy content
• S2 preferred for high speed machining applications
• H13 suited for cold and warm pressing tooling

S2 Powder FAQs

Q: What are the main applications of S2 tool steel powder?

A: Main applications include cutting tools like drills, mills, inserts, taps, dies, saws, planing tools, as well as extrusion tooling, forging dies, gauges, and components needing hot hardness and thermal shock resistance.

Q: What heat treatment is used for S2 tool steel powder?

A: S2 tool steel is typically heat treated by austenitizing between 1150-1200°C followed by air, oil, or polymer quenching, then tempering between 540-650°C to achieve hardness between 62-64 HRC.

Q: How does tungsten improve the properties of S2 steel?

A: Tungsten forms hard tungsten-iron-carbon complexes that provide exceptional hot hardness, strength and wear resistance at elevated temperatures needed for high speed machining applications.

Q: What safety precautions should be used when working with S2 powder?

A: Proper ventilation, protective gear, inert atmosphere, grounding, avoiding ignition sources, using non-sparking tools, and safe storage away from contamination or moisture.