Description

PowderRange® M300 is an age hardenable martensitic tool steel with exceptional mechanical properties, specifically a high tensile strength and hardness. It is easily heat treated with superior mechanical properties being achieved after age hardening. The high carbon tool steels such as H13 or M2, which are typically used in tooling and molding applications, are very difficult to process by conventional Laser Powder Bed Fusion. PowderRange® M300 offers a comparable alternative in terms of mechanical properties, but with proven additive manufacturing suitability. PowderRange® M300 maintains strict control over residual alloying elements to optimize for additive manufacturing.

Key Properties:

Exceptional strength
Heat resistant to 900°F
High hardness and wear resistance

Markets

Automotive
Industrial

Applications

Tool inserts for molding and casting
Tire sipes and molds
Hard-wearing functional components

Part Number	PowderRange® M300 F	PowderRange® M300 E
Application	L-PBF1	EB-PBF or DED¹
Maximum Particle Size	Max 1 wt% > 53 µm2	Max 10 wt% > 106 μm²
Minimum Particle Size	Max 10 vol% < 15 µm3	Max 10 wt% < 45 μm²
LSD Percentile	D10, D50, D903, reported
Atomization	Nitrogen Gas Atomized
Apparent Density (G/CM3)	Measured according to ASTM B2124 and reported
Hall Flow (S/50G)	Measured according to ASTM B2135 and reported

¹ASTM/ISO 52900: Laser—Powder Bed Fusion (L-PBF), Electron-Beam Powder Bed Fusion (EB-PBF), Directed Energy Deposition (DED)
²ASTM B214 Standard Test Method for Sieve Analysis for Metal Powders
³ ASTM B822 Standard Test Method for Particle Size Distribution of Metal Powders and Related Compounds by Light Scattering
⁴ ASTM B212 Standard Test Method for Apparent Density of Free-Flowing Metal Powders Using the Hall Flowmeter Funnel
⁵ ASTM B213 Standard Test Method for Flow Rate of Metal Powders Using the Hall Flowmeter Funnel
Testing of powder will fulfill certification requirements to Nadcap Materials Testing and ISO/IEC 17025 Chemical, per relevant ASTM procedures

Laser-Powder Bed Fusion(L-PBF)

PowderRange 718 for additive manufacturing is compatible with all commercially available L-PBF equipment. To achieve mean, as-built density >99.9%, 20 to 60 µm layer thicknesses and Specific Energy ≥ 50 J/mm3 is recommended.

Solution Anneal andPrecipitation Heat Treatmentcondition(Sol/Pre)

Standard solution treatment and age hardening schedules can be used to obtain different combinations of tensile and stress rupture properties (e.g. AMS5662 and AMS5664). Example AMS5662 Solution and Age Cycle: Solution Anneal per AMS5662N section 3.4 by heating to approximately 1780°F (971°C) for approximately 1 hour followed by air cool. Precipitation heat treat per AMS5662N section 3.5.1.2 at 1325°F (718°C ) for 8 hours followed by cooling at 100°F (56°C) per hour to 1150°F (621°C) and hold at least another 8 hours then air cool. Schedules better tailored to the AM process thermal history may be available. Please contact Carpenter Technology for information.

Hot IsostaticPressed condition(HIP/Sol/Pre)

We recommend HIP as standard practice for microstructure homogenization; removal of residual spatter-induced voids, trapped gas porosity in powder and keyhole porosities; as well as to heal any shrinkage-induced micro-cracks in the material. To achieve up to full density (100%): Process components per ASTM F3055 section 13: minimum pressure of 14.5 ksi (100 MPa) at a temperature of approximately 2087°F (1141°C) for 240 minutes in argon. Follow with Solution Anneal and Precipitation Heat Treatment as described above or other heat treatment as desired.

Machinability

The alloy can be readily machined in either the annealed or the age-hardened condition. The age-hardened condition gives better chip action on chip breaker tools and produces a better finish. The annealed condition will give a slightly longer tool life. Because specific cutting forces are high, the machine tools used must have ample power and the cutting speed should be slow. The tools must have smooth finishes, be sharp, and be very rigid. To avoid work hardening, a continuous, smooth cutting action should be maintained; thus, the machines must have a minimum of backlash and the tool and workpiece must be rigidly supported. If possible, avoid very small cuts and feeds.

Condition	Transverse	Longitudinal (Y-Z Plane)	Notes
As-Built			Mean densities greater than 99.8%
HIP/Sol			Mean densities up to 100%
As-built, etched⁶			Lath martensite microstructure Minimal spatter porosity Some evidence of weld lines visible
Sol/Age, etched⁶			Recrystallized equiaxed grain structure minimizes anisotropy
HIP/Sol/Age, etched⁶			Lath martensite microstructure

Typical achievable mechanical properties

⁷Average of a minimum of 5 samples taken from across the extents of a build plate in each orientation and for each heat treatment. Testing performed in accordance with ASTM E8/E8M-16a (tensile), ASTM E23-18 (impact energy) and ASTM E18-19 (hardness). Additional data may be available through a wide range of consortia and other collaborations. Please contact Carpenter Additive for additional information.
⁸Forged Bar: https://www.carpentertechnology.com/en/product-solutions/cartech-nimark-alloy-300/#

Corrosion resistance

IMPORTANT NOTE: The following 4-level rating scale (Excellent, Good, Moderate, Restricted) is intended for comparative purposes only and is derived from experiences with wrought product. Additive manufactured material may perform differently; corrosion testing is recommended. Factors that affect corrosion resistance include temperature, concentration, pH, impurities, aeration, velocity, crevices, deposits, metallurgical condition, stress, surface finish, and dissimilar metal contact.

Corrosion resistance of PowderRange® M300 is limited. To discuss high strength, stainless steel alloy options please contact Carpenter Additive.

POWDERRANGE®

M300

Datasheet

For additional information,
please contact your nearest sales office:
info@carpenteradditive.com | 610 208 2000

The mechanical and physical properties of any additively-manufactured material are strongly dependent on the processing conditions used to produce the final part. Significantly differing properties can be obtained by utilizing different equipment, different process parameters, different build rates and different geometries. The properties listed are intended as a guide only and should not be used as design data.

The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his/her own evaluation and are not intended as warranties, either express or implied, of fitness for these or other purposes. There is no representation that the recipient of this literature will receive updated editions as they become available.

Unless otherwise specified, registered trademarks are property of CRS Holdings Inc., a subsidiary of Carpenter Technology Corporation.

POWDERRANGE® M300

Datasheet

Type Analysis

Description

Powder Properties

Additive manufacturing process guidance

Sol/Age, etched⁶

Typical achievable mechanical properties

Corrosion resistance

Similar materials

POWDERRANGE®

M300

Datasheet

POWDERRANGE® M300

Datasheet

Type Analysis

Description

Powder Properties

Additive manufacturing process guidance

Sol/Age, etched6

Typical achievable mechanical properties

Corrosion resistance

Similar materials

POWDERRANGE®

M300

Datasheet

Sol/Age, etched⁶