SS6629 12Cr9Ni مسحوق فولاذ الدي (Die Steel Powder)

12Cr9Ni Die Steel Powder Description

12Cr9Ni is a martensitic stainless steel powder with 12% chromium (Cr) and 9% nickel (Ni), featuring low carbon content (≤0.03% C) to enhance toughness and reduce carbides. Alloying additions like titanium (Ti) and aluminum (Al) enable precipitation hardening, while molybdenum (Mo) improves thermal stability. After aging (450-475°C), it achieves tensile strengths over 1,500 MPa and balanced toughness due to its martensitic matrix with reverted austenite phases, which mitigate brittleness. Fine precipitates (e.g., Ni3Ti) enhance wear resistance.

The steel maintains mechanical stability up to 450-500°C and offers moderate corrosion resistance from chromium, though less than austenitic grades like 316L. Its low carbon content reduces stress corrosion cracking risks in alkaline environments. Optimized for laser powder bed fusion (LPBF), the powder ensures crack-free fabrication with high density (>99.9%) via controlled solute segregation. Post-processing includes solution treatment (~1,000°C) and aging to maximize strength and dimensional stability. It outperforms conventional stainless steels in strength-toughness balance and additive manufacturing compatibility.

12Cr9Ni Die Steel Powder Applications

1. Tooling and Die Manufacturing

Injection Molds: Used for high-precision plastic injection molds requiring wear resistance and dimensional stability under cyclic thermal stresses.

Extrusion Dies: Ideal for aluminum or polymer extrusion tools due to its high-temperature strength (up to 500°C) and resistance to abrasive wear.

2. Aerospace Components

Turbine Blades and Engine Parts: Suitable for critical components exposed to elevated temperatures and mechanical loads, leveraging its thermal stability and fatigue resistance.

High-Stress Fasteners: Used in aircraft assemblies for high tensile strength (>1,500 MPa) and corrosion resistance.

3. Medical Devices

Surgical Instruments: Biocompatible variants are employed for scalpels, forceps, and orthopedic tools, benefiting from low cytotoxicity and sterilization compatibility.

Dental Implants: Processed via additive manufacturing (LPBF) for custom-shaped implants with high surface finish and structural integrity.

4. Additive Manufacturing (AM)

Complex Geometries: Enables crack-free 3D printing of intricate molds, lightweight aerospace brackets, and topology-optimized parts due to optimized solute segregation (Ti/Al) and high-density (>99.9%) fabrication.

5. Automotive Industry

High-Performance Engine Parts: Used in turbocharger components and valve systems for its heat resistance and oxidation stability.

Lightweight Tooling: Reduces the weight of stamping dies while maintaining durability in high-volume production.

6. Energy Sector

Valve Components: Deployed in oil and gas pipelines or nuclear reactors for corrosion resistance in mildly aggressive environments.

Thermal Power Plant Parts: Withstands cyclic thermal loads in turbine housings and exhaust systems.

12Cr9Ni Die Steel Powder Packaging

Our products are packaged in customized cartons of various sizes based on the material dimensions. Small items are securely packed in PP boxes, while larger items are placed in custom wooden crates. We ensure strict adherence to packaging customization and the use of appropriate cushioning materials to provide optimal protection during transportation.

Packaging: Carton, Wooden Box, or Customized.

Kindly review the packaging details provided for your reference.

Manufacturing Process

1.       Testing Method

(1)    Chemical Composition Analysis - Verified using techniques such as GDMS or XRF to ensure compliance with purity requirements.

(2)    Mechanical Properties Testing - Includes tensile strength, yield strength, and elongation tests to assess material performance.

(3)    Dimensional Inspection - Measures thickness, width, and length to ensure adherence to specified tolerances.

(4)    Surface Quality Inspection - Checks for defects such as scratches, cracks, or inclusions through visual and ultrasonic examination.

(5)    Hardness Testing - Determines material hardness to confirm uniformity and mechanical reliability.

Please refer to the SAM testing procedures for detailed information.

12Cr9Ni Die Steel Powder FAQs

Q1. How does it compare to 17-4PH or 316L stainless steel?

vs. 17- 4PH: Higher toughness and better printability (lower hot-cracking risk).

vs. 316L: Superior strength and wear resistance but lower corrosion resistance in harsh environments.

Q2. Is it suitable for corrosive environments?

Offers moderate corrosion resistance (due to Cr content) but requires coatings for prolonged exposure to acids or chlorides.

Q3. What AM technologies are compatible?

Optimized for laser powder bed fusion (LPBF) due to controlled solute segregation (Ti/Al) and high packing density.

Performance Comparison Table with Competitive Products

Related Information

1.       Common Preparation Methods

The production of 12Cr9Ni die steel powder utilizes gas atomization to create spherical particles optimized for additive manufacturing. In this process, the alloy (composed of 12% Cr, 9% Ni, ≤0.03% C, and trace Ti/Al/Mo) is melted and atomized using high-pressure inert gas (Ar or N₂), yielding powders with a controlled size range of 15-45 μm, sphericity >95%, and oxygen content below 100 ppm. These powders are specifically engineered for laser powder bed fusion (LPBF), requiring optimized parameters such as laser power (200-350 W), scan speed (800-1,200 mm/s), and layer thickness (20-40 μm) to achieve crack-free parts with >99.9% density.

Post-processing involves a two-stage heat treatment: solution treatment at 1,000-1,050°C for 1-2 hours to homogenize the microstructure, followed by aging at 450-475°C for 4-6 hours to precipitate hardening phases like Ni₃Ti, resulting in tensile strengths of ~1,800 MPa and hardness of 40-45 HRC. Quality assurance includes rigorous powder characterization (size distribution via laser diffraction, chemical analysis by ICP-OES/XRF) and mechanical validation (tensile testing per ASTM E8, SEM/TEM microstructure analysis). This method ensures scalability, AM compatibility, and tunable mechanical properties for applications in tooling, aerospace, and medical devices.