SS6631 مسحوق فولاذ الكروم والنيكل والسيليكون SS6631 30CrNi2SiMoVA

30CrNi2SiMoVA Steel Powder Description

30CrNi2SiMoVA Steel Powder is a high-strength low-alloy (HSLA) material engineered for advanced manufacturing processes, combining exceptional mechanical properties with precise compositional control. Its chemical composition includes chromium (Cr), nickel (Ni), molybdenum (Mo), vanadium (V), and silicon (Si), which synergistically enhance strength, toughness, and thermal stability. Chromium and molybdenum contribute to improved hardenability and oxidation resistance, while nickel enhances ductility and fatigue resistance, particularly under cyclic loading. Vanadium forms fine carbides that refine grain structure, inhibit grain growth during thermal processing, and improve wear resistance. The powder typically exhibits ultra-high tensile strength (1800±20 MPa) and balanced elongation, ensuring structural integrity under extreme stress.

Produced via gas atomization, the powder features a tightly controlled particle size distribution (15-53 μm), high sphericity (>95%), and low oxygen content (≤300 ppm), optimizing flowability (Hall flow rate ≤25 s/50 g) and minimizing porosity (<0.3%) in additive manufacturing. Rapid solidification during atomization suppresses elemental segregation, yielding a homogeneous microstructure with dispersed carbide precipitates. Post-processing heat treatments further enhance mechanical properties by promoting martensitic transformation and carbide stabilization. The powder’s low impurity levels (P, S ≤0.025%) reduce susceptibility to hot cracking and embrittlement, ensuring reliability in demanding environments. Its combination of strength, processability, and microstructural stability makes it a critical material for high-performance industrial applications requiring precision and durability.

30CrNi2SiMoVA Steel Powder Applications

·          30CrNi2SiMoVA steel powder is extensively utilized in industries demanding ultra-high strength, wear resistance, and thermal stability. In aerospace engineering, it serves as a critical material for manufacturing turbine blades, landing gear components, and structural brackets, where its exceptional tensile strength (1800±20 MPa) and fatigue resistance ensure reliability under extreme mechanical and thermal loads. The energy sector employs this powder in gas turbine components, nuclear reactor fittings, and high-pressure valve systems, leveraging its oxidation resistance and creep performance at elevated temperatures. Within the automotive industry, it is adopted for producing high-stress parts such as transmission gears, crankshafts, and suspension systems, benefiting from its refined grain structure and wear-resistant carbide dispersion.

·          Additive manufacturing (AM) technologies, including laser powder bed fusion (LPBF) and electron beam melting (EBM), heavily rely on this powder due to its optimized particle size distribution (15-53 μm) and high sphericity (>95%), which enable precise layer-by-layer fabrication of complex geometries with minimal porosity. This capability supports the production of lightweight, topology-optimized designs for industrial machinery, such as hydraulic actuators and heavy-duty tooling, where both strength and precision are paramount. Furthermore, its low impurity content (P, S ≤0.025%) ensures minimal susceptibility to cracking during post-processing heat treatments, making it suitable for critical defense applications like armored vehicle components and ballistic protection systems. The powder’s versatility across these sectors underscores its role in advancing high-performance, durable engineering solutions.

30CrNi2SiMoVA 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.

30CrNi2SiMoVA Steel Powder FAQs

Q1. Why is low oxygen content critical?

Oxygen levels ≤300 ppm minimize oxide inclusions, reducing brittleness and enhancing fatigue resistance in high-stress environments.

Q2. What post-processing is required?

Heat treatments (e.g., quenching, tempering) are essential to achieve optimal martensitic microstructure and carbide stabilization. HIP (Hot Isostatic Pressing) may reduce residual porosity.

Q3. What industries use this powder?

It is widely adopted in aerospace (turbine blades, landing gear), energy (gas turbine components), automotive (gears, crankshafts), and defense (armored systems).

Performance Comparison Table with Competitive Products

Alloy Properties Comparison Table

Related Information

1.       Common Preparation Methods

30CrNi2SiMoVA steel powder is typically produced using gas atomization, where pre-alloyed feedstock is melted in an inert argon atmosphere to prevent oxidation. The molten metal is then disintegrated into fine droplets via high-pressure gas jets, achieving rapid solidification rates (>10³ K/s) to minimize elemental segregation and ensure a homogeneous microstructure. This method yields spherical particles (>95% sphericity) with a controlled particle size distribution (15-53 μm), optimized for laser-based additive manufacturing systems like SLM or DMLS. Post-atomization steps include sieving, airflow classification, and vacuum degassing to refine powder flowability (Hall flow rate ≤18 s/50g) and reduce oxygen content (≤300 ppm). Critical parameters such as melt temperature, gas pressure, and cooling rate are tightly regulated to enhance mechanical properties, including ultra-high tensile strength (1800±20 MPa) and resistance to thermal cracking. The resulting powder exhibits low porosity (<0.3%) and uniform carbide dispersion, ensuring reliability in high-stress applications such as aerospace and automotive components.