Stainless Steel Powders SS304 SS304L
Stainless Steel Powders SS304 SS304L
  • Properties
  • Application
  • Standard Specification
  • Packing and Storage

CNPC POWDER© is an experienced stainless steel powder manufacturer and supplier, with a range from SS304 to SS430L, including basic austenitic grade, martensitic grade and ferritic grade. All these SS powders have two different shapes: irregular and spherical.
CNPC-SS304 SS304L is austenite size stainless steel that have irregular and spherical shape. Used in different fields.

Production method for stainless steel powder 304 304l is atomization including water atomized(irregular shape) and gas atomized(spherical shape)

CAS no.:


HS code:


Mean size



Grey black powder


Spherical form or irregular form



Product method:

Water atomized and Gas atomized

Specific Gravity/Density:


What are stainless steels:
Iron-base alloys containing different sufficient CHROMIUM to form a stable passive film on the surface.
10.5% is the qualifying concentration of Cr for an alloy to be called Stainless Steel.


What makes stainless steel “stainless”:
With sufficient chromium(>10.5%), the steel is able to form a protective film on the surface (passivate) in aqueous environments.



Properties of Austenitic(304,304L): (L means C 0.03%)

Excellent resistance to corrosion

High toughness and good buctility

Moderate strength, hardenable by cold work

High resistance to oxidation at elevated temperature

Low thermal conductivity

High coefficient of thermal expansion

Non-magnetic Not heat treatable

Alloying elements: Cr, Ni, (Mo) min 9%

             Properties of ferritic:

    Low to moderate corrosion resistance
    Moderate strength & ductility
    Magnetic, not heat treatable
    Marginal high temp strength & oxidation resistance
    Higher thermal conductivity
    Lower coefficient of thermal expansion
    Low-cost option with functional corrosion resistance
    Alloying elements: Cr(Mo, Nb)

Stainless Steel Powder 304 304L is a kind of common stainless steel, it is widely used to make for a good comprehensive performance, corrosion resistance and formability of equipment and parts. PM, Sintering, MIM, such processes are mainly used watches, jewelry, cutlery products, Stainless steel protective film and a variety of stainless steel structures. 

Why use stainless steel:

  1. Corrosion resistance
  2. Oxidation resistance
  3. Elevated temperature mechanical strength
  4. Room temp mechanical strength, toughness
  5. Low-cost wear resistant material (with 410)
  6. Magnetic behavior with ferritic
Grade Composition (%) A.D.g/cm3 Particle Size
CNPC-SS304 Cr18-20, Ni8-12, C 0.08, S 0.03, P0.04, Mn 2, Si 1 0.3 3.5-5.0 Irregular Shape:100mesh, 200mesh,
300mesh,D50:9-12μm,D50 3-5um

Shperical Shape:100mesh,200mesh,300mesh,
D50:9-12um, D50 1-2um, D50 0.5-1um
CNPC-SS304L Cr18-20, Ni8-12, C 0.03, S 0.03, P0.04, Mn 2, Si 1

Grade Package
CNPC-SS304 25KG/Package
CNPC-SS304L 25KG/Package
CNPC-SS316 25KG/Package
CNPC-SS316L 25KG/ Package
CNPC-SS410 25KG/ Package
CNPC-SS420 25KG/ Package
CNPC-SS430 25KG/ Package

Stainless Steel Storage:
  •  Easily oxide in high temperature.
  •  Usually stored in tank or jar.
  •  Carefully keep away from moist and damp. Store in dry and ventilating place.

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