ZG35Cr24Ni7SiN is a high-chromium-nickel austenitic stainless steel, which has excellent corrosion resistance in oxidizing media and good High temperature mechanical properties.

ZG35Cr24Ni7SiN adopts vacuum solid mold casting, centrifugal casting, resin sand casting, silica sol casting, water glass sand casting and other production processes, and has medium frequency induction furnace, electric arc furnace, refining furnace and other smelting equipment. Greater impact. When the solution temperature is lower than 1050 ℃, the grain growth rate is not obvious; when the temperature is higher than 1050 ℃, the grain size grows rapidly with the increase of the solution treatment temperature. When the Inconel600 alloy is solution treated below 1050℃, the hardness value remains basically unchanged, and reaches the maximum value at 1050℃, and decreases with the increase of solution treatment temperature above 1050℃. Inconel600 alloy has excellent resistance to sulfuric acid-iron sulfate intergranular corrosion after solution treatment. After solid solution at 1100 °C, carbides can be fully dissolved. Considering the effect of solid solution degree and grain size on properties, it is recommended that the solution treatment temperature of Inconel600 alloy be 1050-1100 °C.

Chemical composition (mass fraction)(wt. %) of the ZG35Cr24Ni7SiN

The main elements proportion of ZG35Cr24Ni7SiN as below:
Element Min Max
N (%) 0.2 0.28
S (%) - 0.03
P (%) - 0.04
Ni (%) 7 8.5
Cr (%) 23 25.5
Mn (%) 0.8 1.5
Si (%) 1.3 2
C (%) 0.3 0.4

Nickel (Ni): Nickel increases the strength of steel while maintaining good ductility and toughness. Nickel has high corrosion resistance to acid and alkali, rust and heat resistance at high temperature. However, since nickel is a relatively scarce resource (high price), other alloying elements should be used instead of nickel-chromium steel.

Chromium (Cr): In alloy steels, chromium can significantly improve strength, hardness and wear resistance, while reducing plastic toughness. Chromium can also improve the oxygen and corrosion resistance of steel, so stainless steel is an important alloying element of heat-resistant steel.

Molybdenum (Mo): Molybdenum can refine the grains of steel, improve hardenability and thermal strength, and maintain sufficient strength and creep resistance at high temperatures (long-term stress at high temperatures, deformation occurs, called creep ). The addition of molybdenum to alloy steel can improve mechanical properties. Alloy steels can also be brittle due to fire. It can improve redness in tool steel.

Cobalt (Co): Cobalt is a rare precious metal used in special steels and alloys, heat-resistant strong steels and magnetic materials.

Mechanical properties of ZG35Cr24Ni7SiN

Properties Data
Yield Rp0.2 (MPa) 929 (≥)
Tensile Rm (MPa) 529 (≥)
Impact KV/Ku (J) 44
Elongation A (%) 23
Reduction in cross section on fracture Z (%) 24
As-Heat-Treated Condition Solution and Aging, Annealing, Ausaging, Q+T,etc
Brinell hardness (HBW) 441

Physical Properties of steel grade ZG40Cr25Ni20(ZG4Cr25Ni20)

Temperature (°C) 42 241 811
Modulus of elasticity (GPa) - 957 -
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and - - 33
Thermal conductivity (W/m·°C) 24.3 42.2
Specific thermal capacity (J/kg·°C) 142
Specific electrical resistivity (Ω mm²/m) 0.12
Density (kg/dm³) - - 142
Poisson’s coefficient, ν 142
ZG35Cr24Ni7SiN plate install

ZG35Cr24Ni7SiN plates are installed


ZG10Cr13NiMo is mainly suitable for castings of high-temperature nitric acid concentration equipment not subject to impact load, such as pumps, valves, etc.; it can also be used to manufacture sodium hypochlorite and phosphoric acid equipment and high-temperature oxidation-resistant heat-resistant components.


ZG35Cr24Ni7SiN liner can be used continuously at 1000-1300 ℃ in high temperature environment, and has good thermal fatigue resistance and performance. It is not easy to produce hot cracking phenomenon after repeated use. The operating temperature can reach above 1400 ℃, and the product quality is stable. The formation of the zone inhibits the occurrence of sliding wear and promotes the gradual reduction of the friction coefficient and wear amount. The tribo-oxidation mainly occurs in the micro-slip zone of the wear scar, and the central adhesion zone is relatively rare; the distribution of oxygen elements is more concentrated at high temperature than at room temperature. The surface oxygen content of the central adhesion zone is low, and a large amount of Ni, Cr and Fe elements exist in the surface layer; the surface oxides of the wear scar are composed of NiO, Cr2O3 and Fe3O4. At room temperature and high temperature, micro-cracks occurred at the interface between the adhesion zone and the micro-slip zone on the surface of the wear scar. At high temperature, the cracks were initiated in the micro-slip zone. Compared with room temperature, the number of cracks initiated at high temperature was smaller and the length was smaller.

ZG35Cr24Ni7SiN Range of products

Type Products Dimension Processes Deliver status
Plates/ Sheets Plates/ Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and
Shot Blasting
Steel Bar Round Bar, Flat Bar,
Square Bar
Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning,
Shot Blasting
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled and Hot- Rolled Annealed, Solution and
Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes,
Welded Pipes/Tubes
OD:6-219mm x
Hot extrusion, Cold drawn, Welded Annealed, Solution and

Other Special Steel Materials Of ZG35Cr24Ni7SiN

【H】 Ceramic lined pipe

Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.

【H】 Cast basalt lined steel pipe

Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.

【H】 Ceramic Tile Lined Pipes

Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.

【H】 Rare earth alloy wear-resistant pipe

The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.

【H】 Tubes Erosion Shields

Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.

【H】 ASTM A213 T91 Alloy Tube

The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.