What is 0Cr18Ni11Nb stainless steel? 

0Cr18Ni11Nb stainless steel is a high-corrosion-resistant austenitic stainless steel. It is a stainless steel that meets the Chinese GB-T standard. It corresponds to the American ASTM standard S0Cr18Ni11Nb00. 0Cr18Ni11Nb stainless steel has high oxidation resistance and high temperature resistance. Alloy elements The addition of tantalum and niobium greatly improves the strength and intergranular corrosion resistance of 0Cr18Ni11Nb stainless steel, and will not reduce the plasticity of the material. 0Cr18Ni11Nb stainless steel is mainly used for welding parts used at high temperatures.

What are the standards for 0Cr18Ni11Nb stainless steel?

0Cr18Ni11Nb corresponding grade:

1. American standard: ASTMA standard: S0Cr18Ni11Nb00, SAE standard: 300Cr18Ni11Nb, UNS standard: 0Cr18Ni11Nb, F0Cr18Ni11Nb

2. Japanese standard JIS standard: sus0Cr18Ni11Nb

3. German standard DIN standard: 1.45505,

4. European standard EN standard: X6CrNiNb18-10,

5. French standard NF standard: Z6CNNB18-10,

6. British standard BS standard: 0Cr18Ni11NbS20, 0Cr18Ni11NbS17,

7. Sweden: 2338NTR standard: AISC.

What are the characteristics of 0Cr18Ni11Nb stainless steel?

Basic Features:

(1) High temperature strength and high temperature plasticity

(2) Has excellent oxidation resistance and corrosion resistance

(3) Has good organizational stability

(4) Uniform chemical composition

(5) Good processing performance and welding performance

(6) High dimensional accuracy and surface quality

What is the chemical composition of 0Cr18Ni11Nb stainless steel?

⑴Carbon C: ≤0.08,

(2) Silicon Si: ≤1.00,

(3) Manganese Mn: ≤2.00,

⑷ Phosphorus P: ≤0.035,

⑸ Sulfur S: ≤0.030,

⑹ Chromium Cr: 17.00～19.00,

⑺Nickel Ni: 9.00～13.00,

⑾Other elements: Nb:10C~1.10

What are the mechanical properties of 0Cr18Ni11Nb stainless steel?

0Cr18Ni11Nb stainless steel is an austenitic steel alloy added with niobium as a stabilizing element. The alloy has good resistance to intergranular corrosion, so it is suitable for water and low temperature environments. 0Cr18Ni11Nb stainless steel has excellent heat resistance and corrosion resistance. Better mechanical properties than 304, which makes the alloy more suitable for high temperature use, 0Cr18Ni11Nb stainless steel also has good resistance to polythionic acid stress corrosion cracking, the specific mechanical properties are as follows:

Yield strength ≥ 205/MPa,

Tensile strength ≥ 520/ MPa,

Elongation ≥ 35%,

Hardness test: HBS≤187, HRB≤90, HV≤200

What are the physical properties of 0Cr18Ni11Nb stainless steel?

1. Density Density (20°C)/kg/dm3: "8.03,

2. Melting point/℃: 1398~1427,

3. Specific heat capacity (0~100℃)/kg/(kg.k): 0.5",

4. Thermal conductivity/w/(m.k)100℃-: "16.3",

5. Thermal conductivity/w/(m.k)500℃-: "22.2",

6. Coefficient of linear expansion/(10-6/k)0~100℃: "16.6",

7. Coefficient of linear expansion/(10-6/k)0~553℃: "18.6",

8. Resistivity (20°C)/(Ω.mm2/m): "0.73",

9. Longitudinal modulus of elasticity (20°C)/GPa: "193.

Is 0Cr18Ni11Nb stainless steel magnetic?

0Cr18Ni11Nb stainless steel is non-magnetic in the annealed state. In the annealed state, the magnetic permeability of 0Cr18Ni11Nb stainless steel is lower than 1.02. However, the magnetic permeability will change due to the composition, and it can only be hardened by cold work, which can be increased by cold work.

Can 0Cr18Ni11Nb stainless steel withstand high temperature?

0Cr18Ni11Nb is an austenitic stainless steel stabilized by niobium. Niobium is added to improve intergranular corrosion resistance. Its corrosion resistance in acid, alkali, salt and other corrosive media is the same as 321. It can be used as heat-resistant steel. Parts under corrosion conditions of 400~900 degrees, high temperature welding structural parts.

What is the fatigue strength of 0Cr18Ni11Nb stainless steel?

In fact, the fatigue strength of each metal is affected by factors such as corrosion environment, surface finish, product morphology and mean stress. For this reason, there is no way to find a specific figure to represent the fatigue strength value under all operating conditions. The fatigue limit of 0Cr18Ni11Nb stainless steel is about 35% of its tensile strength.

How is the weldability of 0Cr18Ni11Nb stainless steel? 

0Cr18Ni11Nb stainless steel as austenitic stainless steel is considered to be the easiest alloy steel to weld and can be welded with all fusions, also resistance welded. But there are two factors to consider when welding 0Cr18Ni11Nb stainless steel joints: 1) maintain its corrosion resistance, and 2) avoid cracking. Care must be taken to maintain the stabilizing elements in 0Cr18Ni11Nb stainless steel during welding. 0Cr18Ni11Nb stainless steel often loses columbium easily. It is necessary to avoid carbon elements in oil and other pollution sources and nitrogen elements in the air. Therefore, whether welding stable alloys or unstable alloys, care must be taken to keep clean and protect the inert gas.

What are the applications of 0Cr18Ni11Nb stainless steel?

0Cr18Ni11Nb application fields: mainly used in thermal power plants, petrochemical and other fields, such as making containers, pipes, heat exchangers, shafts, etc. It can also be used as a welding material.

How should 0Cr18Ni11Nb stainless steel be cleaned?

Regardless of corrosiveness, stainless steel must keep its surface clean during use and manufacture, even under normal working conditions.

Inert gas is used for processing during welding, and the scale and slag formed during welding are removed by stainless steel brushes. In the case of strict requirements, the welding area should be treated with a rust removal solution (such as a mixed solution of nitric acid and hydrofluoric acid) to remove scale and slag. After rust removal, the surface of the stainless steel should be thoroughly rinsed to wash away the residual acidic solution . Inland, light industrial materials that require less maintenance, with only sheltered areas sometimes requiring pressurized water cleaning. Heavy industry recommends frequent cleaning to remove accumulated dust that could eventually cause corrosion and mar the surface appearance of the stainless steel. Proper design facilitates cleaning. With rounded and inside corners, gap-free equipment facilitates cleaning and surface polishing.

What is 347H stainless steel?  

347H stainless steel is the twin steel of 0Cr18Ni11Nb stainless steel. 347H stainless steel has good welding ability, heat strength and machinability. Because 347H steel has uniform chemical composition and relatively stable internal structure, 347H stainless steel has high dimensional accuracy and Surface quality, 347H is mainly used in petrochemical industry, large boiler superheater.