1. What Material is 00Ni18Co12Mo4Ti2AI?
00Ni18Co12Mo4Ti2Al steel is a typical maraging steel, which is a kind of age-hardening plastic die steel. The carbon content of 00Ni18Co12Mo4Ti2Al steel is low. The impurities have a great influence on the properties of martensitic age-hardening steel, and the effect on the higher yield strength steel is more obvious.
This requires the steel to be vacuum smelted to reduce impurities, segregation, and air content in the ingot to ensure that the steel has better toughness and fatigue resistance.
1.1 00Ni18Co12Mo4Ti2AI Chemical Composition:
| Element | Content |
|---|---|
| Ni | 18% |
| Co | 12% |
| Mo | 4% |
| Ti | 2% |
| Al | 2% |
2. Cr23Ni18
National standard GB-T standard: digital grade: S3101O, new grade: 11Cr23Ni18, old grade: 1Cr23Ni18.
2.1 Chemical Composition of 1Cr23Ni18:
(1) Carbon C: ≤0.18, (2) Silicon Si: ≤1.00, (3 Manganese Mn: ≤2.00, ⑷ Phosphorus P: ≤0.035, (5) Sulfur S: ≤0.025, Chromium Cr: 22.00 ~ 25.00, nickel Ni: 17.00 ~ 20.00, (8) Molybdenum Mo: -, (9) nitrogen N: -, (10) Copper Cu: -, (11) other elements: -.
2.2 Physical Properties of 1Cr23Ni18:
Density (20℃)/kg/dm3:7.9,
② Melting point /℃:1400~1454,
③ Specific heat capacity (0~100℃)/kg/(kg.k):0.5,
④ Thermal conductivity /w/(m.k)100℃-:15.9,
⑤ Thermal conductivity /w/(m.k)500℃-:18.8,
⑥ linear expansion coefficient /(10-6/k)0~100℃:15.4,
⑦ Linear expansion coefficient /(10-6/k)0~524℃:19.2,
⑧ Resistivity (20℃)/(.mm2/m):1,
⑨ Longitudinal elastic modulus (20℃) /GPa:” 196,
⑩ Magnetic: none.
2.3 Mechanical Properties of 1Cr23Ni18:
⑴ Delivery status: bar cutting solid solution treatment, hot pressure processing not solid solution treatment, plate solid solution pickling,
⑵ Tensile strength (RM/MPa): 520,
⑶ Elongation strength (Rp0.2/MPa) : 205,
⑷ Elongation A/% : 40,
Section shrinkage (Z/%): 50.
3. 254SMO
254SMO is a high corrosion resistance super austenitic stainless steel, developed for halide and acid environments, widely used in high chloride ion media, seawater, and other harsh working conditions. In various industrial applications with acidic media, especially in acids containing halides, 254SMO is far superior to other stainless steels, and in some cases can be comparable to Hastelloy and titanium.
Low carbon content and high molybdenum content, so it has better resistance to spot corrosion and crevice corrosion resistance, excellent intergranular corrosion resistance, and is a cost-effective stainless steel, in the chemical industry, desulfurization and environmental protection and other fields widely used.
Super Austenitic Stainless Steel
3.1 Main Components of 254SMO:
254SMO Carbon (C) 0.02 or less, Manganese (Mn) of 1.00 or less, Nickel (Ni) 17.5 ~ 18.5, Silicon (Si) of 0.8 or less, Phosphorus (P) of 0.03 or less, Sulfur (S) of 0.01 or less, Chromium (Cr) 19.5 ~ 20.5, Copper (Cu) 0.5 ~ 1.0, Molybdenum (Mo) 6.0 ~ 6.5.
Due to its high molybdenum content, it has a very high resistance to spot corrosion and crevice corrosion. This grade of stainless steel was developed for use in halogenated environments such as seawater. 254SMO also has good resistance to uniform corrosion. Especially in acids containing halides, the steel is superior to ordinary stainless steel. Its C contains 0.03%, so it is called pure austenitic stainless steel. (0.01% is also called super austenitic stainless steel).
Super stainless steel is a kind of special stainless steel that, first of all, is different from ordinary stainless steel in chemical composition, it refers to a high-alloy stainless steel containing high nickel, high chromium, and high molybdenum. One of the more famous is the 254SMo containing 6%Mo, this kind of steel has very good local corrosion resistance, in seawater, inflation, there are gaps, low-speed erosion conditions, has good pitting resistance (PI≥40) and better stress corrosion resistance is a substitute material for Ni-based alloys and titanium alloys.
Secondly, in the performance of high temperature or corrosion resistance, it has more excellent high temperature or corrosion resistance and is irreplaceable in 304 stainless steel. In addition, from the classification of stainless steel, the metallographic structure of special stainless steel is a stable austenitic metallographic structure.
Because this special stainless steel is a high-alloy material, it is quite complex in the manufacturing process, and generally people can only rely on traditional processes to manufacture this special stainless steel, such as perfusion, forging, calendaring, and so on.
3.2 254SMO Corresponding Brand:
UNS S31254, DIN/EN 1.4547, 254smo, F44, 00Cr20Ni18Mo6CuN
3.3 254SMO Standard:
ASTM A240, ASME SA-240, B312/B269, A276
3.4 Physical Performance of the 254SMO:
Density: 8.24g/cm3, melting point: 1320-1390 ℃, magnetic: none
3.5 254SMO Mechanical Properties:
Tensile strength: b≥650Mpa, yield strength b≥310Mpa: elongation: ≥40%, hardness: 182-223 (HB)
3.6 Main Specifications of 254SMO:
254SMO seamless pipe, 254SMO steel plate, 254SMO round steel, 254SMO forgings, 254SMO flange, 254SMO ring, 254SMO welded pipe, 254SMO steel strip, 254SMO straight bar, 254SMO wire and matching welding material, 254SMO round cake, 254SMO flat steel, 254SMO Hexagon bar, 254SMO size head, 254SMO elbow, 254SMO tee, 254SMO workpiece, 254SMO bolt and nut, 254SMO fastener.
3.7 254SMO Welding Material:
ERNiCrMo-3 electrode, ENiCrMo-3 electrode