What is 022cr18ni14mo3 GB/ T 20878-2007
This is a sharing of steel knowledge, but also a sharing of my real experience. First of all, I am very grateful to a friend of mine, Mr. Rakhiyal, who gave me the opportunity to understand this material well, he is very patient and professional, thank him again. Let's take a look at it next.
| Grade | 022Cr18Ni14Mo3 |
| China ISC | S31793 |
| old grade | |
Corresponding standard | GB /T 20878-2007 Stainless and heat-resisting steels - Designation and chemical composition |
| Category | Austenitic stainless steel |
| Performance | preservative |
| Label | Austenitic stainless steel |
The corresponding grade of 00Cr18Ni14Mo3:
1. National standard GB-T standard: digital grade: S31793, new grade: 022cr18ni14Mo3, old grade: 00Cr18ni14mo3,
2. American Standard: ASTMA Standard: One, SAE Standard: One, UNS Standard: 724L,
3. Japanese standard JIS standard: sus 316LMoD,
4. German standard DIN standard: 1. 4435,
5. European standard EN standard: X2CrNiMo18-14-3,
British Standard BS Standard: 316S33,
Swedish/NTR standard: APMLD2.
| Element | C | Si | Mn | P | S | Cr | Ni | Cu | Mo | N |
|---|---|---|---|---|---|---|---|---|---|---|
| Minimum | - | - | - | - | - | 17 | 13 | - | 2.25 | - |
| Maximum | 0.03 | 1 | 2 | 0.025 | 0.01 | 19 | 15 | 0.5 | 3.5 | 0.1 |
Yes, this is consistent with the data in the book
Physical properties
Density: 7.90g/cm3
Elastic modulus: 200GPa
Resistivity: λ / W•(m•C)-1
Thermal expansion coefficient (20 - 100°C): 15.0 a10-6K-1
Main features: It has excellent resistance to welding hot cracks and intergranular corrosion.
Application example: used in petrochemical, hydropower, nuclear power, offshore oil and gas, aerospace and military industry, machinery manufacturing, food equipment, construction and installation and other industries.
Varieties and specifications: forgings, bars, plates, strips, rings, wires, bolts, springs, etc. are negotiated and supplied, and can be produced according to customer requirements.
Urea steel 316Lmod is a stainless steel developed for urea production on the basis of 316L, with additional restrictions on the minimum content of Cr, Ni and Mo; the purpose is to make the stainless steel obtain full austenite structure after final heat treatment, and make The ferrite content is not more than 0.6%, and the requirements for intergranular corrosion tendency test and selective corrosion are also put forward.
Kind tips: 022Cr18Ni14Mo3 is very rare and expensive, so foreign friends you must confirm with the seller again and again when purchasing, so as to prevent the other party from using other materials such as 316l mod instead (the price is much cheaper).
If you have any steel knowledge you want to know, please feel free to leave a message~
