Jiangyin Kangrui Stainless Steel Products Co. Ltd.

Stainless Steel Tips

A stainless steel hot-rolled steel
Stainless steel hot-rolled steel sheet is hot-rolled stainless steel production process. Thickness of not more than 3mm for plate thickness greater than 3mm for plate. Used in chemical, petroleum, machinery, shipbuilding and other industries manufacturing corrosion-resistant parts, containers and equipment. The classification and grade as follows:
1. Austenitic steel
(1) 1Cr17Mn6Ni15N; (2) 1Cr18Mn8Ni5N; (3) 1Cr18Ni9; (4) 1Cr18Ni9Si3; (5) 0Cr18Ni9;
(6) 00Cr19Ni10; (7) 0Cr19Ni9N; (8) 0Cr19Ni10NbN; (9) 00Cr18Ni10N; (10) 1Cr18Ni12;
(11) 0Cr23Ni13; (12) 0Cr25Ni20; (13) 0Cr17Ni12Mo2; (14) 00Cr17Ni14Mo2;
(15) 0Cr17Ni12Mo2N; (16) 00Cr17Ni13Mo2N; (17) 1Cr18Ni12Mo2Ti; (18) 0Cr18Ni12Mo2Ti;
(19) 1Cr18Ni12Mo3Ti; (20) 0Cr18Ni12Mo3Ti; (21) 0Cr18Ni12Mo2Cu2;
(22) 00Cr18Ni14Mo2Cu2; (23) 0Cr19Ni13Mo3; (24) 00Cr19Ni13Mo3; (25) 0Cr18Ni16Mo5;
(26) 1Cr18Ni9Ti; (27) 0Cr18Ni10Ti; (28) 0Cr18Ni11Nb; (29) 0Cr18Ni13Si4
2. Austenitic - ferritic steel
(30) 0Cr26Ni5Mo2; (31) 00Cr18Ni5Mo3Si2;
3. Ferritic steel
(32) 0Cr13Al; (33) 00Cr12; (34) 1Cr15; (35) 1Cr17; (36) 1Cr17Mo; (37) 00Cr17Mo;
(38) 00Cr18Mo2; (39) 00Cr30Mo2; (40) 00Cr27Mo
4. Martensitic steel
(41) 1Cr12; (42) 0Cr13; (43); 1Cr13; (44) 2Cr13; (45) 3Cr13; (46) 4Cr13;
(47) 3Cr16; (48) 7Cr17
5. Precipitation hardening steel
(49) 0Cr17Ni7Al
Second, the stainless steel cold-rolled steel
Stainless steel cold-rolled steel sheet is cold-rolled stainless steel production process, the thickness of not more than 3mm for plate thickness greater than 3mm for plate. For the production of corrosion-resistant parts, petroleum, chemical piping, containers, medical equipment, marine equipment, its classification and grade as follows:
1. Austenitic steel
In addition to some of the same with the hot outside (29 species), there are: (1) 2Cr13Mn9Ni4 (2) 1Cr17Ni7 (3) 1Cr17Ni8
2. Austenitic - ferritic steel
In addition to some of the same with the hot outside (2 species), and: (1) 1Cr18Ni11Si4AlTi (2) 1Cr21Ni5Ti
3. Ferritic steel
In addition to some of the same with the hot outside (10 species), as well: 00Cr17
4. Martensitic steel
In addition to some of the same with the hot outside (8), and 1Cr17Ni2
5. Precipitation hardening steel: hot rolled section with
Third, ferritic, austenitic, martensitic Profile
We all know that solid metals and alloys are crystalline, which is in its internal atomic arrangement according to certain rules, and arranged generally three ways, namely: body-centered cubic lattice structure, the face-centered cubic lattice structure and the hexagonal close-packed lattice structure . Polycrystalline metal is composed of its polycrystalline structure is formed during crystallization of the metal. Composition of iron-carbon alloy of iron with two lattice structures: 910 .The following is a body-centered cubic lattice structure of - Fe, 910 for more than a face-centered cubic lattice structure of the - iron. If pushed carbon atoms to the iron lattice, without damaging the iron has the lattice structure, this material is called solid solution. Carbon dissolved into the - solid solution of iron in the formation of ferrite, said its ability to very low dissolved carbon, the maximum solubility of not more than 0.02%. The carbon dissolved into - iron in the formation of solid solution called austenite, the higher its ability to dissolve carbon up to 2%. Is the iron-carbon alloy austenitic high temperature phase.
Steel in the austenite formed at high temperature, cooling to below 727 supercooled austenite becomes unstable. Cooling rate as in the great cold to 230 or less, then the carbon atoms in austenite could no longer spread, austenite will transform into a direct carbon-supersaturated -solid solution, known as martensite . As the carbon content is too saturated, causing increased strength and hardness of martensite, lower plasticity, brittleness increases.
Mainly from the corrosion resistance of stainless steel chrome. Experiments show that only the chromium content exceeds 12% of the corrosion resistance of steel will be greatly improved, therefore, the amount of chromium in the stainless steel is generally not less than 12%. As the chromium content increased, the steel also has a great impact on the organization, when high carbon content chromium little time, Chrome will make iron-carbon equilibrium, phase region on the map shrink or even disappear, such as ferritic stainless steel tissue structure, phase transition does not occur when heated, as ferritic stainless steel.
When the chromium content is low (but higher than 12%), high content of carbon, alloy cooling from high temperatures, easy to form martensite, so that this type of steel for the martensitic stainless steel.
Nickel -phase region can be extended to make steel with austenite. If the nickel content enough, the steel austenitic at room temperature also has the organizational structure, describes this kind of steel to austenitic stainless steel