Stainless steel classification
Stainless steels can generally be categorized into 7 categories:
- Chromium is their major alloying element
- Ductility and formability less than austenitic grades
- Magnetic
- Highly corrosion resistant, less durable than austenitic
- Cannot be hardened by heat treatment
- Contain between 10.5%-27% chromium and very little nickel
- Common grades: part of the 400 series like 409, 410S, 430
- Comprise of 70% of total stainless steel production
- Hardenable by cold working
- Usually non-magnetic
- High hardness and yield strength
- Contain a maximum of 0.015% carbon, minimum of 16% chromium and sufficient nickel and/or manganese
- Superaustenitic stainless steels (AL-6XN and 254 SMO) have great resistance to chloride pitting and crevice corrosion
- Common grades: 300 series like 304, 316, 320, 321, 347,309
- Highly machinable
- Very strong and tough
- Can be hardened by heat treatment
- Magnetic
- Contains chromium (12-14%), molybdenum (0.2-1%), nickel, (0 - < 2%), carbon (0.1 - < 1%)
- Common grades: 410, 420, 440
- Often divided into 3 sub classes
- Lean Duplex
- Standard Duplex
- SuperDuplex
- Mixed microstructure of austenite and ferrite about a 50/50 mix
- Higher strength and better stress corrosion cracking resistance than most austenitic alloys
- Greater toughness than ferritic alloys, especially at low temperatures
- Good resistance to localized corrosion, particularly pitting, crevice corrosion and stress corrosion cracking
- Common grades: 2205 and 2507
- Designed to be formable in the solution annealed condition
- Can be hardened by heat treatment
- Contain chromium and nickel as major alloying elements
- Corrosion resistance is usually better than that of straight chromium ferritics
- Most common grade is 17-4PH
- Same structure as austenitic alloys
- Enhanced levels of elements like chromium, nickel, molybdenum, copper and nitrogen
- Superior strength and corrosion resistance
- Common Grades: AL-6XN and 254 SMO
- Structure and properties similar to ferritic alloys
- Enhanced levels of chromium and molybdenum
- Increased resistance to high temperatures and corrosive environments like seawater
About us
Shanghai Yikai Metal Products Co.,Ltd is a influential company in local area, in which specialize in manufacturing stainless steel products, pure titanium, titanium alloy ,plating titanium stainles steel products, nickel and nickel alloy products, to alwasy insist to in the principles with customer's satisfaction first level , it can be fabricated typicals such as sheet/plate, bar/rod, pipe/tube seamless /welded round /square with all metal materials if you can draw it or send or fax to us, it could be realized by our efforts. We have perfect service system that staff 24h on call , fast delivery. If you have needs on products , please let me know .
Shanghai Yikai Metal Products Co.,Ltd is a influential company in local area, in which specialize in manufacturing stainless steel products, pure titanium, titanium alloy ,plating titanium stainles steel products, nickel and nickel alloy products, to alwasy insist to in the principles with customer's satisfaction first level , it can be fabricated typicals such as sheet/plate, bar/rod, pipe/tube seamless /welded round /square with all metal materials if you can draw it or send or fax to us, it could be realized by our efforts. We have perfect service system that staff 24h on call , fast delivery. If you have needs on products , please let me know .
Stainless steels can generally be categorized into 7 categories:
- Chromium is their major alloying element
- Ductility and formability less than austenitic grades
- Magnetic
- Highly corrosion resistant, less durable than austenitic
- Cannot be hardened by heat treatment
- Contain between 10.5%-27% chromium and very little nickel
- Common grades: part of the 400 series like 409, 410S, 430
- Comprise of 70% of total stainless steel production
- Hardenable by cold working
- Usually non-magnetic
- High hardness and yield strength
- Contain a maximum of 0.015% carbon, minimum of 16% chromium and sufficient nickel and/or manganese
- Superaustenitic stainless steels (AL-6XN and 254 SMO) have great resistance to chloride pitting and crevice corrosion
- Common grades: 300 series like 304, 316, 320, 321, 347,309
- Highly machinable
- Very strong and tough
- Can be hardened by heat treatment
- Magnetic
- Contains chromium (12-14%), molybdenum (0.2-1%), nickel, (0 - < 2%), carbon (0.1 - < 1%)
- Common grades: 410, 420, 440
- Often divided into 3 sub classes
- Lean Duplex
- Standard Duplex
- SuperDuplex
- Mixed microstructure of austenite and ferrite about a 50/50 mix
- Higher strength and better stress corrosion cracking resistance than most austenitic alloys
- Greater toughness than ferritic alloys, especially at low temperatures
- Good resistance to localized corrosion, particularly pitting, crevice corrosion and stress corrosion cracking
- Common grades: 2205 and 2507
- Designed to be formable in the solution annealed condition
- Can be hardened by heat treatment
- Contain chromium and nickel as major alloying elements
- Corrosion resistance is usually better than that of straight chromium ferritics
- Most common grade is 17-4PH
- Same structure as austenitic alloys
- Enhanced levels of elements like chromium, nickel, molybdenum, copper and nitrogen
- Superior strength and corrosion resistance
- Common Grades: AL-6XN and 254 SMO
- Structure and properties similar to ferritic alloys
- Enhanced levels of chromium and molybdenum
- Increased resistance to high temperatures and corrosive environments like seawater
About us
Shanghai Yikai Metal Products Co.,Ltd is a influential company in local area, in which specialize in manufacturing stainless steel products, pure titanium, titanium alloy ,plating titanium stainles steel products, nickel and nickel alloy products, to alwasy insist to in the principles with customer's satisfaction first level , it can be fabricated typicals such as sheet/plate, bar/rod, pipe/tube seamless /welded round /square with all metal materials if you can draw it or send or fax to us, it could be realized by our efforts. We have perfect service system that staff 24h on call , fast delivery. If you have needs on products , please let me know .
Shanghai Yikai Metal Products Co.,Ltd is a influential company in local area, in which specialize in manufacturing stainless steel products, pure titanium, titanium alloy ,plating titanium stainles steel products, nickel and nickel alloy products, to alwasy insist to in the principles with customer's satisfaction first level , it can be fabricated typicals such as sheet/plate, bar/rod, pipe/tube seamless /welded round /square with all metal materials if you can draw it or send or fax to us, it could be realized by our efforts. We have perfect service system that staff 24h on call , fast delivery. If you have needs on products , please let me know .
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