POSCO operates an integrated production system that ranges from steel making to hot rolling and cold rolling, producing two million tons of stainless steel products every year. Stainless steel products can be classified into austenitic stainless steel, ferritic stainless steel and martensitic stainless steel according to their alloy components and tissue structure. Their typical applications include car exhaust pipes, kitchen appliances, electronics and construction materials. Emerging applications include eco-friendly sectors, such as EV battery cases and LNG.
Applications
Products, Characteristics & Applications
Austenitic Series (300 Series)
This stainless steel is the most widely used of all its kinds. It contains chrome and nickel and features good formability, weldability and anti-corrosion. The most common austenitic stainless steel is Type 304. There are also other notable austenitic stainless steels-Types 316L, 321 and 304J1 to name a few-produced by adding different alloy elements such as Mo, Ti and Cu. Main applications of austenitic stainless steel include kitchen utensils, construction and chemical instruments.
- 301/301L – The main chemical composition of Type 301 is 17Cr – 7Ni and Type 301L is 17Cr – 7Ni – LC. This stainless steel contains less Cr and Ni than Type 304 and can have higher strength through hot rolling.
- 304 – The main chemical composition of Type 304 is 18Cr – 8Ni. The most extensively used stainless steel featuring good resistance to corrosion and heat among other mechanical properties.
- 304L – The main chemical composition is 18Cr – 9Ni – LC. This stainless steel contains less carbon than 304 and has good resistance to intergranular corrosion
- 304J1 – The main chemical composition is 17Cr – 8Ni – 2Cu. This stainless steel has good formability as it contains Cu.
- 316 – The main chemical composition is 18Cr – 12Ni – 2Mo.This stainless steel contains Mo and increased Ni to have good resistance to corrosion. It can also withstand high temperatures
- 316L – The main chemical composition is 18Cr – 12Ni – 2Mo – LC. This stainless steel contains less carbon than 316 and, therefore, has good resistance to intergranular corrosion.
- 316LN – The main chemical composition is 18Cr – 11Ni – 2Mo – 0.13N (thick plates). This stainless steel is made by adding nitrogen to 316L steel.
- 321 – The main chemical composition is 18Cr – 9Ni – 0.3Ti. This stainless steel is made by adding Ti to 304 steel for better resistance to intergranular corrosion.
- XM15J1 – The main chemical composition is 19Cr – 13Ni – 3.5Si (cold rolled). This stainless steel contains Si for better resistance to high-temperature salt corrosion and oxidation.
- 310S – The main chemical composition is 22Cr – 20Ni.This stainless steel contains increased Cr and Ni for good resistance to high-temperature oxidation and higher strength at high temperatures.
Product Specifications
This product specification is subject to change, so please check the latest specifications when ordering or consult with the person in charge.
| Type | Chemical Composition (%) | Mechanical Properties | Physical Properties | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
KS(JIS) |
POSCO |
C |
CR |
Ni |
MO |
Others |
Yield Strength (0.2%)(N/mm²) |
Tensile Strength (N/mm²) |
Elongation (%) |
Hardness (Hv) |
Specific Heat J/g °C |
Specific Gravity |
Thermal Expansion Coefficient W/m·°C (20-100°C |
Thermal Conductivity W/m·°C (100°C) |
|
301 |
301 |
~0.15 |
16.0 ~ 18.0 |
6.00 ~ 8.00 |
– |
– |
205~ |
520~ |
40~ |
~218 |
0.50 |
7.93 |
16.9 |
16.3 |
|
301 L |
301 L |
0.030 |
16.0 ~ 18.0 |
6.00 ~ 8.00 |
– |
N ~0.2
|
215~ |
550~ |
45~ |
~218 |
0.50 |
7.93 |
16.9 |
16.3 |
|
304 |
304 |
0.08 |
18.0 ~ 20.0 |
8.00 ~ 10.50 |
– |
– |
205~ |
520~ |
40~ |
~200 |
0.50 |
7.93 |
17.3 |
16.3 |
|
304 L |
304 L |
~0.030 |
18.0 ~ 20.0 |
9.00 ~ 13.00 |
– |
– |
175~ |
480~ |
40~ |
~200 |
0.50 |
7.93 |
17.3 |
16.3 |
|
304 LN |
304 LN |
~0.030 |
17.0 ~ 19.0 |
8.5 ~ 11.5 |
– |
N 0.12 ~ 0.22 |
245~ |
550~ |
40~ |
~200 |
0.50 |
7.93 |
17.3 |
16.3 |
|
304 N1 |
304 N1 |
~0.08 |
18.0 ~ 20.0 |
7.00 ~ 10.50 |
– |
N 0.10 ~ 0.25 |
275~ |
550~ |
35~ |
220~ |
0.50 |
7.93 |
17.3 |
16.3 |
|
304 J1 |
304 J1 |
0.08 |
15.0 ~ 18.0 |
6.0 ~ 9.0 |
– |
Cu 1.0 ~ 3.0 |
155~ |
450~ |
40~ |
~200 |
0.50 |
7.93 |
17.3 |
16.3 |
|
305 |
305 EG |
0.08 |
15.0 ~ 17.0 |
13.0 ~ 15.0 |
– |
– |
175~ |
480~ |
40~ |
~200 |
0.50 |
7.93 |
17.3 |
16.3 |
|
309 S |
309 S |
0.08 |
22.0 ~ 24.0 |
12.0 ~ 15.0 |
– |
– |
205~ |
520~ |
40~ |
~200 |
0.50 |
7.98 |
15.9 |
14.2 |
|
310 S |
310 S |
~0.08 |
24.0 ~ 26.0 |
19.0 ~ 22.0 |
– |
– |
205~ |
520~ |
40~ |
~200 |
0.50 |
7.98 |
15.9 |
14.2 |
|
316 |
316 |
~0.08 |
16.0 ~ 18.0 |
10.0 ~ 14.0 |
2.00 ~ 3.00 |
– |
205~ |
520~ |
40~ |
~200 |
0.50 |
7.98 |
15.9 |
16.3 |
|
316 L |
316 L |
~0.08 |
16.0 ~ 18.0 |
12.0 ~ 15.0 |
2.00 ~ 3.00 |
– |
175~ |
480~ |
40~ |
~200 |
0.50 |
7.98 |
15.9 |
16.3 |
|
316 LN |
316 LN |
~0.03 |
16.5 ~ 18.5 |
10.5 ~ 14.5 |
2.00 ~ 3.00 |
N 0.12 ~ 0.22 |
245~ |
550~ |
40~ |
~220 |
0.50 |
7.98 |
15.9 |
16.3 |
|
316 Ti |
316 Ti |
0.08 |
16.0 ~ 18.0 |
10.0 ~ 14.0 |
2.00 ~ 3.00 |
Ti 5xC% ~ |
205~ |
520~ |
40~ |
~200 |
0.50 |
7.98 |
15.9 |
16.3 |
|
317 L |
317 L |
0.03 |
18.0 ~ 22.0 |
11.0 ~ 15.0 |
3.00 ~ 4.00 |
– |
175~ |
480~ |
40~ |
~200 |
0.486 |
7.98 |
16.5 |
14.4 |
|
321 |
321 |
~0.08 |
17.0 ~ 19.0 |
9.00 ~ 13.0 |
– |
Ti 5xC% ~ |
205~ |
520~ |
40~ |
~200 |
0.50 |
7.93 |
16.7 |
16.1 |
|
347 |
347 |
0.08 |
17.0 ~ 19.0 |
9.00 ~ 13.0 |
– |
Nb10xC% ~ |
205~ |
520~ |
40~ |
~200 |
0.50 |
7.98 |
16.7 |
16.1 |
|
XM15J1 |
XM15J1 |
~0.08 |
15.0 ~ 20.0 |
11.50 ~ 15.0 |
– |
Si 3.0 ~ 5.0 |
205~ |
520~ |
40~ |
~218 |
0.50 |
7.75 |
13.8 |
16.3 |
Ferritic Series (400 Series)
For ferritic steel, chrome is one of its alloy components. This gives the steel low thermal expansion and a good resistance to corrosion. The most common austenitic stainless steel is Type 430. There are also other notable austenitic stainless steels-Types 409L, 430J1L and 444 to name a few-produced by adding different alloy elements such as Ti, Nb and Mo. Its main applications include exhaust systems and home appliances.
- 430 – The main chemical composition is 16Cr – 0.05C. The most commonly used ferritic stainless steel featuring good formability and resistance to oxidation
- 409L – The main chemical composition is 11Cr – 02Ti – LCN. This stainless steel contains Ti for better weldability and machinability.
- 410L – The main chemical composition is 12Cr – LCN.This stainless steel is basically 410 steel, but with a reduced carbon content for better weldability, toughness and machinability.
- 429EM – The main chemical composition is 14Cr – 1Si – 0.2Ti – LC. This product contains newly added Si, Ti, Mn, Cu and others and reduced C and N for better strength at high temperatures, better resistance to oxidation and improved formability.
- 430J1L – The main chemical composition is 19Cr – 0.5Cu – 0.4Nb – LCN. This product is made by adding Cu and Nb to 430 steel for better resistance to corrosion, better formability and weldability as well as improved properties at high temperatures.
- 436L – The main chemical composition is 18Cr – 1Mo – 0.3Ti – LCN. Addition of Mo, Ti and Nb assures good resistance to corrosion, machinability and weldability.
- 439 – The main chemical composition is 18Cr – 0.4Ti – LCN. This stainless steel contains Ti that can improve resistance to corrosion, machinability and weldability.
- 444 – The main chemical composition is 19Cr – 2Mo – 0.3Nb – LCN. This product contains high Cr and Mo that can improve resistance to intergranular corrosion and stress corrosion cracking.
- 445NF – The main chemical composition is 21Cr – 0.3Ti – 0.4Cu – Si,Nb. This high Cr content stainless steel has good resistance to corrosion and good formability.
- 446M – The main chemical composition is 26Cr – 2Mo – 0.3 (Ti, Nb) – LCN (cold rolling). This product contains high Cr and Mo that can improve resistance to corrosion.
Product Specifications
This product specification is subject to change, so please check the latest specifications when ordering or consult with the person in charge.
| Type | Chemical Composition (%) | Mechanical Properties | Physical Properties | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
KS(JIS) |
POSCO |
C |
CR |
Ni |
MO |
Others |
Yield Strength (0.2%)(N/mm²) |
Tensile Strength (N/mm²) |
Elongation (%) |
Hardness (Hv) |
Specific Heat J/g °C |
Specific Gravity |
Thermal Expansion Coefficient W/m·°C (20-100°C |
Thermal Conductivity W/m·°C (100°C) |
|
409L |
409L |
0.03 |
10.50 ~ 11.75 |
– |
– |
Ti 6xC% ~ 0.75 |
175~ |
360~ |
25~ |
~175 |
0.46 |
7.75 |
6.5 |
24.9 |
|
– |
HIPOS |
~0.03 |
12 ~ 14 |
– |
– |
Si~1.3 |
175~ |
360~ |
22~ |
~180 |
– |
– |
– |
– |
|
410L |
410L |
~0.03 |
11.0 ~ 13.5 |
– |
– |
– |
195~ |
360~ |
22~ |
~200 |
0.46 |
7.75 |
9.9 |
25.1 |
|
– |
429EM |
0.020 |
13.0 ~ 15.0 |
– |
– |
Si ~1.5 |
205~ |
400~ |
25~ |
~180 |
0.456 |
7.62 |
10.6 |
20.9 |
|
430 |
430 |
~0.12 |
16.0 ~ 18.0 |
– |
– |
– |
205~ |
450~ |
22~ |
~200 |
0.46 |
7.70 |
10.5 |
23.9 |
|
430J1L |
430J1L |
~0.025 |
16.0 ~ 20.0 |
– |
– |
N ~ 0.025 |
205~ |
390~ |
22~ |
~200 |
0.46 |
7.70 |
10.4 |
26.2 |
|
430Ti |
430Ti |
~0.02 |
19.5 ~ 20.5 |
– |
– |
Ti 0.3 ~ 0.6 |
206~ |
422~ |
25~ |
~180 |
0.46 |
7.70 |
10.4 |
26.4 |
|
436L |
436L |
~0.025 |
16.0 ~ 19.0 |
– |
0.75 ~ 1.5 |
Ti, Nb, Zr 8x(C%+N%)~0.8 |
245~ |
410~ |
20~ |
~230 |
0.46 |
7.70 |
9.3 |
23.9 |
|
– |
439 |
0.03 |
17.0 ~ 19.0 |
– |
– |
Ti 0.2 ~ 1.0 |
175~ |
400~ |
22~ |
~175 |
0.46 |
7.70 |
10.5 |
26.4 |
|
– |
441 |
~0.03 |
17.5 ~ 18.5 |
~1.0 |
– |
Si~1.0 Ti 0.1~0.6 Nb 9C+0.3~1.0 |
250 |
430 ~ 630 |
25~ |
~175 |
0.462 |
7.60 |
10.1 |
27.1 |
|
444 |
444 |
~0.025 |
17.0 ~ 20.0 |
– |
1.75 ~ 2.5 |
Ti, Nb, Zr 8x(C%+N%)~0.8 |
245~ |
410~ |
20~ |
~230 |
0.427 |
7.75 |
11.0 |
26.8 |
|
– |
445NF |
~0.015 |
20.0 ~ 23.0 |
~0.5 |
– |
Ti+Nb 10(C+N)~0.6 |
245~ |
410~ |
22~ |
~200 |
0.44 |
7.74 |
10.5 |
23 |
|
446M |
446M |
0.015 |
25 ~ 28.5 |
~0.3 |
1.5 ~ 2.5 |
Ti+Nb 8~(C+N) |
270~ |
430~ |
20~ |
~210 |
0.5 |
7.75 |
11.0 |
18.84 |
Martensitic Series
Martensitic steel contains 12 percent of chrome. Its higher content of carbon compared to other types of steel can give it greater hardness through quenched heat treatment. Its main applications include cutlery and disc brakes.
- 410 – The main chemical composition is 13Cr – 0.04C. This steel gets hardened when heat-treated. With good machinability and high strength
- 410B – The main chemical composition is 12Cr – 0.4Ni. This product can have varied quenched hardness by changing Mn or Ni content from 410.
- 420N1 – The main chemical composition is 13Cr – 0.1C – 0.1N. This product has higher machinability, higher resistance to corrosion and higher strength than 420J1.
- 420J2 – The main chemical composition is 13Cr – 0.3C. This stainless steel has a higher quenched hardness than 420J1.
Product Specifications
This product specification is subject to change, so please check the latest specifications when ordering or consult with the person in charge.
| Type | Chemical Composition (%) | Mechanical Properties | Physical Properties | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
KS(JIS) |
POSCO |
C |
CR |
Ni |
MO |
Others |
Yield Strength (0.2%)(N/mm²) |
Tensile Strength (N/mm²) |
Elongation (%) |
Hardness (Hv) |
Specific Heat J/g °C |
Specific Gravity |
Thermal Expansion Coefficient W/m·°C (20-100°C |
Thermal Conductivity W/m·°C (100°C) |
|
410 |
410 |
~0.15 |
11.5 ~ 13.5 |
– |
– |
– |
205~ |
440~ |
20~ |
~210 |
0.46 |
7.70 |
9.9 |
24.9 |
|
– |
410B |
~0.15 |
11.5 ~ 13.5 |
0.6 |
– |
– |
205~ |
440~ |
20~ |
~210 |
0.46 |
7.75 |
9.9 |
24.9 |
|
– |
420N1 |
~0.17 |
12.0 ~ 14.0 |
– |
– |
N~0.14 |
225~ |
520~ |
18~ |
~218 |
0.46 |
7.75 |
9.9 |
23.8 |
|
420J2 |
420J2 |
0.26 ~ 0.4 |
12.0 ~ 14.0 |
– |
– |
– |
225~ |
540~ |
18~ |
~247 |
0.46 |
7.75 |
10.3 |
23.8 |
Duplex Series
Duplex steel combines austenitic and ferritic steels to provide higher strength and better resistance to corrosion. It is extensively used for industrial purposes including water tanks and desalination installations.
- 329LD – The main chemical composition is 20Cr – 2.5Ni – 1.4Mo – N. This is Ni and Mo saving lean duplex steel, featuring good resistance to corrosion and intergranular corrosion.
- 329J3L – The main chemical composition is 22Cr – 5Ni – 3Mo – 0.15N. This product contains many elements that can improve resistance to corrosion, including Cr, Mo and N. Ideal for applications requiring resistance to chloride, SCC, pitting, crevice, abrasion or erosion.
Product Specifications
This product specification is subject to change, so please check the latest specifications when ordering or consult with the person in charge.
| Type | Chemical Composition (%) | Mechanical Properties | Physical Properties | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
KS(JIS) |
POSCO |
C |
CR |
Ni |
MO |
Others |
Yield Strength (0.2%)(N/mm²) |
Tensile Strength (N/mm²) |
Elongation (%) |
Hardness (Hv) |
Specific Heat J/g °C |
Specific Gravity |
Thermal Expansion Coefficient W/m·°C (20-100°C |
Thermal Conductivity W/m·°C (100°C) |
|
329J3L |
329J3L |
~0.03 |
21.0 ~ 24.0 |
4.5 ~ 6.5 |
2.5 ~ 3.5 |
N 0.08 ~ 0.20 |
450~ |
620~ |
18~ |
~320 |
0.4 |
7.8 |
13.7 |
19.0 |
|
329LD |
329LD |
~0.03 |
19.0 ~ 22.0 |
2.0 ~ 4.0 |
1.0 ~ 2.0 |
N 0.14 ~ 02
Mn 2.0 ~ 4.0
|
450 |
620~ |
25~ |
~310 |
0.52 |
7.71 |
13.2 |
16.5 |
BIS Certified
| Steel Product | Posco Item (Item code) | Steel Works | Items | BIS Grade | Thickness | Width | Length |
|---|---|---|---|---|---|---|---|
|
Stainless Steel Plate, Sheet and Strip |
STS |
Pohang |
Strips (Coil) |
Hot Rolled Stainless Steel: Ferritic Type: 405, 430, 409, 409M, 410S, 439, 409Ti1, 409Ti2, 409Ti3, 409Ti4, 409Ti5, 410S1, 410S2, 410S3, 429, 429Nb, 430Ti, 430Ti1, 434, 436, 436L, 436L1, 439Ti1, 439Ti2, 441, 442, 443, 444, 445, 445L1, 445L2, 446S1, 446S2, 446S3 Austenitic Type: 301L, 301LN, 304H, 304LN, 304N, 305, 305Cu, 309S, 310S, 316H, 316LN, 317, 317L, 304, 304L, 301, 302, 316, 316L, 316Ti, 309, 310, 321, 347, 304Ce, 304Cu, 304CuW, 304Mn1, 304Mn2, 304N2, 304Nb, 308Ce, 309H, 309Nb, 309HNb, 310H, 310N, 310Nb, 310HNb, 310MoLN, 312, 316Nb, 316N1, 316N2, 317LM Martensitic Type: 403, 410, 415, 420 S1, 420 S2, 420 S3, 422, 431, 440 Surface Finish: 0 & No. 1 Cold Rolled Stainless Steel: Ferritic Type:405, 430, 409, 409M, 410S, 439, 409Ti1, 409Ti2, 409Ti3, 409Ti4, 409Ti5, 410S1, 410S2, 410S3, 429, 429Nb, 430Ti, 430Ti1, 434, 436, 436L, 436L1, 439Ti1, 439Ti2, 441, 442, 443, 444, 445, 445L1, 445L2, 446S1, 446S2, 446S3 Austenitic Type: 301L, 301LN, 304H, 304LN, 304N, 305, 305Cu, 309S, 310S, 316H, 316LN, 317, 317L, 304, 304L, 301, 302, 316, 316L, 316Ti, 309, 310, 321, 347, 304Ce, 304Cu, 304CuW, 304Mn1, 304Mn2, 304N2, 304Nb, 308Ce, 309H, 309Nb, 309HNb, 310H, 310N, 310Nb, 310HNb, 310MoLN, 312, 316Nb, 316N1, 316N2, 317LM Martensitic Type: Nil Surface Finish: CR, 2D, 2B, BA, No.3, No.4, No. 6, No.7 & No.8 |
Hot Rolled: 2.0 ~ 8.0 mm
Cold Rolled: 0.30 ~ 3.0 mm
|
Hot Rolled: 600 ~ 1,600 mm
Cold Rolled: 40 ~ 1,580 mm
|
Coil Form |
|
Stainless Steel Plate, Sheet and Strip |
STS |
P-Thainox |
Strips (Coil) & Sheets |
Cold rolled Stainless Sheets and Strips: Ferritic Stainless Steel: 405, 430, 409Ti1, 409Ti2, 409Ti3, 409Ti4, 409Ti5, 410S1, 410S2, 410S3, 429, 429Nb, 430Ti, 430Ti1, 434, 436, 436L, 436L1, 439Ti1, 439Ti2, 441, 442, 443, 444, 445, 445L1, 445L2, 446S1, 446S2, 446S3 Austenitic: 301, 302, 304, 304L, 309, 310, 316, 316L, 316Ti, 321, 347, 304Ce, 304Cu, 304CuW, 304Mn1, 304Mn2, 304N2, 304Nb, 308Ce, 309H, 309Nb, 309HNb, 310H, 310N, 310Nb, 310HNb, 310MoLN, 312, 316Nb, 316N1, 316N2, 317LM Surface Finish: 2B, 2D, BA & CR |
0.3 ~ 5.0 mm |
Coil: 30 ~ 1,350 mm
Sheet: 500 ~ 1,350 mm |
Coil Form & for Sheet: 400 ~ 6,000 mm |
|
Stainless Steel Plate, Sheet and Strip |
STS |
POSCO-MS, Korea |
Strips (Coil) |
Cold rolled Stainless Strip: Ferritic Stainless Steel: 430, 439 & 410S Austenitic: 301, 304, 304L, 316L & 321 Surface Finish: CR, 2D, 2B & BA Polish Finish: No.4 |
0.07 ~ 3.5 mm |
12.7 ~ 1,300 mm |
Coil Form |
|
Stainless Steel Plate, Sheet and Strip |
STS |
P-VST, Vietnam |
Strips (Coil) |
Cold rolled Stainless Strip: Ferritic Stainless Steel: 430, 439, 409, 441, 436L, 436J1L, 410S & 420J2 Austenitic: 301, 304, 304L, 316L & 321 Surface Finish: CR, 2D, 2B & BA |
0.08 ~ 3.0 mm |
4 ~ 1,550mm |
Coil Form |
|
Stainless Steel Plate, Sheet and Strip |
STS |
P-Assan TST, Turkey |
Strips (Coil) |
Cold rolled Stainless Strip: Ferritic Stainless Steel: 430 Austenitic: 304, 304L, 316L Surface Finish: 2B, BA . Ferritic Stainless Steel: 409, 439, 441 & 436L Surface Finish: 2B, BA, 2D |
0.25 ~ 4.5 mm |
100 ~ 1,550 mm |
Coil Form |
Notes: The product standards are for reference. Please be sure to confirm the recent standards when making orders with Technical Services.