双向不锈钢
DOUBLE PHASE STAINLESS STEEL
Classification, Brand and Standard of Duplex Stainless Steel
1. Dual-phase non-pound steel can be generally divided into low-alloy, medium-alloy, high-alloy and super-duplex stainless steel models.
2. The approximate values of common duplex stainless steel grades and national grades are compared as follows:
|
Model |
中国 china |
美国 USA |
瑞典 Sweden |
德国 Germany |
法国 France |
日本 Japan |
| Low alloy type | 00Cr23Ni4N | UNS S32304 | SS2327（SAF2304) | W.Nr.1.4362 | UR35N | DP11 |
| Medium alloy type |
00Cr18Ni5MoSi2
00Cr22Ni5Mo3N |
UNSS31500 UNS
S31803/S32205 |
SS2376(3Re60)
SS2377(SAF2205) |
W.Nr.1.4460
W.Nr.1.4501 |
UR45N | DP1 |
| High gold type |
0Cr25Ni5Mo2
00Cr25Ni7Mo3WCuN |
UNS S32900 UNSS31260 |
SS2324(10RE51) | W.Nr.1.4460 W.Nr.1.4501 |
329J1 329J21 |
|
| Super Duplex Steel |
00Cr25Ni7Mo4N
0Cr25Ni6Mo3CuN |
UNS S32750 UNS S32550 |
SS2328(SAF2507) |
W.Nr.1.4410 W.Nr.1.4507 |
UR47N- UR52N- |
Relevant Standards for Duplex Stainless Steel Products of Our Company
|
材质 matenals |
Material seamless and welded pipe |
Bar |
| Duplex Stainless Steel Pipe |
ASTM A789 ASTM A790 ASTM A450 ASTM A530 |
ASTM A276 ASTM A479 ASTM A484 |
Property and Chemical Composition (%) of Commonly Used Duplex Stainless Steel
|
钢号 Grade of steel |
C≤ | Mn≤ | Si≤ | S≤ | PC≤ | Cr | Ni | Mo | Cu≤ | N |
|
S32750(SAF2507) 00Cr25Ni7Mo4N |
0.03 | 1.20 | 0.80 | 0.020 | 0.035 | 24.0/ 26.0 |
6.0/ 8.0 |
0.50 | 0.24/ 0.32 |
|
|
S31803/S32205 (SAF2205) 00Cr22Ni5Mo3N |
0.03 | 2.00 | 1.0 | 0.02 | 0.03 |
21.0 23.0 |
4.50/ 6.50 |
2.50/ 3.50 |
0.08/ 0.20 |
|
|
S31500(3RE60) 00Cr18Ni5Mo3Si2 |
0.03 | 1.2/ 2.00 |
1.4 2.00 |
0.030 | 0.030 | 18.0 19.0 |
4.25/ 5.25 |
2.50/ 3.00 |
0.05/ 0.10 |
Mechanical properties
|
钢号 Grade of steel |
Heat treatment system ℃ |
α b(Mpa) ≥ |
α s(Mpa) ≥ |
6% ≥ |
硬度≥ Hardness |
|
| 布氏 Brinell |
洛氏 Rockwell |
|||||
| S32750(SAF2507) 00Cr25Ni7Mo4N |
1025-1125 Water quenching |
800 | 550 | 15 | 310 | 32 |
|
S31803/S32205 (SAF2205) 00Cr22Ni5Mo4N |
1020-110 Water quenching |
620 | 25 | 290 | 30.5 | |
|
S31500(3RE60) 00Cr18Ni5Mo3Si2 |
1025-1125 Water quenching |
800 | 550 | 15 | 310 | 32 |
Metallographic structure
The company's internal control standards stipulate the ratio.
The company's internal control standards stipulate the ratio.
The content of austenite phase is 40%-60%.
The precipitation of alpha-equivalent catalytic phase is not allowed in metallographic structure.
Continuous service temperature range of duplex stainless steel is - 50 ~280 ℃
Hot working temperature should not be less than 950 ℃