EN 1.4547 / UNS S31254 / 6MO / F44
MATERIAL DESCRIPTION
All our 6Mo materials are produced by Norsok M-650 Ed.4 and/ or ISO 17782 qualified manufacturers.
The 6Mo super austenitic steel combines moderate tensile strength and high ductility with excellent corrosion resistance in seawater and variety of industrial environment. Typically the alloy has PREN of 42 – 44, which ensure that the resistance to pitting corrosion is high and it also has a hight resistance to crevice corrosion.
Trademark information: 254 SMO is a trademark owned by Outokumpu OY.
Applications
Typical applications for the 6Mo alloy:
- Pumps, valves, chokes, pipework/flanges and manifolds in oil and gas industry.
- High resistance to general corrosion.
Heat Treatment
Solution annealing at min 1150°C followed by water quenching.
Weldability
Very good.
Chemical composition – Specific for bars
Weight % | C | Mn | P | S | Si | Cr | Ni | Mo | N | Cu | PREN |
Min. | 19,50 | 17,50 | 6,00 | 0,18 | 0,50 | 40 | |||||
Max. | 0,020 | 1,00 | 0,030 | 0,010 | 0,70 | 20,50 | 18,50 | 6,50 | 0,22 | 1,00 |
PREN= %Cr + 3.3%Mo + 16%N ≥ 40
Reference standards
General:
- Norsok M-650 Ed.4 qualified manufacturers
- PED 2014/68/EU Annex I section 4.3
- AD2000 W0 (W2/ W10)
- NACE MR0175/ ISO 15156-3 and NACE MR0103/ ISO 17945
Plate, sheet and coil:
-
ASTM A240, EN 10028-7, EN 10088-2, EN 10088-4, Norsok M-630 MDS R15
Bar and forging:
-
ASTM A276, ASTM A479, ASTM A182, EN 10088-3, Norsok M-630 MDS R14/ R17
Other products:
-
As per applicable ASTM and/ or EN standards and Norsok M-630 MDS
Mechanical Properties (Typical)
Yield strength Rp0.2, MPa |
Yield strength Rp1.0, MPa |
Tensile strength Rm, MPa |
Elongation [%] |
Hardness [HB] |
|
PLATE CR (COIL) | ≥ 320 | ≥ 350 | 690-850 | ≥ 35 | ≤ 223 |
PLATE HR (COIL) | ≥ 310 | ≥ 340 | 655-850 | ≥ 35 | ≤ 223 |
PLATE (QUARTO) | ≥ 310 | ≥ 340 | 655-850 | ≥ 40 | ≤ 223 |
BAR | ≥ 300 | ≥ 650 | ≥ 35 | ≤ 321 |
ROUND BAR STOCK
DIA | KG/M |
10 mm | 0.7 |
12 mm | 1. |
16 mm | 1.7 |
20 mm | 2.6 |
25 mm | 4. |
30 mm | 5.8 |
32 mm | 6.6 |
35 mm | 7.9 |
40 mm | 10.3 |
50 mm | 16. |
60 mm | 23. |
65 mm | 27. |
70 mm | 31.2 |
75 mm | 36.1 |
80 mm | 41.2 |
90 mm | 51.9 |
100 mm | 64.1 |
110 mm | 76.1 |
115 mm | 85.9 |
DIA | KG/M |
120 mm | 92.3 |
130 mm | 108.1 |
140 mm | 125.4 |
150 mm | 144 |
160 mm | 161 |
170 mm | 186 |
180 mm | 208 |
200 mm | 256 |
210 mm | 286 |
220 mm | 308 |
230 mm | 343 |
250 mm | 393 |
270 mm | 467 |
280 mm | 503 |
300 mm | 577 |
325 mm | 687 |
350 mm | 796 |
380 mm | 939 |
400 mm | 1028 |
PLATE STOCK
MEASUREMENTS | KG/PLATE |
0,5 x 1500 x 3000 mm | 18 |
1 x 1500 x 3000 mm | 36 |
1,5 x 1500 x 3000 mm | 54 |
2 x 1500 x 3000 mm | 72 |
3 x 1500 x 3000 mm | 108 |
3 x 1500 x 6000 mm | 216 |
3 x 2000 x 6000 mm | 288 |
4 x 1500 x 3000 mm | 144 |
4 x 1500 x 6000 mm | 288 |
4 x 2000 x 6000 mm | 384 |
5 x 1500 x 3000 mm | 180 |
5 x 1500 x 6000 mm | 360 |
5 x 2000 x 6000 mm | 480 |
6 x 1500 x 3000 mm | 216 |
6 x 1500 x 6000 mm | 432 |
6 x 2000 x 6000 mm | 576 |
8 x 1500 x 3000 mm | 297 |
8 x 1500 x 6000 mm | 594 |
8 x 2000 x 6000 mm | 791 |
10 x 1500 x 3000 mm | 371 |
10 x 1500 x 6000 mm | 742 |
10 x 2000 x 6000 mm | 989 |
12 x 1500 x 3000 mm | 445 |
12 x 1500 x 6000 mm | 890 |
12 x 2000 x 6000 mm | 1187 |
15 x 1500 x 3000 mm | 557 |
15 x 1500 x 6000 mm | 1113 |
MEASUREMENTS | KG/PLATE |
15 x 2000 x 6000 mm | 1484 |
16 x 2000 x 6000 mm | 1536 |
18 x 2000 x 6000 mm | 1728 |
20 x 1500 x 3000 mm | 742 |
20 x 1500 x 6000 mm | 1484 |
20 x 2000 x 6000 mm | 1978 |
22 x 2000 x 6000 mm | 2112 |
24 x 2000 x 6000 mm | 2304 |
25 x 1500 x 3000 mm | 927 |
25 x 1500 x 6000 mm | 1854 |
25 x 2000 x 6000 mm | 2472 |
26 x 2000 x 6000 mm | 2496 |
28 x 2000 x 6000 mm | 2688 |
30 x 1500 x 3000 mm | 1113 |
30 x 1500 x 6000 mm | 2225 |
30 x 2000 x 6000 mm | 2967 |
32 x 2000 x 6000 mm | 3072 |
35x 2000 x 6000 mm | 3360 |
36 x 2000 x 6000 mm | 3456 |
40 x 1500 x 3000 mm | 1484 |
40 x 1500 x 6000 mm | 2967 |
40 x 2000 x 6000 mm | 3956 |
50 x 1500 x 3000 mm | 1854 |
50 x 1500 x 6000 mm | 3708 |
50 x 2000 x 6000 mm | 4944 |
60 x 1500 x 3000 mm | 2160 |
COIL STOCK
1300 MM | 1500 MM | 2000 MM |
0,5 MM | 0,6 MM | 3 MM |
0,7 MM | 4 MM | |
0,8 MM | 5 MM | |
1 MM | 6 MM | |
1,5 MM | ||
2 MM | ||
3 MM | ||
4 MM | ||
5 MM | ||
6 MM |
PIPE STOCK
DIMENSIONS | SCH | KG/M |
---|---|---|
21,3 X 2,77 | 1/2″ sch 40s | 1,30 |
26,7 X 2,87 | 3/4″ sch 40s | 1,70 |
33,4 x 2,77 | 1″ sch 10s | 2,10 |
33,4 x 3,38 | 1” sch 40s | 2,50 |
42,2 x 2,77 | 1 1/4” sch10s | 2,70 |
48,3 x 2,77 | 1 1/2” sch 10s | 3,20 |
48,3 x 3,68 | 1 1/2” sch 40s | 4,10 |
60,3 x 2,77 | 2” sch 10s | 4,00 |
60,3 x 3,91 | 2” sch 40s | 5,50 |
73 x 3,05 | 2 1/2” sch 10s | 5,30 |
88,9 x 3,05 | 3” sch 10s | 6,50 |
88,9 x 5,49 | 3” sch 40s | 11,30 |
114,3 x 3,05 | 4” sch 10s | 8,40 |
114,3 x 6,02 | 4” sch 40s | 16,10 |
168,3 x 3,40 | 6” sch 10s | 13,80 |
168,3 x 7,11 | 6” sch 40s | 28,30 |
219,1 x 3,76 | 8” sch 10s | 20,00 |
273 x 4,19 | 10” sch 10s | 27,80 |
323,8 x 4,57 | 12” sch 10s | 36,00 |
355,6 x 6,35 | 14” sch 20 | 69,20 |
ASTM A312/ A999 for welded pipes.
Equivalent Standards
- EN 1.4547
- UNS S31254
- Grade F44
- 254 SMo
- 6Mo