EN 1.4547 / UNS S31254 / 6MO / F44
MATERIAL DESCRIPTION
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.
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
Weight % | C | Si | Mn | S | P | Cr | Ni | Mo | N | Cu |
Min. | 19,50 | 17,50 | 6,00 | 0,18 | 0,50 | |||||
Max. | 0,020 | 0,80 | 1,00 | 0,010 | 0,030 | 20,50 | 18,50 | 6,50 | 0,25 | 1,00 |
PREN= (Cr% + 3.3Mo% + 16N%) ≥ 40
Product Standards: EN 10272, EN 10088, ASTM A276, ASTM A240, ASTM A479, ASTM A182–11A
(Chemical composition and mechanical properties only)
Approvals: NACE MR0175, NORSOK M650, NORSOK M630 – MDS R11/ R14/ R15/ R17/ R18
Mechanical Properties
Yield strength Rp0.2, MPa |
Tensile strength Rm, MPa |
Elongation [%] |
Hardness [HB] |
Impact, Charpy-V, -46ºC [J] |
Pre | |
All products | ≥ 310 | 655 – 850 | ≥ 35 | ≤ 310 | ≥ 45 | ≥ 40 |
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)