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  0,22  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/ R13/ 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
1 x 1250 x 2500 mm 25
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
MEASUREMENTS KG/PLATE
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
15 x 2000 x 6000 mm 1484
20 x 1500 x 3000 mm 742
20 x 1500 x 6000 mm 1484
20 x 2000 x 6000 mm 1978
25 x 1500 x 3000 mm 927
25 x 1500 x 6000 mm 1854
25 x 2000 x 6000 mm 2472
30 x 1500 x 3000 mm 1113
30 x 1500 x 6000 mm 2225
30 x 2000 x 6000 mm 2967
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

COIL STOCK

1300 MM 1500 MM 2000 MM
0,5 MM 1,5  MM 3 MM
0,6 MM 2 MM 4 MM
0,7 MM 3 MM 5 MM
0,8 MM 4 MM 6 MM
1 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 54,70