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.

View stock list

Material Weight Calculator

Hardness conversion

PREN Calculator

ksi / MPa converter

Equivalent Standards

  • EN 1.4547
  • UNS S31254
  • Grade F44
  • 254 SMo
  • 6Mo
Tags: Coil / Pipe / Plate / Round Bar & Bored Bar