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254 SMO (UNS S31254)
ASTM A240 254 SMO Sheets
Specifications
| Standards |
Designation |
| ASTM |
A 240 |
| ASME |
SB 240 |
ASTM A240 254 SMO Sheets Inventory Stock at factory rate:-
| Sizes |
Availability |
| 0.4mm |
|
| 0.5mm |
|
| 0.8mm |
|
| 1mm |
|
| 1.2mm |
|
| 1.6mm |
|
| 2mm |
|
| 3mm |
|
| 4mm |
|
| 5mm |
|
| 6mm |
|
| 8mm |
|
| 10mm |
|
| 12mm |
|
| 16mm |
|
| 20mm |
|
| 25mm |
|
Dimensions
Specifications
| Alloy |
Common Name |
Related Specifications |
Tensile Strength |
Proof Stress |
Elongation |
| British |
European |
United States |
| Alloy 254 |
254SMO |
|
1.4547 |
ASTM A479/A473,
/A240 S31254
F44 |
655
[95] |
305
[44.2] |
35 |
| Specifications of Alloy 254 |
- Alloy 254 to MLA-MPS-254-BAR
- ASTM A479 Bar UNS S31254
- ASTM A276 Bar UNS S31254
- ASTM A182 Forgings UNS S31254 F44
- ASTM A240 Plate S31254
|
Chemical Specification of Alloy 254
| Elements |
C |
Cr |
Fe |
Mo |
Mn |
N |
Ni |
Nb |
P |
S |
Si |
V |
| Minimum |
|
19.5 |
REMAINDER |
6.0 |
|
0.18 |
17.5 |
|
|
|
|
|
| Maximum |
0.02 |
20.5 |
|
6.5 |
1.0 |
0.22 |
18.5 |
|
0.03 |
0.01 |
0.8 |
|
Basic Properties of Alloy 254- Mechanical Properties
| 0.2% Proof Stress (N/mm2 )[ksi] minimum |
300 [43.5] |
| Ultimate Tensile Strength (N/mm2) [ksi] minimum |
650[94.2] |
| Elongation (%) minimum |
35 |
| Hardness (HBN) |
270 max |
| Reduction of Area(%) minimum |
50 |
Physical Properties of Alloy 254
| Density (Kg.m-3) |
8000 |
| Magnetic Permeability |
<1.05 |
| Young’s Modulus (N/mm2) |
200 x 103 |
| Specific Heat 20°C (J.Kg-1.°K-1) |
500 |
| Electrical resistance, 20°C (µ.O.m) |
0.85 |
| Thermal conductivity, 20°C (W.m-1.°K-1) |
13.5 |
Machining Advice of Alloy 254 - Hot worked and precipitation hardened
| Operation |
Cutting Speed m/min (ft/min) |
Feed Rate
mm/rev (in/rev) |
Depth of cut mm (in) |
| Milling |
18 (58) |
0.13-0.25 mm/tooth
0.005-0.010 in/tooth |
0.2-3.0 (0.007-0.12) |
| Drilling 6.4mm(1/4") dia |
250rpm |
0.075(0.003) |
|
| Drilling 12.7mm(1/2") dia |
250 rpm |
0.125(0.005) |
|
| Drilling 25.4mm(1") dia |
150 rpm |
0.28(0.011) |
|
| Turning - Roughing |
30 - 45 ( 100 - 150 ) |
0.4-0.5 (0.015-0.020) |
2.5 (0.1) |
| Turning - Finishing |
50 - 60 ( 165 - 200 ) |
0.13-0.20 (0.005-0.008) |
0.5 (0.02) |
| Tooling |
Milling/Turning: Carbide (SANDVIK GC 235, SECO T25M)
Drilling: HSS, point angle 118°, chisel angle 120° |
Alloy Comparisons
| Alloy Comparisons |
S20910 |
S32205 |
N05500 |
S31254 |
FERRALIUM 255-SD50 |
| (0.2% Proof Strength, N/mm2) |
420 |
510 |
690 |
325 |
610 |
Corrosion Rate (mm.y-1)Seawater |
<0.01 |
<0.01 |
<0.18 |
<0.01 |
<0.01 |
Corrosion Rate (mm.y-1)10% sulphuric acid at 80°C |
0.7 |
0.4 |
0.1 |
<0.15 |
<0.15 |
Corrosion Rate (mm.y-1) Boiling 50% nitric acid |
0.18 |
<0.15 |
0.15 |
<0.15 |
<0.15 |
| Wear Properties related to Hardness (HRC) |
RC27 |
RC25 |
RC20 |
RC27 |
RC27 |
Main Export Market
- Eastern Europe
- North America
- Mid East/Africa
- Central/South America
- Asia
- Western Europe
- Australasia
- UAE
Sales Locations
U.A.E,
Oman,
Saudi Arabia,
Qatar,
Bahrain,
Egypt,
Turkey
Singapore,
Thailand,
Malaysia
Indonesia
Poland
Italy
Portugal
Spain
Brazil
Chile
Venezuela
Costa Rica
USA
Canada
Angola
Sri Lanka
Russia
