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ASTM A240 254 SMO Sheets

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Contents-

1. ASTM A240 254 SMO Sheets Specification

2. ASTM A240 254 SMO Sheets quality certificates

3. ASTM A240 254 SMO Sheets Packaging & Shipping

4. ASTM A240 254 SMO Sheets Useful info

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ASTM A240 254 SMO Sheets Specification

Standards:

  • ASTM/ASME: UNS S31254
  • EURONORM: FeMi35Cr20Cu4Mo2
  • DIN: 2.4660

Product Name: ASTM A240 254 SMO Sheets

254 SMO

UNS S31254 F44/ 1.4547 / 2378

STAINLESS SHEET

254 SMO

Cold Rolled, Annealed

Conforms to: ASTM A240, ASME SA240,

ASME SA240, SA480

Ga. Dec.

Thickness

Size

in

Inches

Weight

per

Sq. Ft.

Weight

per

Sheet

10
.135
48 x 120
5.670
226.80
48 x 144
272.16
11
.120
48 x 120
5.040
201.60
48 x 144
241.92
12
.105
48 x 120
4.427
177.08
48 x 144
212.49
14
.075
48 x 120
3.154
126.16
48 x 144
151.32
16
.060
48 x 120
2.499
99.96
48 x 144
119.95
18
.050
48 x 120
2.020
80.80
48 x 144
96.96
20
.037
48 x 120
1.490
59.60
48 x 144
71.52
24
.024
48 x 120
0.987
39.48
Ga. Dec.

Thickness

Size

in

Inches

Weight

per

Sq. Ft.

Weight

per

Sheet

48 x 144
47.38

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

ASTM A240 254 SMO Sheets quality certificates

ASTM A240 254 SMO Sheets delivered with a 3.1 certificate. we can perform the tests required to issue a 3.2 certificate, or a CMTR in accordance with the ASME III Code.

ASTM A240 254 SMO Sheets Packaging & Shipping

Beyond products as such, we offer some additional services quite worth having.

So, besides the fact that we can arrange freight transportation for you, we can before that:

  • specifically mark parts or packages;
  • provide for a special packing according to what is required by the shipping method or by you.

We mark the ASTM A240 254 SMO Sheets as needed with the most suitable marking technique.

When packaging and packing, our experienced warehouse staff systematically takes the greatest precautions for your ASTM A240 254 SMO Sheets to be optimally protected during transportation. We pack the ASTM A240 254 SMO Sheets according to the appropriate method: strapped pallet, wooden crate, overseas packing (ISPM15).

ASTM A240 254 SMO Sheets Useful info

Alloys 254 / 254 SMO / 6 Mo is an austenitic stainless steel with a high molybdenum content. Coupled with Nickel and Copper this gives the alloy a good resistance to pitting and crevice corrosion, especially in environments containing halide ions, e.g. chloride, bromide and fluoride solutions.

254 SMO (UNS S31254) may offer a cost effective solution to Nickel and Titanium alloys in these environments.

254 SMO is a high-alloy austenitic stainless steel developed for use in seawater and other aggressive chloride-bearing media. The steel is characterized by the following properties:

  • Excellent resistance to pitting and crevice corrosion
  • High resistance to general corrosion
  • High resistance to stress corrosion cracking
  • Higher strength than conventional austenitic stainless steels
  • Good weldability

Standards

  • UNS S31254
  • EN number 1.4547
  • EN name X1CrNiMoCuN20-18-7
  • W.Nr. 1.4529**
  • SS 2378*
  • AFNOR Z1 CNDU 20.18.06AZ*

* Obsolete. Replaced by EN.

** Nearest equivalent grade.

Product standards

  • Seamless tube and pipe: ASTM A269, A213, A312, NFA 49-217, EN 10216-5
  • Welded tube and pipe: ASTM A249, A269 , A312, A358, A409
  • Fittings: ASTM A182
  • Bar: ASTM A276, A479, EN 10088-3
  • Forged products: ASTM A473

Chemical composition (nominal) %

C Si Mn P S Cr Ni Mo N Cu
≤0.020 ≤0.80 ≤1.00 ≤0.030 ≤0.010 20 18 6.1 0.20 0.7

Chemical Properties

% C Cr Mn Mo N Ni P Si S
254 SMO 0.02 max min: 19.5

max:20.0

1.00 max min: 6.0

max: 6.5

min: 0.18

max: 0.20

min: 17.5

max: 18.0

0.03 max 0.80 max 1.01 max

Mechanical properties

The following figures apply to solution annealed condition seamless tube and pipe.

Wall thickness Proof strength Tensile strength Elong. Hardness
Rp0.2a) Rp1.0a) Rm Ab) A2″ HRB
mm MPa MPa MPa % %
Metric units, at 20°C
<5 ≥310 ≥340 675-850 ≥35 ≥35 ≤96
>5 ≥310 ≥340 655-850 ≥35 ≥35 ≤96

1 MPa = 1 N/mm2

Fabrication

Avoid abrasion against copper/copper alloys or other similar metals which, if present in metallic form, can cause cracks during subsequent welding, hot processing or heat treatment.

Bending

The excellent formability of 254 SMO permits cold bending to very tight bending radii. Annealing is not normally necessary after cold bending.

Corrosion Resistance

  • Excellent resistance to pitting and crevice corrosion due to its high chromium, molybdenum, and nitrogen content
  • Has a very low carbon content, which means there is very little risk of carbide precipitation during heating
  • Possesses very good resistance in water containing chlorides, therefore, it is suitable for use in seawater as it can be exposed to it for prolonged periods without suffering from crevice corrosion

Machinability

  • High work hardening rate combined with a lack of sulfur makes it very difficult to machine
  • Slow speeds, sharp tools, positive feeds, over-powered machine tools, and ample lubrication offer the best results