Hebei shengtian pipe-fitting group Co., ltd.We are the professional exporter and supplier of ASTM A312 S31254 Seamless Stainless Steel Pipe,SA 312 S31254 pipe,ASTM A312 254SMO Seamless Stainless Steel Pipe.
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**
AFNOR: Z1 CNDU 20.18.06AZ*
Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
ASTM A312 S31254 Pipe specification.
Grade: UNS S31254,254SMO,
Standard:Astm A312
Size: OD: 10.3-762mm WT: 1-50mm
Length: fixed length or random
Delivery condition: annealing/pickling/ passivization
Packaging: bundle, plywood case.
seamless, straight-seam welded, and heavily cold worked welded austenitic stainless steel pipe intended for high-temperature and general corrosive service.
| ASTM A312 S31254 Stainless Steel Seamless Pipes |
| Sr. No. |
Material |
Size |
Sch. |
Specification |
| 1 |
Seamless Pipe |
15 NB
To
300 NB |
Sch. 5s
Sch. 10s
Sch. 40s
Sch. 80s
Sch. 160s
Sch. XXS |
ASTM A 312 |
| 2 |
Welded (ERW) Pipe |
15 NB
To
300 NB |
Sch. 5s
Sch. 10
Sch. 40s &
Sch. 80s |
ASTM A 312 |
| 3 |
Welded (ERW) Pipe |
150 NB
To
600 NB |
Sch. 5s
Sch. 10s
Sch. 40s &
Sch. 80s |
ASTM A 358 |
ASTM A312 UNS S31254 ( 6% Moly) , 254MO,Cold Drawing And Cold Rolling, Stainless Stel Seamless Pipe
Chemical Composition % of ASTM A312 UNS S31254 Pipe
| C |
Cr |
Cu |
Mn |
Mo |
N |
Ni |
P |
Si |
S |
| Max |
|
|
Max |
|
|
|
Max |
Max |
Max |
| 0.02 |
19.5-20.5 |
0.5-1.0 |
1.0 |
6.0-6.5 |
0.18-0.22 |
17.5-18.5 |
0.03 |
0.80 |
1.01 |
Mechanical Properties of ASTM A312 SMO 254 Stainless Steel Seamless Pipes
The following table shows Mechanical Properties of stainless steel grade 254 SMO™.
| Properties |
Metric |
Imperial |
| Tensile strength |
680 MPa |
98600 psi |
| Yield strength |
300 MPa |
43500 psi |
| Modulus of elasticity |
195 GPa |
28300 ksi |
| Shear modulus |
75 GPa |
10900 ksi |
| Poisson’s ratio |
0.30 |
0.30 |
| Elongation at break |
50 % |
50 % |
| Hardness, Brinell |
210 |
210 |
Tests and Inspection Of ASTM A312 S31254 Stainless Steel Pipe
Flattening Test,Flaring Test,Hardness Test,Hydrostatic or Nondestruction Electric Test ( Eddy Current and Ultrasonic Testing)
1.PMI,Spectro Chemical Aanlysis Test before shipment.
2.100% Dimension & Visual Examination
3. Mechanical Properties Test Include Tension Test,Flaring Test (For Seamless tube/pipe)/ Flange Test (For Welded Pipe & Tube), Hardness Test ,Reversed Flattening Test, Transverse-guided face bend test
4.100% Hydrostatic Test or 100% NON-DESTRUCTIVE Test (ET or UT)
5.Radiographic Test for Welded Pipe (shall be accordance with specification,or shall be as agreed upon between the purchaser and vendor)
6.Straightness Test (optional)
7.Roughness Test (optional)
8.Intergranular Corrosion Test(optional)
9.Impact Test (optional)
10.Grain Size Determinations (optional)
ASTM A312 S31254 Stainless Steel Seamless Pipe , offshore and platform application 254 SMO is a high-alloy austenitic stainless steel developed for use in seawater and other aggressive chloride-bearing media.
