Product Description
254SMO is a type of austenitic stainless steel that contains high levels of molybdenum, chromium, and nickel. It is also known as UNS S31254 or 1.4547. This material is popular for its exceptional resistance to corrosion caused by various types of chemicals, such as sulfuric acid, hydrochloric acid, and seawater. It has a high level of strength and toughness at both room and elevated temperatures. It is often used in industries such as chemical processing, pulp and paper, and offshore oil and gas due to its excellent durability.
Other key characteristics of ASTM A312 254SMO include:
- Excellent resistance to pitting and crevice corrosion
- High weldability and formability
- Good workability and machinability
- High strength and toughness at both ambient and elevated temperatures
- Low thermal expansion coefficient and good thermal conductivity
Overall, ASTM A312 254SMO is a highly versatile material that is suitable for a wide range of applications in industries such as chemical processing, pulp and paper, offshore oil and gas, and many others that require high levels of corrosion resistance and durability.
Product Parameters
ASTM A213 A312 S31254 254SMO Stainless Steel Tubes Pipes Chemical Composition
| Grade |
C max |
Mn max |
P max |
S max |
Si max |
Cr |
Ni |
Mo |
N |
| S31254 / 254SMO |
0.020 |
1.00 |
0.030 |
0.01 |
0.08 |
19.50-20.50 |
17.50-18.50 |
6.0-6.5 |
0.18-0.22 |
ASTM A213 A312 S31254 254SMO Stainless Steel Tubes Pipes Mechanical Properties
| Grade |
Status |
Tensile Strength |
Yield Strength |
Elongation in 2 in. (min.) % |
| MPa |
ksi |
MPa |
ksi |
| S31254 |
T≤0.187in. (5mm) |
675 |
98 |
310 |
45 |
35 |
| S31254 |
T≤0.187in. (5mm) |
655 |
95 |
310 |
45 |
35 |
ASTM A213 A312 S31254 254SMO Stainless Steel Tubes Pipes Physical Properties
| Density (kg/cm3) |
Melting point |
Specific Heat 0-100°C ( J/kg.K) |
Thermal Conductivity at 20°C Btu/h ft ºF |
Elastic Modulus (GPa) |
Electrical resistivity [μΩ . cm] |
Poissons Ratio |
Shear Modulus |
| 8 g/cm3 0.289 lb/in3 |
1320-1390°C |
500 J.kg-1.°K-1 |
14 W/mK 97.2 BTU in/hr.ft².°F |
195 Gpa 28300 Ksi |
8.5 μohm/cm |
0.3 |
75 Gpa 10900 Ksi |
ASTM A213 A312 S31254 254SMO Stainless Steel Tubes Pipes Equivalent Grade
| Grade |
UNS No |
WERKSTOFF NR. |
EN |
US |
| 254SMO |
S3125 |
1.4547 |
X1CrNiMoN20-18-7 |
ASTM A479/A473, /A240 S31254 F44 |
ASTM A213 A269 A312 A789 GOST9941 EN10216-5 Standard Tolerance
| Standard |
Outside Diameter Tolerance(mm) |
Thickness Tolerance(mm) |
Length Tolerance (mm) |
| ASTM A269 |
D<12.7 |
±0.13 |
±15% |
+3.2 / -0 |
| (12.7~38.1] |
±0.13 |
±10% |
| [38.1~88.9) |
±0.25 |
+4.8 / -0 |
| [88.9~139.7) |
±0.38 |
| [139.7~203.2) |
±0.76 |
| ASTM A213 |
D<25.4 |
±0.1 |
D≤38.1 |
+20%/ -0% |
D≤50.80 |
+3 / -0 |
| [25.4~38.1] |
±0.15 |
| (38.1~50.8) |
±0.2 |
D>38.1 |
+22%/ -0% |
D>50.8 |
+5 / -0 |
| [50.8~63.5) |
±0.25 |
| [63.5~76.2) |
±0.30 |
| [76.2~101.6] |
±0.38 |
| (101.6~190.5] |
+0.38 / -0.64 |
| (190.5~228.6] |
+0.38 / -1.14 |
| ASTM A312 |
[10.29~48.26] |
+0.4 / -0.8 |
10.3~73 |
+20% / -12.5% |
+6 / -0 |
| 88.9~457 T/D≤5% |
+22.5% / -12.5% |
| (48.26~114.30] |
±0.80 |
88.9~457 T/D>5% |
+15% / -12.5% |
| (114.30~219.08] |
+1.6 / -0.8 |
508above T/D<5% |
+22.5% /-12.5% |
| (219.08~457.20] |
+2.4 / -0.8 |
508above T/D>5% |
+15%/-12.5% |
| ASTM A789 |
D<12.7 |
±0.13 |
±15% |
+3 / -0 |
| [12.7 to 38.1) |
±0.13 |
±10% |
| [38.1 to 88.9) |
±0.25 |
+5 / -0 |
| [88.9 to 139.7) |
±0.38 |
| [139.7 to 203.2) |
±0.76 |
| ГОСТ 9941-81 |
[5~10] |
Normal:±0.30
High:±0.20 Higher:±0.15 |
T:0.2 |
Normal:±0.05;
High:±0.03 |
/ |
| T:0.3~0.4 |
Normal:±0.07;
High:±0.05 |
| T:0.5~1.0 |
Normal:±0.15;
High:±0.10 |
| [11~30] |
Normal:±0.40
High:±0.30 Higher:±0.20 |
T:1.2~3.0 |
Normal:+12.5% / -15%;
High:±12.5%;
Higher:+12.5% / -10% |
| T:3.5~7.0 |
Normal:±12.5%;
High:+12.5% / -10%;
Higher:±10% |
| [32~95] |
Normal:±1.2%
High:±1%
Higher:±0.8% |
T:7.5~8.5 |
Normal:+12.5% / -10%;
Higher:±10% |
| EN10216-5 |
D3 |
±0.75% / ±0.30mm |
T3 |
±10%/ ±0.20mm |
L≤6m |
+5 +0 |
| D4 |
±0.5% / ±0.10mm |
T4 |
±7.5% / ±0.15mm |
≥6~12M |
+10-0 |
Packaging & Shipping
- All of our stainless steel seamless pipe & tubes are packaged as per international standard to prevent any possible damage or loss. By default, we will use thick woven plastic bag to bundle the finished pipes together in batches.
- For some special pipes & tubes that are vulnerable to dirt, scratches, stress or rough handling, we will suggest wooden case for protection. Kindly note, wooden case can incur extra cost, not only its own cost, but also the increased freight cost, which is especially true for air transportation.
- For enhanced customer experience, we also provide dedicated package as per your special requirements.
Certifications
The inspection of our company and products is open to customers themselves or their designated third-party inspectors, such as SGS, BV, TUV, DNV, etc., who are well-known in the industry.
PRODUCT APPLICATION
Paper and pulp, Flue gas desulphurisation units in power plants, Desalination plant equipment, Pipework, flanges & manifolds, Seawater handling systems, Oil & Gas industry components, Pumps, Chemical processing, Valves, Control and instrumentation tubes, Process equipment in chemical industry, Components used in petroleum production, Tall oil distillation columns, Saltwater handling, Food processing equipment.
Company Profile
Wenzhou Guohao Steel was established in 2008. We are ISO 9001:2015 approved manufacturer, having a state-of-the-art infrastructure facility for having smooth production process. It has successfully grown by focusing on serving customers across a range of high technology industries. One of our company strengths is its people, with many colleagues having been with the company from the beginning. This provides our customers with the benefit of a wealth of experience and industry knowledge. Guohao Steel now has the whole of manufactured stainless steel products to add to its already large range of High Performance Nickel Alloys.
Guohao Steel adhere to the high standards of integrity and compliance required, including:
- Environmental standards
- Health and safety standards
- Ethical trading standards
- Export compliance requirements
We now stock and have direct access to a wide range of other materials, including stainless steels and nickel alloys. We supply and process pipes for numerous key industry sectors, collaborating with both small businesses and large international manufacturers across various countries. Due to our reputation for quality, reliability, and industry approvals, we are a well-regarded supplier in diverse sectors. Our delivery of long-term tangible benefits enables our customers to compete in today's challenging global marketplace.
In order to achieve our goals, we are improving our facilities and expanding our machinery to offer broader processing capabilities. Additionally, our investment extends to the growth and development of our teams, which represent our most valuable resource. We aim for our customers to receive the best experience and trust in the expertise, knowledge, and experience of our teams. As we continue looking towards the future, we rely on our core values to guide both decisions and actions.
Our Advantages
- More than 16 Years of Experience in Stainless Steel Production.
- Provides cost-effective products and professional services to you.
- We offer an extensive range of stainless steel, super duplex steel,nickel alloy.
FAQ
1.Q: Do you provide customized product services?
A: Of course, we can design and produce the products you need based on your specifications and drawings. For example: special dimensions, special controls, OEM, etc.
2.Q: Are you a manufacturer or trader?
A: We are manufacturers. We have our own factory to produce and process various kinds of stainless steel /nickel alloy pipes.
3.Q: Can we get the some samples?Is there a charge?
A: Yes, we will provide you with the samples you want. The samples are free of charge, but the customer may have to pay the freight.
4.Q: Can we visit your factory?
A: Of course, we welcome you to visit our factory on-site or visit our production line through online videos to learn more about our strength and quality. Once we have your schedule, we will arrange a professional sales team to follow up with you.
5.Q: How do you ensure the quality of the product?
A: All products must undergo three inspections throughout the entire manufacturing process, including production, cutting, and packaging. The factory inspection report is provided with the goods. If necessary, third-party inspections such as SGS can be accepted.
6.Q: What is your delivery time?
A: Different products and procurement quantities have different delivery times. The product will be delivered as soon as possible on the basis of quality assurance. Usually, if the goods are in stock, it takes 3-10 days. Alternatively, if the goods are out of stock, it will take 25 to 45 days.
7.Q: Can you arrange shipment?
A: Of course, we have freight forwarders who have been cooperating for many years. We are VIP and can provide you with the most favorable prices and professional services.
8.Q: What if I don't have import experience?
A: We have rich export experience. As long as you have an import license, please leave the rest to us! We will help you choose the most suitable transportation service to safely and accurately deliver the product to the place where it is needed.
Audited Supplier 
){kind=link}