Yuhong Group Co.,Ltd
| Payment Terms | L/C, T/T |
| Supply Ability | ACCORDING TO CUSTOMER'S REQUEST |
| Delivery Time | 10-75DAYS |
| Packaging Details | Ply- Wooden Case/Plastic Bag / Plastic Cap |
| Material | UNS 31254, 1.4547, 6Mo |
| Application | Saltwater Handling, Chemical Processing |
| Eddy Current Test | HT, UT, ET |
| Specification | ASTM A269, A213, A312, NFA 49-217, EN 10216-5 |
| Brand Name | YUHONG |
| Model Number | ASTM A312 UNS 31254 |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
| Place of Origin | China |
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Product Specification
| Payment Terms | L/C, T/T | Supply Ability | ACCORDING TO CUSTOMER'S REQUEST |
| Delivery Time | 10-75DAYS | Packaging Details | Ply- Wooden Case/Plastic Bag / Plastic Cap |
| Material | UNS 31254, 1.4547, 6Mo | Application | Saltwater Handling, Chemical Processing |
| Eddy Current Test | HT, UT, ET | Specification | ASTM A269, A213, A312, NFA 49-217, EN 10216-5 |
| Brand Name | YUHONG | Model Number | ASTM A312 UNS 31254 |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 | Place of Origin | China |
| High Light | 254Mo Seamless Steel Pipe ，Saltwater Handling Seamless Steel Pipe ，6Mo Stainless Steel Pipe | ||
ASTM A312 UNS31254/ 1.4547/ 6 Mo/ 254Mo Seamless Steel Pipe for Saltwater handling
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:
The PRE is defined as, in weight of content %, PRE = Cr % + 3.3 x Mo % + 16 x N %
| 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 |
254 SMO Applications:
| ASTM TP316 | <150 h | Pitting |
| '904L' | No failure (1000 h) | Crevice corrosion |
| Sandvik 254 SMO | No failure (1000 h) | No attack |
| Grade | Time to failure hours |
|---|---|
| ASTM TP316 | 105 |
| TP904L | 225 |
| 254 SMO | 425 |
254 SMO has a very low carbon content. This means that there is very little risk of carbide precipitation during heating, for example when welding. The steel passes the Strauss test (ASTM A262, practice E) even after sensitizing for one hour at 600–1000°C (1110–1830°F).
However, due to the high alloying content of the steel, inter-metallic phases can precipitate at the grain boundaries in the temperature range 600–1000°C (1110–1830°F). These precipitations do not involve any risk of intergranular corrosion in the environments in which the steel is intended to be used. Thus, welding can be carried out without any risk of intergranular corrosion.
The pitting and crevice corrosion resistance of stainless steel is primarily determined by the content of chromium, molybdenum and nitrogen. Manufacture and fabrication, e.g. welding, are also of vital importance for the actual performance in service. A parameter for comparing the resistance to pitting in chloride environments is the PRE number (Pitting Resistance Equivalent). The PRE is defined as, in weight-%, PRE = %Cr + 3.3 x %Mo + 16 x %N
Heat Treatment
The tubes are delivered in heat treated condition. If additional heat treatment is needed due to further processing the following is recommended.
Solution annealing 1150–1200°C (2100–2190°F), quenching in water. Thin-walled tubes min. 1130°C (2060°F), quenching in air/water.
| Wall thickness | Proof strength | Tensile strength | Elong. | Hardness | ||
|---|---|---|---|---|---|---|
| Rp0.2a) | Rp1.0a) | Rm | Ab) | A2" | HRB | |
| mm | MPa | MPa | MPa | % | % | |
| <5 | ≥310 | ≥340 | 675-850 | ≥35 | ≥35 | ≤96 |
| >5 | ≥310 | ≥340 | 655-850 | ≥35 | ≥35 | ≤96 |
| Wall thickness | Proof strength | Tensile strength | Elong. | Hardness | ||
|---|---|---|---|---|---|---|
| Rp0.2a) | Rp1.0a) | Rm | Ab) | A2" | HRB | |
| inch | ksi | ksi | ksi | % | % | |
| <0.187 | ≥45 | ≥49 | 98-123 | ≥35 | ≥35 | ≤96 |
| >0.187 | ≥45 | ≥49 | 98-123 | ≥35 | ≥35 | ≤96 |
a) Rp0.2 and Rp1.0 correspond to 0.2% offset and 1.0% offset yield strength, respectively.
b) Based on L0 = 5.65 √S0 where L0 is the original gauge length and S0 the original cross-section area.
Weldding:
TIG/GTAW or MIG/GMAW welding
ISO 18274 S Ni 6625/AWS A5.14 ERNiCrMo-3 (e.g. Exaton Ni60)
ISO 18274 S Ni 6059/AWS A5.14 ERNiCrMo-13 (e.g. Exaton Ni59)
MMA/SMAW welding
ISO 14172 E Ni 6625/AWS A5.11 ENiCrMo-3 (e.g. Exaton Ni60)
ISO 14172 E Ni 6059/AWS A5.11 ENiCrMo-13 (e.g. Exaton Ni59)
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller,Other
Year Established:
2007
Total Annual:
50M-70M
Employee Number:
50~850
Ecer Certification：
Verified Supplier
YUHONG HOLDING GROUP is one of the largest Procurement, Engineering & Contracting Group companies in China. Our group branch company and factory have been already approved by : ABS, LR, DNV, GL, BV, CCS, KR, PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9... YUHONG HOLDING GROUP is one of the largest Procurement, Engineering & Contracting Group companies in China. Our group branch company and factory have been already approved by : ABS, LR, DNV, GL, BV, CCS, KR, PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9...
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