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Austenitic SS 317 is another molybdenum bearing grade and is a modification of grade 316 with increased chromium content, hence better corrosion resistance. Grade 317L is a more widely used alloy in comparison with its predecessor. It has better corrosion resistance than grade 316L and lesser carbon content than grade 317.
The adequate chromium and carbon content in the grade 317L gives it better resistance properties against various media and suitable welding properties without sensitization to intergranular corrosion.
Post annealing, the grade becomes non-magnetic due to its microstructure. However, after welding with similar metals, it might become slightly magnetic.
Size Range:
Production | Outside Diameter | Wall Thickness |
Seamless Pipe | 6.00mm to 630mm | 1mm to 48mm |
Chemical Composition:
| Grade | C | Mn | P | S | Si | Cr | Ni | Mo | Fe | |
| 317 | Min. | - | - | 0 | - | - | 18 | 11 | 3 | 57.845 |
| Max. | 0.08 | 2 | 0.045 | 0.03 | 1 | 20 | 15 | 4 | - | |
| 317L | Min. | - | - | - | - | - | 18 | 11 | 3 | 57.89 |
| Max. | 0.035 | 2 | 0.045 | 0.03 | 1 | 20 | 15 | 4 |
Mechanical Properties:
Grade | Tensile Strength(MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness |
Rockwell B (HR B) max | ||||
317 | 515 | 205 | 35 | 90 |
317L | 515 | 205 | 35 | 90 |
American standard dimension coparison table
| Norminal Pipe Size | Outside Diameter | Wall Thicknesses Schedule ANSI/ASME B36.10M,B36.19M | ||||||||||||||||
| DN(in.) | D | sch5s | sch10s | sch10 | sch20 | sch30 | sch40s | STD | sch40 | sch60 | sch80s | XS | sch80 | sch100 | sch120 | sch140 | sch160 | XXS |
| 1/8 | 10.3 | --- | 1.24 | --- | --- | --- | 1.73 | 1.73 | 1.73 | --- | 2.41 | 2.41 | 2.41 | --- | --- | --- | --- | --- |
| 1/4 | 13.7 | --- | 1.65 | --- | --- | --- | 2.24 | 2.24 | 2.24 | --- | 3.02 | 3.02 | 3.02 | --- | --- | --- | --- | --- |
| 3/8 | 17.1 | --- | 1.65 | --- | --- | --- | 2.31 | 2.31 | 2.31 | --- | 3.2 | 3.2 | 3.2 | --- | --- | --- | --- | --- |
| 1/2 | 21.3 | 1.65 | 2.11 | --- | --- | --- | 2.77 | 2.77 | 2.77 | --- | 3.73 | 3.73 | 3.73 | --- | --- | --- | 4.78 | 7.47 |
| 3/4 | 26.7 | 1.65 | 2.11 | --- | --- | --- | 2.87 | 2.87 | 2.87 | --- | 3.91 | 3.91 | 3.91 | --- | --- | --- | 5.56 | 7.82 |
| 1 | 33.4 | 1.65 | 2.77 | --- | --- | --- | 3.38 | 3.38 | 3.38 | --- | 4.55 | 4.55 | 4.55 | --- | --- | --- | 6.35 | 9.09 |
| 1¼ | 42.2 | 1.65 | 2.77 | --- | --- | --- | 3.56 | 3.56 | 3.56 | --- | 4.85 | 4.85 | 4.85 | --- | --- | --- | 6.35 | 9.7 |
| 1½ | 48.3 | 1.65 | 2.77 | --- | --- | --- | 3.68 | 3.68 | 3.68 | --- | 5.08 | 5.08 | 5.08 | --- | --- | --- | 7.14 | 10.15 |
| 2 | 60.3 | 1.65 | 2.77 | --- | --- | --- | 3.91 | 3.91 | 3.91 | --- | 5.54 | 5.54 | 5.54 | --- | --- | --- | 8.74 | 11.07 |
| 2½ | 73 | 2.11 | 3.05 | --- | --- | --- | 5.16 | 5.16 | 5.16 | --- | 7.01 | 7.01 | 7.01 | --- | --- | --- | 9.53 | 14.02 |
| 3 | 88.9 | 2.11 | 3.05 | --- | --- | --- | 5.49 | 5.49 | 5.49 | --- | 7.62 | 7.62 | 7.62 | --- | --- | --- | 11.13 | 15.24 |
| 3½ | 101.6 | 2.11 | 3.05 | --- | --- | --- | 5.74 | 5.74 | 5.74 | --- | 8.08 | 8.08 | 8.08 | --- | --- | --- | --- | --- |
| 4 | 114.3 | 2.11 | 3.05 | --- | --- | --- | 6.02 | 6.02 | 6.02 | --- | 8.56 | 8.56 | 8.56 | --- | 11.13 | --- | 13.49 | 17.12 |
| 5 | 141.3 | 2.77 | 3.4 | --- | --- | --- | 6.55 | 6.55 | 6.55 | --- | 9.53 | 9.53 | 9.53 | --- | 12.7 | --- | 15.88 | 19.05 |
| 6 | 168.3 | 2.77 | 3.4 | --- | --- | --- | 7.11 | 7.11 | 7.11 | --- | 10.97 | 10.97 | 10.97 | --- | 14.27 | --- | 18.26 | 21.95 |
| 8 | 219.1 | 2.77 | 3.76 | --- | 7.04 | 8.18 | 8.18 | 8.18 | 10.31 | 12.7 | 12.7 | 12.7 | 15.09 | 18.26 | 20.62 | 23.01 | 22.23 | |
| 10 | 273.1 | 3.4 | 4.19 | --- | 6.35 | 7.8 | 9.27 | 9.27 | 9.27 | 12.7 | 12.7 | 12.7 | 15.09 | 18.26 | 25.4 | 28.58 | 25.4 | |
| 12 | 323.9 | 3.96 | 4.57 | --- | 6.35 | 8.38 | 9.53 | 9.53 | 10.31 | 14.27 | 12.7 | 12.7 | 17.48 | 21.44 | 25.4 | 28.58 | 33.32 | 25.4 |
| 14 | 355.6 | 3.96 | 4.78 | 6.35 | 7.92 | 9.53 | --- | 9.53 | 11.13 | 15.09 | --- | 12.7 | 19.05 | 23.83 | 27.79 | 31.75 | 35.71 | |
| 16 | 406.4 | 4.19 | 4.78 | 6.35 | 7.92 | 9.53 | --- | 9.53 | 12.7 | 16.66 | --- | 12.7 | 21.44 | 26.19 | 30.96 | 36.53 | 40.49 | |
| 18 | 457.2 | 4.19 | 4.78 | 6.35 | 7.92 | 11.13 | --- | 9.53 | 14.27 | 19.05 | --- | 12.7 | 23.83 | 29.36 | 34.93 | 39.67 | 45.24 | |
| 20 | 508 | 4.78 | 5.54 | 6.35 | 9.53 | 12.7 | --- | 9.53 | 15.09 | 20.62 | --- | 12.7 | 26.19 | 32.54 | 38.1 | 44.45 | 50.01 | |
| 22 | 558.8 | 4.78 | 5.54 | 6.35 | 9.53 | 12.7 | --- | 9.53 | --- | 22.23 | --- | 12.7 | 28.58 | 34.93 | 41.28 | 47.63 | 53.98 | |
| 24 | 609.6 | 5.54 | 6.35 | 6.35 | 9.53 | 14.27 | --- | 9.53 | 17.48 | 24.61 | --- | 12.7 | 30.96 | 38.89 | 46.02 | 52.37 | 59.54 | |
| 26 | 660.4 | --- | --- | 7.92 | 12.7 | --- | --- | 9.53 | --- | --- | --- | 12.7 | ||||||
| 28 | 711.2 | --- | --- | 7.92 | 12.7 | 15.88 | --- | 9.53 | --- | --- | --- | 12.7 | ||||||
| 30 | 762 | 6.35 | 7.92 | 7.92 | 12.7 | 15.88 | --- | 9.53 | --- | --- | --- | 12.7 | ||||||
| 32 | 812.8 | --- | --- | 7.92 | 12.7 | 15.88 | 17.48 | 9.53 | 17.48 | --- | --- | 12.7 | ||||||
| 34 | 863.6 | --- | --- | 7.92 | 12.7 | 15.88 | 17.48 | 9.53 | 17.48 | --- | --- | 12.7 | ||||||
| 36 | 914.4 | --- | --- | 7.92 | 12.7 | 15.88 | 19.05 | 9.53 | 19.05 | --- | --- | 12.7 | ||||||
| 38 | 965.2 | --- | --- | --- | --- | --- | --- | 9.53 | --- | --- | --- | 12.7 | Note: sch5s,10s,40s,80s Used for steel pipe fittings | |||||
| 40 | 1016 | --- | --- | --- | --- | --- | --- | 9.53 | --- | --- | --- | 12.7 | ||||||
| 42 | 1066.8 | --- | --- | --- | --- | --- | --- | 9.53 | --- | --- | --- | 12.7 | ||||||
| 44 | 1117.6 | --- | --- | --- | --- | --- | --- | 9.53 | --- | --- | --- | 12.7 | ||||||
| 46 | 1168.4 | --- | --- | --- | --- | --- | --- | 9.53 | --- | --- | --- | 12.7 | ||||||
| 48 | 1219.2 | --- | --- | --- | --- | --- | --- | 9.53 | --- | --- | --- | 12.7 | ||||||
| Summary | Standards |
| Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes | ASTM A213 |
| Standard Specification for Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes | ASTM A249 |
| Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service | ASTM A269 |
| Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes | ASTM A312 |
| Standard Specification for Electric-Fusion-Welded Austenitic Chromium-Nickel Stainless Steel Pipe for High-Temperature Service and General Applications | ASTM A409 |
| Standard Specification For Seamless Stainless Steel Mechanical Tubing | ASTM A511 |
| 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:±0.05mm; High:±0.03mm | / | |
| T:0.3~0.4 | Normal:±0.07mm; High:±0.05mm | |||||
| T:0.5~1.0 | Normal:±0.15mm; High:±0.10mm | |||||
| [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% | |||
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
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.
- 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.
- Food processing equipment, particularly in beer brewing, milk processing & wine making.
- Kitchen benches, sinks, troughs, equipment and appliances
- Architectural panelling, railings & trim
- Chemical containers, including for transport
- Heat Exchangers
- Oil and gas
- 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.
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.
