SUZHOU FRANK STEEL CO.,LTD.
| Payment Terms | T/T, L/C |
| Supply Ability | 1000 Ton per 30 days |
| Delivery Time | about 30 work days |
| Packaging Details | Simple packing in hexagon shape per bunch or plywooden boxes |
| Application | Heavy Industrial Machinery Pipe |
| Standard | DIN2391 ST30Si |
| Thickness | 0.8-12mm |
| Technique | Cold Rolled / Cold Drawn |
| Length | As customer's require |
| Type | Seamless,round |
| Outer diameter | 6-168mm |
| Features | No deformation in Cold bending |
| Brand Name | FRANK STEEL |
| Model Number | DIN2391 ST30Si |
| Certification | DNV / LR / BV/ SGS |
| Place of Origin | P.R.CHINA |
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Product Specification
| Payment Terms | T/T, L/C | Supply Ability | 1000 Ton per 30 days |
| Delivery Time | about 30 work days | Packaging Details | Simple packing in hexagon shape per bunch or plywooden boxes |
| Application | Heavy Industrial Machinery Pipe | Standard | DIN2391 ST30Si |
| Thickness | 0.8-12mm | Technique | Cold Rolled / Cold Drawn |
| Length | As customer's require | Type | Seamless,round |
| Outer diameter | 6-168mm | Features | No deformation in Cold bending |
| Brand Name | FRANK STEEL | Model Number | DIN2391 ST30Si |
| Certification | DNV / LR / BV/ SGS | Place of Origin | P.R.CHINA |
| High Light | 2391 Precision Steel Tube ，ST30Si precision steel pipe | ||
DIN2391 ST30Si Best Bright Finish Precision Seamless Steel Pipe, No Deformation In Cold Bending
1. Description
DIN2391 ST30 Si precision seamless steel pipe is a cold-rolled high-precision seamless steel pipe. Its wall thickness and outer diameter are very well controlled, and its surface cleanliness is high. The carbon content of this steel pipe is low, and its hardness, tensile strength and yield strength are slightly lower than those of other steel grades. The advantage is that it is easier to rework and its process performance is excellent, such as U-bend. Steel pipe can bear high pressure and impact, especially suitable for hydraulic machinery and auto parts industry. The features of this steel pipe: no deformation in cold bending, no crack in expanding, flattening, suitable for various industries requiring bending deformation processing.
Size: 6mm-168mm.
W.T.: 0.8mm-12mm.
Shape: Round.
Production type: Cold drawn or cold rolled.
Length: Single random length/ Double random length or as customer’s actual request max length is 10m.
Grade: St30 Si, St30 Al, St35, St45, St52.
2. Surface Quality
There are generally three delivery states.
A. NBK state (no oxidation bright heat treatment) Features--- high precision, good finish, no oxide layer.
B. Black phosphating state Features--- bright in black, good color, strong rust resistance.
C. Galvanizing State Features--- meet special requirements
3. Chemical Composition
| Steel name | C max | Si max | Mn | P max | S max |
| St 30 Si | 0.1 | 0.3 | ≤0.55 | 0.025 | 0.025 |
| St 30 Al | 0.1 | 0.05 | ≤0.55 | 0.025 | 0.025 |
| St 35 | 0.17 | 0.35 | ≥0.40 | 0.025 | 0.025 |
| St 45 | 0.21 | 0.35 | ≥0.40 | 0.025 | 0.025 |
| St 52 | 0.22 | 0.55 | ≤1.60 | 0.025 | 0.025 |
4. Mechanical Properties
| Steel Grade | Minimum values for the delivery condition | ||||||||||||
| Steel Name | Steel Number | BK | BKW | BKS | GBK | NBK | |||||||
| Rm | A % | Rm | A % | Rm | ReH | A % | Rm | A % | Rm | ReH | A % | ||
| Mpa | Mpa | Mpa | Mpa | Mpa | Mpa | Mpa | |||||||
| St 30 Si | 1.0211 | 430 | 8 | 380 | 12 | 380 | 280 | 16 | 280 | 30 | 290 to 420 | 215 | 30 |
| St 30 Al | 1.0212 | 430 | 8 | 380 | 12 | 380 | 280 | 16 | 280 | 30 | 290 to 420 | 215 | 30 |
| St 35 | 1.0308 | 480 | 6 | 420 | 10 | 420 | 315 | 14 | 315 | 25 | 340 to 470 | 235 | 25 |
| St 45 | 1.0408 | 580 | 5 | 520 | 8 | 520 | 375 | 12 | 390 | 21 | 440 to 570 | 255 | 21 |
| St 52 | 1.058 | 640 | 4 | 580 | 7 | 580 | 420 | 10 | 490 | 22 | 490 to 630 | 355 | 22 |
5. Details picture
About us
We are seamless steel pipe manufacturer. All the pipes are custom made. Please tell us what steel grade (standard) you want, and we will quote you immediately. The outer diameter, wall thickness, length and quantity of the pipe are necessary.
Company Details
Business Type:
Manufacturer,Exporter,Seller
Year Established:
2005
Total Annual:
400000-500000
Employee Number:
280~300
Ecer Certification：
Active Member
Founded in 2005 in Suzhou, China, Frank steel specializes in seamless steel tube production and international trade, With the rapid development of Internet business, Frank steel, together with many famous seamless steel tube manufacturers, has jointly built an Internet business platform... Founded in 2005 in Suzhou, China, Frank steel specializes in seamless steel tube production and international trade, With the rapid development of Internet business, Frank steel, together with many famous seamless steel tube manufacturers, has jointly built an Internet business platform...
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