GB/T 3090 SUS 304/316 ASTM 304/316/321 EN 1.4301/1.4541/1 Austenitic Stainless Small Diameter Seamless Steel Tubes
QUALITY CONTROL
1~ Incoming Raw Material Inspection
2~ Raw Material Segregation to avoid steel grade mix-up
3~ Heating and Hammering End for Cold Drawing
4~ Cold Drawing and Cold Rolling, on line inspection
5~ Heat Treatment, +A, +SRA, +LC, +N, Q+T
6~ Straightening-Cutting to specified length-Finished Measuring Inspection
7~ Machanical Testing in own labs with Tensile Strength, Yield Strength, Elongation, Hardness, Impact, Mictrostruture etc
8~ Packing and Stocking.
100% of our steel tubes are dimensionally checked
100% of our steel tubes are visually checked to assure they have a perfect surface condition and no surface defects.
100% eddy current test and ultrosonic test to eliminate longitudinal and transversal defects.
Spec:
Material:SUS 304/316 ASTM 304/316/321 EN 1.4301/1.4541/1.4404 etc
Size Range:OD:0.4-12mm
WT:0.1-2mm
General Length:0.5-4m
Tolerance:
According to the following tables or customers’ request.
Chemical composition
| Steel grade | Chemical composition,% |
| C | Si | Mn | P | S | Ni | Cr | Mo | Ti |
| 0Cr18Ni9 | ≤0.07 | ≤1.00 | ≤2.00 | ≤0.035 | ≤0.030 | 8.00~11.00 | 17.00~19.00 | — | — |
| 00Cr19Ni10 | ≤0.03 | ≤1.00 | ≤2.00 | ≤0.035 | ≤0.030 | 8.00~12.00 | 18.00~20.00 | — | — |
| 0Cr18Ni10Ti | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.035 | ≤0.030 | 9.00~12.00 | 17.00~19.00 | — | >5C% |
| 0Cr17Ni12Mo2 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.035 | ≤0.030 | 10.00~14.00 | 16.00~18.50 | 2.00~3.00 | — |
| 00Cr17Ni14Mo2 | ≤0.03 | ≤1.00 | ≤2.00 | ≤0.035 | ≤0.030 | 12.00~15.00 | 16.00~18.00 | 2.00~3.00 | — |
| 1Cr18Ni9Ti | ≤0.12 | ≤1.00 | ≤2.00 | ≤0.035 | ≤0.030 | 8.00~11.00 | 17.00~19.00 | — | 5(C%-0.02~0.80) |
Mechanical properties
| Steel grade | Recommended heat treatment system | Tensile strength N/mm²(Mpa) | Elongation A% | Kg/dm³ |
| No less than |
| 0Cr18Ni9 | 1010~1150℃ | 520 | 35 | 7.93 |
| 00Cr19Ni10 | 1010~1150℃ | 480 | 35 | 7.93 |
| 0Cr18Ni10Ti | 920~1150℃ | 520 | 35 | 7.95 |
| 0Cr17Ni12Mo2 | 1010~1150℃ | 520 | 35 | 7.90 |
| 00Cr17Ni14Mo2 | 1010~1150℃ | 480 | 35 | 7.98 |
| 1Cr18Ni9Ti | 100~1100℃ | 520 | 35 | 7.90 |
| Note: Elongation shall be no less than 25% for tubes OD less than 3.2mm or WT less than 0.30mm |
Characteristic:
Good concentricity
Good OD and ID tolerance
High Precision
Stable quality
Smooth Roughness
TORICH QUALITY ASSURANCE
Processing:
Seamless and Welded
RAW MATERIAL
↓
INCOMING INSPECTION
↓
STORAGE → CUTTING→HAMMERING → PICKING LUBRICATION → CLEANING → PHOSPHORI CLEAN
↓
ENDS CUTTING←STRAIGHTENING←HEAT TREATMENT↔MIDDLLE CHECK↔ COLD DRAWING ← LUBRICATING
↓
FINAL INSPECTION→BUNDING→STORAGE
Technical Delivery Conditions:Usually delivered in BK or according to customer's request
Widely used in the field of:
Aerospace
Electronics
Scientific research
Chemical industry
Medical apparatus
Instrument areas
Product Images:
FAQ
Q: Are you trading company or manufacturer ?
A: A professional steel pipes materials inventor, manufacturer and solution provider
Q: How long is your delivery time?
A: Generally it is 7-14 days if the goods are in stock. or it is 30-60 days if the goods are not in stock, and it is according to quantity.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but you need to pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance , balance before shippment.
If you have another question, pls feel free to contact us
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GB/T 3090 SUS 304/316 Seamless Steel Tube Small Diameter Steel Tube Images
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