China AISI 304 stainless steel polishing tube Manufacturer, Supplier

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China AISI 304 stainless steel polishing tube Manufacturer, Supplier

Stianless Steel Welded Pipe /TUBE: 1. : Grade :201 202 304 304l 316 316l 2. Standard:ASTM DIN JIS AISI GB 3.Surface: 2B BA NO.4 Mirror 320# 380# 400#600# 800# 4.Length :6M 11.5 M 12M or As Per your requirment. 5.OD :Round Tube 9.52-219MM Retangle :10*10-150-150 6.Inner packing :Plastic Bag 7.Outer Packing: Carton /Woven/Wooden Packaging 8.Od:+/- 0.2mm, Thickness: +/- 0.02mm

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Product Description

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General Properties

Alloy 304L is a T-300 series stainless steel austenitic, which has a minimum of 18% chromium and 8% nickel. Type 304L has a carbon maximum of 0.030. It is the standard "18/8 stainless" that is commonly found in pans and cooking tools. Alloys 304L is the most versatile and widely used alloy in the stainless steel family.

Ideal for a wide variety of home and commercial applications, Alloys 304L exhibits excellent corrosion resistance and has a high ease of fabrication, outstanding formability. The austenitic stainless steels are also considered to be the most weldable of the high-alloy steels and can be welded by all fusion and resistance welding processes.

Specifications: UNS S30403

Applications

Alloy 304L Stainless Steel is used in a wide variety of home and commercial applications, including:

Food processing equipment, particularly in beer brewing, milk processing, and wine making
Kitchen benches, sinks, troughs, equipment, and appliances
Architectural trim and molding
Automotive and aerospace structural use
Construction material in large buildings
Chemical containers, including for transport
Heat exchangers
Nuts, bolts, screws, and other fasteners in the marine environment
Dyeing industry
Woven or welded screens for mining, quarrying & water filtration

Standards

ASTM/ASME: S30403
EURONORM: 1.4303
AFNOR: Z2 CN 18.10
DIN: X2 CrNi 19 11

Corrosion Resistance

Resistance to corrosion in oxidizing environments is a result of the 18 to 19% chromium that the 304 alloys contain.
Resistance to moderately aggressive organic acids is a result of the 9 to 11% nickel that the 304 alloys contain.
At times, alloy 304L may show a lower corrosion rate than the higher carbon Alloy 304; otherwise, the 304, 304L, and 304H may be considered to perform uniformly in most corrosive environments.
Alloy 304L is preferred for use in environments sufficiently corrosive to cause intergranular corrosion of welds and heat-affected zones on susceptible alloys.

Heat Resistance

Good oxidation resistance in intermittent service to 1600°F and in continuous service to 1690°F.
Continuous use of 304 in the 800-1580°F range is not recommended if subsequent aqueous corrosion resistance is important.
Grade 304L is more resistant to carbide precipitation and can be heated into the above temperature range.

Properties of 304 Alloy

Welding Characteristics:

Excellent welding properties; post-weld annealing is not required when welding thin sections. Two important considerations in producing weld joints in the austenitic stainless steels are:

Preservation of corrosion resistance
Avoidance of cracking

Processing - Hot Forming:

To forge, heat uniformity to 2100 / 2300 °F
Do not forge below 1700 °F
Forging can be air cooled without danger of cracking

Processing - Cold Forming:

Its austenitic structure allows it to be deep-drawn without intermediate annealing, making this the stainless steel grade of choice in the manufacturing of sinks, hollow-ware and saucepans. These grades work harden rapidly. To relieve stresses produced in severe forming or spinning, parts should be full annealed or stress relief annealed as soon as possible after forming.

Machinability:

The use of chip breakers is advised since the chips can be stringy. Stainless steel work harden rapidly, heavy positive feeds, sharp tooling, and a rigid set-up should be used. Cut below the work-hardened layer resulting from the previous passes.

Chemical Properties:

Grade	C	Mn	Si	P	S	Cr	Ni	N
304L	0.03max	2.0max	0.75max	0.45max	0.03max	min: 18.0 max: 20.0	min: 8.0 max: 12.0	0.10 max

Mechanical Properties:

Grade	Tensile Strength ksi (min)	Yield Strength 0.2% ksi (min)	Elongation %	Hardness (Brinell) MAX	Hardness (Rockwell B) MAX
304L	70	25	40	201	92

Physical Properties:

Density lbm/in³	Thermal Conductivity (BTU/h ft. °F)	Electrical Resistivity (in x 10⁻⁶)	Modulus of Elasticity (psi x 10⁶)	Coefficient of Thermal Expansion (in/in)/°F x 10⁻⁶	Specific Heat (BTU/lb/°F)	Melting Range (°F)
at 68°F: 0.285	9.4 at 212°F	28.3 at 68°F	28	9.4 at 32 - 212°F	0.1200 at 68°F to 212°F	2500 to 2590
	12.4 at 932 °F	39.4 at 752°F		10.2 at 32 - 1000°F
		49.6 at 1652 °F		10.4 at 32 - 1500°F

Specifications

Item: stainless steel polishing pipe
Type: welded or seamless
Standard: ASTM A554, JIS, DIN
Grade: 201, 202, 304, 304L, 316, 316L, 409, 430, etc.
Size:
- Round pipe: OD 8-219mm
- Square Pipe: OD 10x10mm - 150x150mm
- Rectangle Pipe: 10x20mm to 120x180mm
Thickness: 0.2-4.0mm
Pipe surface: 180G, 320G, 400G, 500G, 600G, Satin, hairline, 2B, BA, mirror, 8K
Pipe length: 5.8m, 6M, 11.85M, 12m
Application:
1. Decoration usage (road, bridge handrail, railing, bus stop, airport and gym)
2. Construction and ornament
3. Industry area (petroleum, food, chemical, paper, fertilizer, fabric, aviation and nuclear)

Square Steel Tube (mm)	Rectangular Steel Tube (mm)	Round Steel Tube (mm)
10×10×0.6~3.0	10×20×0.6~3.0	6x0.6~1.0
15×15×0.6~3.0	20×30×0.6~3.0	12x0.6~1.5
20×20×0.6~3.0	20×40×0.6~3.0	13x0.6~1.5
25×25×0.6~3.0	25×50×0.6~3.5	16x0.6~2.0
30×30×0.6~3.5	30×50×0.6~3.5	19x0.6~3.0
40×40×0.6~3.5	40×60×0.6~3.5	20x0.6~3.0
50×50×0.6~3.5	40×80×0.6~3.5	22x0.6~3.0
60×60×0.6~3.5	60×80×1.0~6.0	25x0.6~3.0
70×70×0.6~3.5	50×100×1.0~6.0	27x0.6~3.0
75×75×0.6~3.5	60×120×1.0~6.0	32x0.6~3.0
80×80×1.0~6.0	80×120×2.0~8.0	40x0.6~3.5
100×100×2.0~8.0	80×160×2.0~8.0	38x0.6~3.0
120×120×2.0~8.0	100×150×2.0~8.0	48x0.6~3.5
150×150×2.0~8.0	100×200×2.0~8.0	60x0.6~3.5
200×200×4.0~16.0	150×250×4.0~12.0	76x0.6~3.5
250×250×4.0~16.0	200×300×4.0~16.0	89x1.0~6.0
300×300×4.0~16.0	300×400×4.0~16.0	104x1.0~6.0
400×400×4.0~16.0	300×500×4.0~16.0	114x1.0~6.0

Physical Properties & Composition of Stainless Steel Polishing Pipe:

Grade	Carbon, max	Manganese, max	Phosphorus, max	Sulfur, max	Silicon, max	Nickel	Chromium	Molybdenum	Titanium	Columbium + Tantalum
Austenitic
301	0.15	2.00	0.040	0.030	1.00	6.0–8.0	16.0–18.0	...	...	...
302	0.15	2.00	0.040	0.030	1.00	8.0–10.0	17.0–19.0	...	...	...
304	0.08	2.00	0.040	0.030	1.00	8.0–11.0	18.0–20.0	...	...	...
304L	0.035A	2.00	0.040	0.030	1.00	8.0–13.0	18.0–20.0	...	...	...
305	0.12	2.00	0.040	0.030	1.00	10.0–13.0	17.0–19.0	...	...	...
309S	0.08	2.00	0.040	0.030	1.00	12.0–15.0	22.0–24.0	...	...	. . .
309S-Cb	0.08	2.00	0.040	0.030	1.00	12.0–15.0	22.0–24.0	...	...	B
310S	0.08	2.00	0.040	0.030	1.00	19.0–22.0	24.0–26.0	...	...	...
316	0.08	2.00	0.040	0.030	1.00	10.0–14.0	16.0–18.0	2.0–3.0	...	...
316L	0.035A	2.00	0.040	0.030	1.00	10.0–15.0	16.0–18.0	2.0–3.0	...	...
317	0.08	2.00	0.040	0.030	1.00	11.0–14.0	18.0–20.0	3.0–4.0	...	...
321	0.08	2.00	0.040	0.030	1.00	9.0–13.0	17.0–20.0	...	C	...
330	0.15	2.00	0.040	0.030	1.00	33.0–36.0	14.0–16.0	...	...	...
347	0.08	2.00	0.040	0.030	1.00	9.0–13.0	17.0–20.0	...	...	B
429	0.12	1.00	0.040	0.030	1.00	0.50 max	14.0–16.0	...	...	...
430	0.12	1.00	0.040	0.030	1.00	0.50 max	16.0–18.0	...	...	...
430-Ti	0.10	1.00	0.040	0.030	1.00	0.075 max	16.0–19.5	...	5 × C min, 0.75 max	...

▼ Stainless Steel Coiled Tubing / Coiled Tubes Material Grade:

U.S.A. (AISI)	GERMANY (DIN 17006)	GERMANY (W.N. 17007)	FRANCE (AFNOR)	JAPAN (JIS)	ITALY (UNI)	SWEDEN (SIS)	U.K. (BSI)	E.U. (EURONORM)	SPAIN	RUSSIA
201	-	-	-	SUS 201	-	-	-	-	-	-
301	X 12 CrNi 17 7	1.4310	Z 12 CN 17-07	SUS 301	X 12 CrNi 1707	23 31	301S21	X 12 CrNi 17 7	X 12 CrNi 17-07	-
302	X 5 CrNi 18 7	1.4319	Z 10 CN 18-09	SUS 302	X 10 CrNi 1809	23 31	302S25	X 10 CrNi 18 9	X 10 CrNi 18-09	12KH18N9
303	X 10 CrNiS 18 9	1.4305	Z 10 CNF 18-09	SUS 303	X 10 CrNiS 1809	23 46	303S21	X 10 CrNiS 18 9	X 10 CrNiS 18-09	-
303 Se	-	-	Z 10 CNF 18-09	SUS 303 Se	X 10 CrNiS 1809	-	303S41	-	X 10 CrNiS 18-09	12KH18N10E
304	X 5 CrNi 18 10 / X 5 CrNi 18 12	1.4301 / 1.4303	Z 6 CN 18-09	SUS 304	X 5 CrNi 1810	23 32	304S15 / 304S16	X 6 CrNi 18 10	X 6 CrNi 19-10	08KH18N10 / 06KH18N11
304 N	-	-	-	SUS 304N1	X 5 CrNiN 1810	-	-	-	-	-
304 H	-	-	-	SUS F 304H	X 8 CrNi 1910	-	-	-	X 6 CrNi 19-10	-
304 L	X 2 CrNi 18 11	1.4306	Z 2 CN 18-10	SUS 304L	X 2 CrNi 1911	23 52	304S11	X 3 CrNi 18 10	X 2 CrNi 19-10	03KH18N11
-	X 2 CrNiN 18 10	1.4311	Z 2 CN 18-10-Az	SUS 304LN	X 2 CrNiN 1811	23 71	-	-	-	-
305	-	-	Z 8 CN 18-12	SUS 305	X 8 CrNi 1812	23 33	305S19	X 8 CrNi 18 12	X 8 CrNi 18-12	-
-	-	-	Z 6 CNU 18-10	SUS XM7	-	-	-	X 6 CrNiCu 18 10 4 Kd	-	-
309	X 15 CrNiS 20 12	1.4828	Z 15 CN 24-13	SUH 309	X 16 CrNi 2314	-	309S24	X 15 CrNi 23 13	-	-
309 S	-	-	-	SUS 309S	X 6 CrNi 2314	-	-	X 6 CrNi 22 13	-	-
310	X 12 CrNi 25 21	1.4845	-	SUH 310	X 22 CrNi 2520	-	310S24	-	-	20KH23N18
310 S	X 12 CrNi 25 20	1.4842	Z 12 CN 25-20	SUS 310S	X 5 CrNi 2520	23 61	-	X 6 CrNi 25 20	-	10KH23N18
314	X 15 CrNiSi 25 20	1.4841	Z 12 CNS 25-20	-	X 16 CrNiSi 2520	-	-	X 15 CrNiSi 25 20	-	20KH25N20S2
316	X 5 CrNiMo 17 12 2	1.4401	Z 6 CND 17-11	SUS 316	X 5 CrNiMo 1712	23 47	316S31	X 6 CrNiMo 17 12 2	X 6 CrNiMo 17-12-03	-
316L	X 2 CrNiMo 17 13 2	1.4404	Z 2 CND 17-12	SUS 316L	X 2 CrNiMo 1712	23 48	316S11	X 3 CrNiMo 17 12 2	X 2 CrNiMo 17-12-03	03KH17N14M2
321	X 6 CrNiTi 18 10	1.4541	Z 6 CNT 18-10	SUS 321	X 6 CrNiTi 1811	23 37	321S31	X 6 CrNiTi 18 10	X 6 CrNiTi 18-11	08KH18N10T

Factory Overview

Quality Advantage

The quality of our products for the control line in oil and gas sector is assured not just during the controlled manufacturing process but also by way of finished product testing. Typical tests include:

Non-destructive tests
Hydrostatic tests
Surface finish controls
Dimensional accuracy measurements
Flare and coning tests
Mechanical and chemical property testing

Capillary Tube Applications

Medical device industry
Temperature-guided industrial temperature control, sensors used pipe, tube thermometer
Pens care industry core tube
Micro-tube antenna, various types of small precision stainless steel antenna
Various electronic small-diameter stainless steel capillaries
Jewelry needle punch
Watches and picture accessories
Car antenna tube, bar antennas using tubes, antenna tube
Laser engraving equipment to use stainless steel tube
Fishing gear, accessories, and Yugan out parts
Dietary appliances with stainless steel capillary
All types of mobile phone stylus and computer stylus
Heating pipe industry and oil industry
Printers and silent box needle
Pull a double-melt stainless steel tube used in window-coupled components
A variety of industrial small diameter precision stainless steel tubes
Precision dispensing with stainless steel needles
Microphone, headphones, and microphone stainless steel tubing

Product Packing & Display

Frequently Asked Questions (FAQ)

What are the primary characteristics of Alloy 304L stainless steel?

Alloy 304L is a T-300 series austenitic stainless steel containing a minimum of 18% chromium and 8% nickel. It features a low carbon content (maximum 0.030%), making it highly resistant to corrosion, exceptionally weldable, and highly formable.

Why is 304L preferred over standard 304 in welding applications?

Grade 304L has a lower carbon content (max 0.03%) compared to grade 304 (max 0.08%). This reduces the risk of carbide precipitation during welding, eliminating the need for post-weld annealing on thin sections and ensuring superior corrosion resistance in weld zones.

What types of testing are conducted to ensure product quality?

To verify the mechanical integrity and surface finish, products undergo non-destructive testing, hydrostatic testing, surface finish controls, dimensional accuracy measurements, flare and coning tests, alongside comprehensive mechanical and chemical property analyses.

What sizing options are available for stainless steel polishing tubes?

Polishing tubes are available in multiple shapes: Round tubes (OD 8-219mm), Square tubes (10x10mm to 150x150mm), and Rectangular tubes (10x20mm to 120x180mm), with a thickness range between 0.2mm and 4.0mm.

What are the recommended temperature limits for 304L stainless steel?

Alloy 304L shows good oxidation resistance up to 1600°F in intermittent services and up to 1690°F in continuous service. However, continuous exposure in the 800-1580°F range is not advised if subsequent aqueous corrosion resistance is critical.

What industries commonly use stainless steel capillary tubes?

Stainless steel capillaries are extensively used in medical devices, industrial temperature sensors, electronics, automotive antennas, laser engraving machinery, marine/fishing gear, and audio hardware like microphones and headphones.