stainless steel square tube manufacturers

Stainless Steel Sheet

Yearly output 150,000 MT
15 years experience
ASTM A240-480 SGS/ISO certified

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stainless steel square tube manufacturers

Short Description

Application:Industrial furnace and heater tubes

Outer Diameter:6mm

Tolerance:±0.02mm

Processing Service:Bending, Welding, Decoiling, Punching, Cutting, Moulding

Grade:200 Series,300 Series,400 Series

Basic Introduction

stainless steel square tube manufacturers

Stainless steel square tube is a hollow strip of steel, because the cross section is square so called square tube. A large number of used for conveying fluid pipelines, such as oil, natural gas, water, gas, steam, etc., in addition, in bending, torsion strength at the same time, lighter weight, so it is also widely used in manufacturing machinery parts and engineering structures.

Stainless steel square tube classification: square tube is divided into seamless steel tube and welded steel tube (seam pipe) two categories. According to section shape can be divided into square and rectangular tube, widely used is circular steel tube, but there are some semicircular, hexagonal, equilateral triangle, octagonal and other special-shaped steel tube.

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Collaborative Mills

2B Stainless Sheet

0.25-5.0mm

No.4 Stainless Plate

2.8-60mm

8k Stainless Sheet

0.25-3.0mm

Brushed Stainless Sheet

0.25-20mm

BA Stainless Sheet

0.25-2.0mm

Checker Stainless Sheet

2.5-20mm

Thickness Tolerance

Normally, different mills will apply 3 types tolerance, like 1.0mm, there will be 0.91-0.92mm/0.94-0.96mm/ 0.98-1.01mm. 3 stages to apply for different application.

02 Width Tolerance

Width tolerance mainly depends on the slitting and cutting machine. We use Taiwan and Italy machinery, which can guarantee +/-0.05 to +/-0.1mm

03 Diagonal Tolerance

Diagonal Tolerance is a key factor to show whether the cut is correct or not. The normal tolerance is +/-2mm。

ASTM A240/JIS Standard 4304

3.1 MTC is available once order confirmed，all of our products are conformed with JIS G4304 and ASTM A240 standard.

ASTM A240

JIS 4304

Available Grades

Available Size

ASTM A240

Steel Grade	Ni% Max.	Cr% Max.	C% Max.	Si% Max.	Mn% Max.	P% Max.	S% Max.	Mo% Max.	Ti% Max.	Other
S30400	8.0~10.5	17.5~19.5	0.07	0.75	2	0.045	0.03	–	–	N: 0.1 Max.
S30403	8.0~12.0	17.5~19.5	0.03	0.75	2	0.045	0.03	–	–	N: 0.1 Max.
S31603	10.0~14.0	16.0~18.0	0.03	0.75	2	0.045	0.03	2.0~3.0	–	N: 0.1 Max.
S43000	0.75	16.0~18.0	0.12	1	1	0.04	0.03	–	–	–

JIS 4304

Chemical Standard

Steel Grade	Ni% Max.	Cr% Max.	C% Max.	Si% Max.	Mn% Max.	P% Max.	S% Max.	Mo% Max.	Ti% Max.	Other
SUS304	8.0~10.5	18.0~20.0	0.08	1	2	0.045	0.03	–	–	–
SUS304L	9.0~13.0	18.0~20.0	0.03	1	2	0.045	0.03	–	–	–
SUS316L	12.0~15.0	16.0~18.0	0.03	1	2	0.045	0.03	2.0~3.0	–	–
SUS430	0.6	16.0~18.0	0.12	0.75	1	0.04	0.03	–	–	–

Mechanical Standard

Steel Grade	N/mm 2 MIN.	N/mm 2 MIN.	% MIN.	HRB MAX.	Bendability:	Bendability:
	Tensile Stress	Proof Stress	Elongation	Hardness	Bending Angle	Inside Radius
SUS304	520	205	40	90	No Require	–
SUS304L	480	175	40	90	No Require	–
SUS316L	480	175	40	90	No Require	–
SUS430	420	205	22	88	180°	1.0 time the thickness

ASTM A240 Chemical Standard

Steel Grade	Ni% Max.	Cr% Max.	C% Max.	Si% Max.	Mn% Max.	P% Max.	S% Max.	Mo% Max.	Ti% Max.	Other
S30400	8.0~10.5	17.5~19.5	0.07	0.75	2	0.045	0.03	–	–	N: 0.1 Max.
S30403	8.0~12.0	17.5~19.5	0.03	0.75	2	0.045	0.03	–	–	N: 0.1 Max.
S31603	10.0~14.0	16.0~18.0	0.03	0.75	2	0.045	0.03	2.0~3.0	–	N: 0.1 Max.
S43000	0.75	16.0~18.0	0.12	1	1	0.04	0.03	–	–	–

ASTM A240 Mechanical Standard

Steel Grade	N/mm 2 MIN.	N/mm 2 MIN.	% MIN.	HRB MAX.	HBW MAX.	Bendability:	Bendability:
	Tensile Stress	Proof Stress	Elongation	Hardness	Hardness	Bending Angle	Inside Radius
S30400	515	205	40	92	201	No Require	–
S30403	485	170	40	92	201	No Require	–
S31603	485	170	40	95	217	No Require	–
S43000	450	205	22A	89	183	180°	–

Available Grades

Great Britain BS970	U.S.A AISI/SAE	Germany W-Nr Din	Italy UNI	Japan JIS	France AFNOR	Spain UNE
17/4PH	ASTM A564 Grade 630	50049 1.4542	–	–	Z7CNU 17-04	–
303S31	303	1.4305 X10CrNiS18-9	X10CrNiS1809	SUS303	Z8CNF 18-09	F.5308
304S11	304L	1.4307 1.4306 X10CrNiS18-9	X3CrNi1811 X2CrNi1811	SCS19 SUS304L	Z1CN18-12 Z2CN18-10	F.3503
304S15	304	1.4301 X5CrNi1810	X5CrNi1810	SUS304	Z4CN19-10FF Z5CN17-08	F.3504
316S31	316	X5CrNiMo17133	X5CrNiMo1713 X8CrNiMo1713	SUS316	Z6CND18-12-03	–
316S11	316L	1.4404 X2CrNiMo17132	X2CrNiMo1713 X8CrNiMo1713	SUS316L	Z2CND17-12 Z2CND18-13	F.3533 F.3537
321S31	321	1.4541 X6CrNiTi18-10	X6CrNiTi1811	SUS321	Z6CNT18-10	F.3523
310	310 310S	1.4845 X12CrNi25-21	X6CrNi2521	SUH310 SUS310S	Z8CN25-20 Z12CN25-20	–
416S21	416	1.4005 X12CrS13	X12CrS13	SUS416	Z11CF13	F.3411
420S29	–	1.4024 X15Cr13	–	SUS410J1	Z13C13	F.3415
420S37	420	1.4021 X20Cr13	X20Cr13	SUS420J1	Z20C13	F.3402
420S45	420F	1.4028 1.4034 X30Cr13	(G)X30Cr13	SUS420J2	Z30C13 Z33C13	F.3403
410S21	410	1.4006 1.4000 X12Cr13	X12Cr13 X109Cr13	SUS410	Z10C13	F.3401
431S29	431	1.4057 X20CrNi172	X16CrNi16	SUS431	Z15CN16-02	F.3427

Available Size

Thickness	Width	Length	Surface Finish
15~85 mm	914, 1219, 1524 mm	3048, 6069 mm Max.10M	Black
3~8 mm	20~2000 mm	3048, 6069 mm Max.10M	No.1
8 up ~ 60 mm	30~2000 mm	Max. 6096 mm	No.1
0.23-3.0mm	30-1524-2000mm	Max. 10M	2B/No.4/HL/8K

MTC from collaborative Mills

For each and every batch， Original MTC will be provided to guarantee the origin.

PVC Film

PVC film is one of the most important factor when purchasing stainless steel material. Basically, 3 types of PVC films are typically applied.

PE50/PE80 black and white film

This is the most widely used film, the thickness normally ranges from 50 micron to 80 microns. There will not be any special function except protection.,

Laser Film(Novacel 4228)

Laser cutting is often applied as a downstream processing. Laser film is a film that can undertake high temperature. If clients apply the wrong pvc, after laser cutting, the pvc will be wrinkled and sticky to the surface.