Stainless Steel Hollow Bar

Kaysuns is a reliable supplier of stainless steel hollow bar and stainless steel heavy wall thickness tubings , including materials of austenitic stainless steel 304/304L, 316/316L etc, duplex stainless steel UNS S31803 S32205, super duplex stainless steel S32750 and high-alloy austenitic stainless steels to ASMT A511 and other specifications. Our stainless steel hollow bars are improved in processability without compromising corrosion resistance and mechanical strength. Corrosion test according to ASTM G-48 A, NACE MR 0175 / ISO 15156.

Hollow bar standard sizes range from outside diameter 32mm / 1.26 inch to 420mm / 16.54 inch with inside diameter ranging from 16mm / 0.63inch to 320mm / 12.6 inch.

Stainless steel hollow bar is usually delivered in 3.0m-7.0m random lengths or cutting lengths upon requirement. Kaysuns supplies cutting service for stainless steel hollow bar, the cutting length is available as per customer’s exact requirements.

Available Grades of Hollow Bars

ASTM	UNS	EN	DIN	JIS	GOST	GB	Remark
304	S30400		1.4301	SUS304		06Cr19Ni10	all sizes avaiable
304L	S30403		1.4307	SUS304L		022Cr19Ni10	all sizes avaiable
316	S31600	X5CrNiMo17-12-2	1.4401	SUS316		06Cr17Ni12Mo2	all sizes avaiable
316L	S31603	X2CrNiMo18-14-3	1.4404	SUS316L	03X17H14M3	022Cr17Ni12Mo2	all sizes avaiable
316TI	S31635	X6Cr_oTi17-12-2	1.4571	SUS316Ti	10X17H13M2T	06Cr1Ni12Mo3Ti	some sizes avaiable
S31803	S31803		1.4462			022Cr22Ni5Mo3N	some sizes avaiable
S32205	S32205		1.4462			022Cr23Ni5Mo3N	some sizes avaiable
S32750	S32750		1.441			022Cr25Ni7Mo4N	some sizes avaiable

Normal Chemical Composition of Stainless Steel Hollow Bars

Grade	C	Si	Mn	P	S	Ni	Cr	Mo	Ti	N	Nb
	max	max	max	max	max					max	max
TP304	0.08	1.00	2.00	0.045	0.030	8.0-11.0	18.0-20.0	–	–	–	–
TP304L	0.035	1.00	2.00	0.045	0.030	8.0-13.0	18.0-20.0	–	–	–	–
TP304H	0.04-0.10	1.00	2.00	0.045	0.030	8.0-11.0	18.0-20.0	–	–	–	–
TP321	0.080	1.00	2.00	0.045	0.030	9.0-12.0	17.0-19.0	–	5* (C+N) min, 0.70 max	0.10	–
TP321H	0.04-0.10	1.00	2.00	0.045	0.030	9.0-12.0	17.0-19.0	–	4* (C+N) min, 0.70 max	0.10	–
TP316	0.080	1.00	2.00	0.045	0.030	10.00-14.00	16.0-18.0	2.00 – 3.00	–	–	–
TP316L	0.04	1.00	2.00	0.045	0.030	10.00-14.00	16.0-18.0	2.00 – 3.00	–	–	–
TP316H	0.04-0.10	1.00	2.00	0.045	0.030	10.00-14.00	16.0-18.0	2.00 – 3.00	–	–	–
TP316Ti	0.08	0.75	2.00	0.045	0.030	10.0-14.0	16.0-18.0	2.00 – 3.00	–	–	–
TP317	0.080	1.00	2.00	0.045	0.030	11.0-15.0	18.0-20.0	3.00-4.00	–	–	–
TP317L	0.04	1.00	2.00	0.045	0.030	11.0-15.0	18.0-20.0	3.00-4.00	–	–	–
TP347	0.080	1.00	2.00	0.045	0.030	9.0-13.0	17.0-19.0	–	–	–	10*Cmin,1.00max
TP310S	0.08	1.00	2.00	0.045	0.030	19.0-22.0	24.0 – 26.0	0.75	–	–	–

*Other Grades can be offered on request.

Standards of Hollow Bar

Kaysuns stainless steel hollow bar standard items are tested according to below:
Certificate status according to EN 10204/3.1B (EN 10204 3.2 will be upon requirement)

Standards and testing for 304L, 316L, duplex 2205 Hollow Bar
ASTM SA511, ASTM A790 EN 10216-5 , EN 10294-2, EN 10297-2, Intergranular corrosion test acc. to ASTM A262 “E” / EN ISO 3651-2A in delivery condition NACE MR 0175/ISO 15156

Stainless Steel Hollow Bars Tolerance

General Requirements:

Outside diameter (OD)

+2/-0%, with a minimum of +1/-0 mm (+0.04/-0”) for 275mm below OD
+/-1% for 275 mm and above OD (10.827’’)

Inside diameter (ID)

+0/-2%, with a minimum +0/-1 mm (+0/-0.04″).

Straightness

Straightness deviation max. 1.5 mm per 1000 mm (0.059 inch per 3 feet).

Lengths

Random length. Fixed lengths are available on request.

* Tolerance according to ASTM A511 standard can be offered if required.

Dimension of Hollow Bar

The table shows common dimensions of hollow bar including finished part sizes. The chucked true values indicated are guaranteed values valid for lengths less than 2.5 times the outside diameter.

Hollow-Bar-Dimension Download

Cutting Service of Hollow Tube:

Kaysuns stainless steel hollow bar is delivered in random lengths or cut to fixed lengths on request. Random lengths from 2.5 to 6.5 m, depending on size and grade. Lengths down to 1 m may be included in the delivery.

We also accept cutting service upon requirement from client, like 300mm, 500mm, 800mm long etc , please get a contact with us.

Applications of Stainless Steel Hollow Bars

Stainless steel hollow bar is maily used for engineering industry and machine manufacturing, as well used in the industries of Chemical, Petrochemical, Nuclear Power, Automotive, Offshore, Railway Engineering, Mining Equipment etc.