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Stainless steel round bar is a solid cylindrical rod made of stainless steel. It is used in a variety of applications such as construction, manufacturing, and various industries depending on the alloy and grade of the stainless steel used. The round bar can be supplied in different diameters, lengths, and finishes such as hot-rolled, cold-rolled, polished, and centerless ground. Stainless steel round bars are popular due to their exceptional corrosion resistance, durability, and aesthetic appeal. It is commonly used for making shafts, fasteners, screw machine parts, valves, and pumps. It is also seen in the food and beverage industry as well as in marine applications due to its resistance to harsh environmental conditions.

 Stainless Steel Round Bar Specifications

Stainless Steel Bar Length	2 to 6 meters or 8 to 20 feet
SS Rod Chamfering	Available in 30, 45 & 60 degree thru fully automatic both-end chamfering machine
Ultrasonic Test of ASTM A276 Threaded Rod	As per ASTM A-388, EN 10308 (class 1 to 4), API 6A/ISO it is 100% tested thru Digital Ultrasonic Flaw Detector, 10423:2003-PSL 3, MIL STD 2154, SEP 1920:1984
SS Round Bar Size Tolerances	h11
Tolerance of Cold Rolled SS Round Bar Length	Stock in special cut to length bar in tolerance – 0/+10mm (-0 +0.5 inch)
Surface Finish of Cold Rolled SS Bar	Cold drawn or Belt polished condition
Bar Heat Treatment	Annealed and Solution Annealed

Ứng dụng of Stainless Steel Round Bar

Stainless Steel Round Bar is used in a variety of industries, including defense, shipbuilding, aerospace, clothing, fabrication, cement, heavy earthmoving machinery, paper and pulp, and manufacturing.

• SS Round Bar used in Heavy engineering Industries for making heavy machines and tools for manufacturing various products.
• Railway engines and coaches are made with the usage of steel round bars
• The Agricultural sector uses the round bars to make the machinery and equipment required for agriculture.
• Stainless Steel Round Bars used in the Chemicals Industry
• Round bars are also used in the food processing industry for manufacturing machines.
• Stainless Steel Round Bars used in Plumbing
• The Oil and petroleum industry requires ss round bar

Size of stainless steel round bar

PRODUCTS	DIAMETER (MM)	LENGTH (MM)	DIAMETER TOLERANCE	STRAIGHTNESS (MM/M)
HOT ROLLED ROUND BAR	19-80.0	2500-6500	+-0.20~+-0.80	3.00
HOT ROLLED HEXAGON BAR	20.0-62.0	2500-6500	+-0.20~+-1.00	3.00
PEELED ROUND BAR	16.00-65.00	3000-6500	h10	0.50
COLD DRAWN ROUND BAR	2.0-63.50	2500-6500	h9	0.50
COLD DRAWN SQUARE BAR	2”	2500-6500	h11	1.00
COLD DRAWN HEXAGON BAR	2 1/2”	2500-6500	h11	1.00
CENTRELESS GRINDING ROUND BAR	3”	2500-6500	h8	0.30
COLD DRAWN SILILAR HEXAGON BAR	3 1/2”	2500-6500	h12	1.00

 Round Bar Chemical Composition

ASTM Grade	C	Mn	Si	S	P	Cr	Ni	Thứ Hai	Other
304	0.08 max	Tối đa 2,00	Tối đa 0,75	0,030 (tối đa)	0,045 (tối đa)	18.0-20.0	8.0 11.0	–	–
317L	0,035 (tối đa)	Tối đa 2,00	Tối đa 0,75	0,030 (tối đa)	0,045 (tối đa)	18.0-20.0	11.0 14.0	3.0 4.0	–
310 S	0.08 max	Tối đa 2,00	Tối đa 1,5	0,030 (tối đa)	0,045 (tối đa)	24.0-26.0	19.0 22.0	3.0 4.0	–
316	0.08 max	Tối đa 2,00	Tối đa 0,75	0,030 (tối đa)	0,045 (tối đa)	16.0-18.0	10.0 14.0	2.0 3.0	–
321	0.08	Tối đa 2,00	Tối đa 0,75	0,030 (tối đa)	0,045 (tối đa)	17.0-20.0	9.0 12.0	–	5C 0.70%
347 H	0.04 0.10	Tối đa 2,00	Tối đa 0,75	0,030 (tối đa)	0,045 (tối đa)	17.0- 19.0	9.0 13.0	–	10C(Cb+Ta)<1.

Mechanical Properties of Forged Stainless Steel Round Bar

Lớp	Độ giãn dài	Mật độ	Độ bền kéo	Giới hạn chảy (0,2%Offset)	Điểm nóng chảy
SS 202	40 %	8,0 g/cm³	515 MPa	275 MPa	1.454 °C (2.650 °F)
SS 303	50 %	55%	Psi – 85,000	Psi – 45,000	Rb 180
SS 304	40%	8,0 g/cm³	Psi – 75000 , MPa – 515	Psi – 30000 , MPa – 205	1.400 °C (2.550 °F)
SS 304L	40%	8,0 g/cm³	Psi – 75000 , MPa – 515	Psi – 30000 , MPa – 205	1.400 °C (2.550 °F)
SS 316	35 %	8,0 g/cm³	Psi – 75000 , MPa – 515	Psi – 30000 , MPa – 205	1.454 °C (2.650 °F)
Thép không gỉ 316L	40 %	8,0 g/cm³	485 Min	170 Min.	1.400 °C (2.550 °F)

Stainless Steel Round Bar Tolerances

COLD FINISHED ROUNDS
±.0015	5/16 to Under 1/2
±.001	Under 5/16
±.0025	1 to Under 1-1/2
±.002	1/2 to Under 1
±.005	Over 4 to 4-1/2 Incl.
±.003	1-1/2 to 4 Incl.
±.008	Over 4-1/2 to 6 Incl.

 

HOT ROLLED & ROUGH TURNED
+1/32 –0	Over 2 to 2-1/2	Out of Rd.
		0.23
+1/16 –0	Over 3-1/2 to 4-1/2	.046
+3/64 –0	Over 2-1/2 to 3-1/2	.035
+1/4 –0	Over 15 to 20	.125
+1/8 –0	Over5-1/2 to 6-1/2	.070
+5/64 –0	Over 4-1/2 to 5-1/2	.058
+3/16 –0	Over 8 to 12	.093
+5/32 –0	Over 6-1/2 to 8	.085
+7/32 –0	Over 12 to 15	.109

 

COLD FINISHED SQUARE AND HEX BAR
±.000–.003	5/16 to Under 1/2
±.000–.002	Under 5/16
±.000–.011	Over 3
±.000–.006	Over 1 to 2 Incl.
±.000–.004	1/2 to 1 Incl.
±.000–.008	Over 2 to 3 Incl.

 

PUMP SHAFT
	Tolerance Under		Diameter Over
1 to Under 1-1/2	–.0025		+.000
3/4 to Under 1	–.002		+.000
Over 4 to 4-1/2	–.005		+.000
1-1/2 to 4 Incl.	–.003		+.000
Over 4-1/2 to 5 Incl.	–.008		+.000
TOLERANCE STRAIGHTNESS
		Cold Finished		Hot Finished
		But May Not Exceed		But May Not Exceed
		1/16 Inch in Any Ft.,		1/8 Inch in Any 5 Ft.,
		1/16 x No. of Feet in Length		1/8 x No. of Feet in Length
		5		5

SS Round Bar Weight Per Foot

Đường kính	Weight	Đường kính	Weight
(inch)	per metre (kg)	(mm)	per metre (kg)
1/8 Inch	0.06	3 mm	0.06
3/16 Inch	0.14	4 mm	0.10
1/4 Inch	0.25	5 mm	0.16
5/16 Inch	0.39	6 mm	0.22
3/8 Inch	0.56	7 mm	0.30
7/16 Inch	0.77	8 mm	0.40
1/2 Inch	1.00	10 mm	0.62
9/16 Inch	1.22	12 mm	0.89
5/8 Inch	1.56	14 mm	1.22
11/16 Inch	1.89	15 mm	1.40
3/4 Inch	2.25	16 mm	1.59
7/8 Inch	3.07	18 mm	2.01
1 Inch	4.03	20 mm	2.48
		22 mm	3.00
		24 mm	3.57
		25 mm	3.88