Stainless Steel Round Bar

Round Bar is solid, cylindrical bar with a consistent circular cross-section. 

Stirlings stocks Round Bar manufactured to ASTM A276/484, in Austenitic Grades 304 and 316, Duplex 2205, Super Duplex 2507.  

Stirlings also stocks Round Bar in specialist Martensitic Precipitation Hardening Grade 630 (17-4PH), manufactured to ASTM A564. Learn more about our Grade 630 Round Bar here. 

Also available is the high-performance Austenitic Grade 253MA (UNS S30815), created by Outukumpu. 

Round Bar is available in Cold Drawn Polished, Centerless Ground and Peeled Finishes. For other Finishes, contact us. 

Stirlings stocks Flat bar in various lengths in sizes from 3.18mm to 400.00mm. Everything currently in stock is specified in the tables below. Other Grades are available on an indent basis. 

● Stocked Item ○ Market Available

Anything not currently in stock/Market Available can be obtained via indent.

Size (mm) 304 316 630 253 MA* 2205 2507 Weight
  BR304 BR316 BR630 BR253 BR2205 BR2507  (kg/m)
3.18 ● ● ○ ○ ○ ○ 0.06
3.97 ○ ○ ○ ○ ○ ○ 0.09
4.76 ● ● ○ ○ ○ ○ 0.14
5.00 ○ ○ ○ ○ ○ ○ 0.15
5.54 ○ ○ ○ ○ ○ ○ 0.19
6.00 ● ● ○ ● ○ ○ 0.22
6.35 ● ● ○ ○ ○ ○ 0.25
7.94 ● ● ○ ○ ○ ○ 0.39
8.00 ● ○ ○ ● ○ ○ 0.39
9.52 ● ● ○ ○ ○ ○ 0.56
10.00 ● ● ○ ● ● ○ 0.61
11.11 ○ ○ ○ ○ ○ ○ 0.76
12.00 ● ● ○ ● ○ ○ 0.89
12.70 ● ● ○ ○ ● ○ 0.99
14.29 ○ ○ ○ ○ ○ ○ 1.26
15.88 ● ● ○ ○ ○ ● 1.56
16.00 ● ● ○ ● ● ● 1.58
19.05 ● ● ○ ○ ○ ○ 2.24
20.00 ● ● ○ ● ● ● 2.47
22.00 ○ ● ○ ○ ○ ○ 2.99
22.22 ○ ● ○ ○ ○ ○ 3.05
24.00 ○ ● ○ ○ ○ ○ 3.56
25.00 ○ ● ● ● ● ● 3.86
25.40 ● ● ○ ○ ● ○ 3.99
28.58 ○ ○ ○ ○ ○ ○ 5.05
30.00 ○ ● ○ ○ ● ● 5.57
31.75 ● ● ● ○ ● ○ 6.23
34.93 ○ ● ○ ○ ○ ○ 7.55
35.00 ○ ○ ○ ○ ○ ○ 7.58
38.10 ○ ● ○ ○ ● ○ 8.98

 

Size (mm) 304 316 630 253MA* 2205 2507 Weight(kg/m)
40.00 ● ● ○ ● ● ● 9.90
44.45 ○ ● ● ○ ● ● 12.23
45.00 ○ ○ ○ ○ ○ ● 12.62
47.62 ○ ○ ○ ○ ○ ○ 14.03
48.00 ○ ○ ○ ○ ○ ○ 14.26
50.00 ● ● ○ ● ○ ● 15.47
50.80 ● ● ○ ○ ● ○ 15.97
55.00 ○ ○ ○ ○ ○ ● 18.85
57.15 ○ ● ● ○ ● ○ 20.21
60.00 ● ● ○ ○ ○ ○ 23.02
62.00 ○ ○ ○ ○ ○ ○ 23.79
63.50 ● ● ● ○ ● ○ 24.95
65.00 ○ ● ○ ○ ○ ● 26.35
69.85 ○ ● ● ○ ● ○ 30.20
70.00 ● ● ○ ● ○ ○ 33.01
75.00 ○ ● ○ ○ ○ ● 35.04
76.20 ● ● ● ○ ● ○ 35.94
80.00 ○ ● ○ ○ ● ● 39.70
82.55 ○ ○ ● ○ ○ ○ 42.18
85.00 ○ ○ ○ ○ ○ ● 44.80
88.90 ○ ● ● ○ ● ○ 48.92
90.00 ○ ○ ○ ● ○ ● 50.14
95.25 ○ ● ○ ○ ○ ○ 56.52
100.00 ○ ○ ○ ○ ○ ○ 61.90
101.60 ● ● ● ○ ● ● 63.89
114.30 ○ ● ● ○ ● ○ 80.86
107.95 ○ ● ○ ○ ○ ○ 72.30
120.00 ● ● ○ ○ ○ ○ 88.73
120.65 ○ ○ ● ○ ○ ○ 90.16
127.00 ○ ● ● ○ ○ ○ 99.83
130.00 ● ○ ● ○ ● ● 112.41
139.70 ○ ○ ○ ○ ○ ○ 120.80
140.00 ○ ● ○ ○ ○ ○ 121.50
150.00 ● ● ○ ○ ● ● 141.50
152.40 ○ ○ ● ○ ○ ○ 143.76
160.00 ○ ○ ○ ○ ○ ○ 157.83
170.00 ● ● ○ ○ ● ○ 178.08
177.80 ○ ○ ○ ○ ○ ○ 195.70
180.00 ○ ● ○ ○ ○ ● 203.28
195.00 ○ ○ ○ ○ ○ ○ 234.44
200.00 ● ○ ○ ○ ● ● 251.50
203.20 ○ ● ○ ○ ○ ○ 255.60
210.00 ○ ○ ○ ○ ○ ○ 271.89
220.00 ○ ○ ○ ○ ○ ● 301.53
228.60 ○ ○ ○ ○ ○ ○ 323.50
230.00 ○ ● ○ ○ ● ○ 325.97
240.00 ○ ● ○ ○ ○ ● 355.13
250.00 ○ ● ○ ○ ● ○ 385.13
254.00 ○ ○ ○ ○ ○ ○ 399.90
260.00 ○ ● ○ ○ ● ○ 419.00
270.00 ○ ○ ○ ○ ● ○ 452.00
280.00 ○ ● ○ ○ ○ ● 483.10
300.00 ○ ○ ○ ○ ● ○ 558.00
302.00 ○ ○ ○ ○ ○ ● 568.00
304.00 ○ ● ○ ○ ○ ○ 569.47
310.00 ● ○ ○ ○ ○ ○ 590.94
325.00 ○ ○ ○ ○ ● ○ 655.00
350.00 ○ ● ○ ○ ● ● 760.00
400.00 ○ ● ○ ○ ● ● 992.00

 

253MA® is a trademark owned by Outokumpu Stainless AB. The standard grade designation covering this grade is UNS S30815. Other mills produce grades compliant with UNS S30815.

 

Technical Data

Round Bar

Typical Tolerance of Diameter (x)
Nominal Diameter 6 7 8
Up to 3 0.006 0.010 0.014
Over 3 to 6 0.008 0.012 0.018
Over 6 to 10 0.009 0.015 0.022
Over 10 to 18 0.011 0.018 0.027
Over 18 to 30 0.013 0.021 0.033
Over 30 to 50 0.016 0.025 0.039
Over 50 to 80 0.019 0.030 0.046
Over 80 to 120 0.022 0.035 0.054
Over 120 to 180 0.025 0.040 0.063
Over 180 to 250 0.029 0.046 0.072
Over 250 to 315 0.032 0.052 0.081
Over 315 to 400 0.036 0.057 0.089
Over 400 to 500 0.040 0.063 0.097

 

Typical Tolerance of Diameter (x)
Nominal Diameter 9 10 11
Up to 3 0.025 0.040 0.060
Over 3 to 6 0.030 0.048 0.075
Over 6 to 10 0.036 0.058 0.090
Over 10 to 18 0.043 0.070 0.110
Over 18 to 30 0.052 0.084 0.130
Over 30 to 50 0.062 0.100 0.160
Over 50 to 80 0.074 0.120 0.190
Over 80 to 120 0.087 0.140 0.220
Over 120 to 180 0.100 0.160 0.250
Over 180 to 250 0.115 0.185 0.290
Over 250 to 315 0.130 0.210 0.320
Over 315 to 400 0.140 0.230 0.360
Over 400 to 500 0.155 0.250 0.400

 

Typical Tolerance of Diameter (x)
Nominal Diameter 12 13 14
Up to 3 0.100 0.140 0.250
Over 3 to 6 0.120 0.180 0.300
Over 6 to 10 0.150 0.220 0.360
Over 10 to 18 0.180 0.270 0.430
Over 18 to 30 0.210 0.330 0.520
Over 30 to 50 0.250 0.390 0.620
Over 50 to 80 0.300 0.460 0.740
Over 80 to 120 0.350 0.540 0.870
Over 120 to 180 0.400 0.630 1.000
Over 180 to 250 0.460 0.720 1.150
Over 250 to 315 0.520 0.810 1.300
Over 315 to 400 0.570 0.890 1.400
Over 400 to 500 0.630 0.970 1.550

 

h tolerance = (+0.0mm - x figure) ♦ j tolerance = (+ and -(x) figure) ♦ k tolerance = (+ x figure - 0.0mm)

e.g. Diameter tolerance is +0.0mm - 0.062mm for 38.1mm diameter round bar to h9 specification