ASTM A 276

Standard specification for stainless and heat resisting steel bright bars and shapes.

This specification covers hot finished or cold finished bars except bars for re-forging and hot rolled or extruded shapes, such as angles, tees and channels in the more coMMonly used type of stainless steel, excluding the free matching types of general corrosion resistance and high temperatures services.

Manufactured conditions are available as follows:

A - Annealed
H - Hardened and tempered at a relative low temperature.
T - Hardened and tempered at a relatively high temperature.
S - Stain hardened relatively high cold work.
B - Relatively severe cold work.

ASTM A 314

Standard specification for stainless and heat resisting and bars for forgings.

The specification covers stainless and heat resisting steel billets and bars intended only for forgings.

ASTM A 582

Standard specification for free machining stainless and heat resisting steel bars, hot rolled or cold finished.

Typical grades are types 303, 303SE, 416 etc. This specification covers hot finished or cold finished bars, except bars for forging. It includes rounds, square and hexagons in the more coMMonly used types of stainless and heat resisting free machining steel designed especially for optimum mach inability and for general corrosion and high temperature services.

ASTM A 476

Standard specification for stainless and heat resisting steel bars and shapes for used in boilers and other pressure vessels.

The specification covers hot and cold finished bars of stainless and heat resisting steel, including rounds, squares and hexagons and hot rolled or extruded shapes such a angles, tees and channels for use in boiler and pressure vessels construction. It is also related to the ASME boiler and pressure vessel code SA-279 section II.

ASTM A 484

Standard specification general requirements for stainless and heat resisting bars, billets and forgings.

This specification covers general requirements which shall apply to stainless and heat resisting wrought steel bars, shapes forgings and billets or other semi finished material (except wire) for forging. Pertinent details contained in this specification are tolerances for size, width, thickness, length and straightness of bars materials.

Conditions and Surface Finish

Stainless and heating resisting bars are produced in various conditions and surface finished. It is important that conditions be associated with the appropriate finish because each finish is not applicable to every condition.

ASTM Tolerance

Stainless and heating resisting bars are produced in various conditions and surface finished. It is important that conditions be associated with the appropriate finish because each finish is not applicable to every condition.

Specified Size, in (MM)
Permissible Variation from Specified Size in (MM)
Over Under
Out of Round or Out of Square in (MM)
3/16 to 7/16 (8.00 to 11.00), incl 0.006 (0.15) 0.006 (0.15) 0.009 (0.23)
3/16 to 7/16 (8.00 to 11.00), incl 0.007 (0.18) 0.007 (0.18) 0.010 (0.26)
Over 5/8 to 7/8 (15.50 to 22.00), incl 0.008 (0.20) 0.008 (0.20) 0.012 (0.30)
Over 7/8 to 1 (22.00 to 25.00), incl 0.009 (0.23) 0.009 (0.23) 0.013 (0.34)
Over 1 to 1-1/8 (25.00 to 28.00), incl 0.010 (0.25) 0.010 (0.25) 0.015 (0.38)
Over 1-1/8 to 1-1/4 (28.00 to 31.50). incl 0.011 (0.28) 0.011 (0.28) 0.016 (0.42)
Over 1-1/4 to 1-3/8 (31.50 to 34.50), incl 0.012 (0.30) 0.012 (0.30) 0.018 (0.46)
Over 1-3/8 to 1-1/2 (34.50 to 38.00), incl 0.014 (0.35) 0.014 (0.35) 0-021 (0.53)
Over 1-1/2 to 2 (38.00 to 50.00), incl 1/64 (0.40) 1/64 (0.40) 0.23 (0.60)
Over 2 to 2-1/2 (50.00 to 63.00), incl 1/32 (0.80) 0 0.23 (0.60)
Over 2-1/2 to 3-1/2 (63.00 to 90.00), incl 3/64 (1.20) 0 0.035 (0.90)
Over 3-1/2 to 4-1/2 (90.00 tom 115.00), incl 1/16 (1.60) 0 0.048 (1.20)
Over 4-1/2 to 5-1/2 (115.00 to 140.00), incl 5/64 (2.00) 0 0.058 (1.50)
Over 5-1/2 to 6-1/2 (140.00 to 165.00), incl 1/8 (3.00) 0 0.70 (1.80)
Over 6-1/2 to 8 (165.00 to 200.00), incl 5/32 (4.00) 0 0.85 (2.20)
Over 8 to 12 (200.00 to 300.00), incl 3/18 (4.80) 0 3/32 (2.40)
Over 12 to 15 (300.00 to 400.00), incl 7/32 (5.50) 0 7/64 (2.80)
Over 15 to 25 (400.00 to 625.00), incl 1/4 (6.50) 0 1/8 (3.20)

DIN Tolerance

Size Range h6 h7 h8 h9 h11 h12 h13 K12/K13
Over 1MM to 3MM +0/-0.006 +0/-0.01 +0/-0.014 +0/-0.025 +0/-0.06 +0/-0.10 -0.14 -
Over 3MM to 6 MM +0/-0.008 +0/-0.012 +0/-0.018 +0/-0.030 +0/-0.075 -0.120 -0.180 -
Over 6MM to 10MM +0/-0.009 +0/-0.015 +0/-0.022 +0/-0.036 +0/-0.090 -0.150 -0.220 -
Over 10MM to 18MM +0/-0.011 +0/-0.018 +0/-0.027 +0/-0.043 +0/-0.110 -0.180 -0.270 -
Over 18MM to 30MM +0/-0.013 +0/-0.021 +0/-0.033 +0/-0.052 +0/-0.130 -0.210 -0.330 +0.10/+0.15
Over 30MM to 50 MM +0/-0.016 +0/-0.025 +0/-0.039 +0/-0.062 +0/-0.160 -0.250 -0.390 +0.15/+0.20
Over 50MM to 80MM +0/-0.019 +0/-0.030 +0/-0.046 +0/-0.074 +0/-0.190 -0.300 -0.460 +0.20/+0.25
Over 80MM to 120MM +0/-0.022 +0/-0.035 +0/-0.054 +0/-0.087 +0/-0.220 -0.350 -0.540 +0.25/+0.30

Hardness Conversion Chart

Brinell Hardness HB Vickers Hardness HV Rockwell Hardness HRC Rockwell Hardness HRB Tensile Strength ksi
321 339 34 108 158
311 328 33 108 154
302 319 32 107 150
293 309 31 106 146
285 301 30 105 142
277 292 29 104 138
269 284 28 104 135
262 276 27 103 131
255 269 25 102 25
248 261 24 101 121
241 253 23 100 119
235 247 22 99 117
229 241 21 98 113
223 234 -- 97 110
217 228 -- 96 107
212 222 -- 95 102
207 218 -- 95 100
202 212 -- 94 98
197 207 -- 93 96
192 202 -- 92 94
187 196 -- 91 90
183 192 -- 90 89
179 188 -- 89 87
174 182 -- 88 84
170 178 -- 87 82
166 175 -- 86 80
163 171 -- 85 78
159 167 -- 84 77
156 163 -- 83 76
153 160 -- 82 75
149 156 -- 81 74
146 153 -- 80 72
143 150 -- 79 71
140 147 -- 78 70
137 143 -- 76 67
134 140 -- 75 66
131 137 -- 74 65
128 134 -- 73 64
126 132 -- 72 63
124 129 -- 71 62
121 127 -- 70 60
118 124 -- 69 59
116 122 -- 68 58
114 119 -- 67 57
111 117 -- -- --