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 Click to enlarge image
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| * Specifications |
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Carbon Steel for Machine Structural Use |
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AISI 1010, 1015, 1018, 1020 1022 1025 1045 1050 |
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JIS G 4051 S10C, S15C, S20C,S22C, S25C, S45C,S50C |
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BS 970 Part 1/3, 040A10, 070M20/C22, C25, C45, C50 |
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Australia/N.Z. AS3679 250/300 |
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Chromium Molybdenum Steels |
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AISI 4131, 4135, 4140,ASTM A 193 B7(*) |
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JIS G 4105 SCM 415, SCM435, SCM440 |
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BS 708M20, 34CrMo4, 708M40 |
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Spring Steels |
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AISI 9260/5155/6150/9254 |
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JIS G 4801 SUP7/9/10/12, BS 735A51, 685A57, DIN 55Cr3, 50CrV4, 54SiCr6 |
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| * Characteristics |
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Hot Rolled ( Forged ) Steel Round Bar |
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Smooth Turned Round Bar |
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| * Dimensions |
| Dia.(mm) |
Length(M) |
Dia Tolerance |
Straightness |
Shape |
| 12-530 |
3.0-8.0 |
1.5% of dia. |
3/1,000 |
Round, Hexagon, |
| Square & Flat |
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* Tolerances of Hot Rolled Round Bar and Square Bar |
| Item |
Dimensional Tolerance |
| Tolerances on
diameter or width across flats |
±1.5% with the minimum value of 0.4mm |
| Deviation of
diameteror deviation |
Not
exceeding 70% of range of tolerance on diameter or width across flats |
| Tolerances
on length |
For length not
exceeding 7m |
+40mm
-0mm |
| For length
exceeding7m |
Add 5mm to
plus side tolerance for every increase of 1m or its fraction |
| Radius on corners(R) |
10 to 20% of width across flats, as a rule |
| Twist |
To be practically straight |
| Bend |
Not exceeding 3mm for every 1m and not exceeding 3mm X
length(m)/1m for total length |
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