Round Bars
ASTM A193 Grade B7 Round Bars
Boltport Fasteners is a stockist and supplier of ASTM A193 Grade B7 Round Bars in India. Boltport can offer heat treated chamfered or plain end b7 round bars in metric and imperial sizes. B7 round bars can be supplied in fix or random lengths as per customer's request. We can also control size for a193 grade b7 round bars as per required tolerance. These round bars can be directly cut to sizes and roll threaded for final stud bolts specifics.
Find information on ASTM A193 Grade B7 chemical composition, mechanical properties such as tensile strength, yield strength, hardness, bolting products, surface coatings, and dimension standards.
For a quick quote on A193 Grade B7 Round Bars, please contact our sales team at estimation@ferrobend.com
ASTM A193 Grade B7 Chemical Composition
| Elements | Range | Product Variation, Over or Under B |
|---|---|---|
| Carbon | 0.37-0.49 % D | 0.02 % |
| Manganese, max | 0.65-1.10 % | 0.04 % |
| Phosphorus, max | 0.035 % | 0.005 % over |
| Sulfur, max | 0.040 % | 0.005 % over |
| Silicon | 0.15 - 0.35 % | 0.02 % |
| Chromium | 0.75-1.20 % | 0.05 % |
| Molybdenum | 0.15-0.25 % | 0.02 % |
B Product analysis - Individual determinations sometimes vary from the specified limits on ranges as shown in the tables. The several determinations of any individual element in a heat may not vary both above and below the specified range.
D For bar sizes over 31/2 in. [90 mm], inclusive, the carbon content may be 0.50 %, max. For the B7M grade, a minimum carbon content of 0.28 % is permitted, provided that the required tensile properties are met in the section sizes involved; the use of AISI 4130 or 4130H is allowed.
ASTM A193 Grade B7 Mechanical Properties - Metric Sizes
| Diameter mm | Min Tempering Temperature, °C | Tensile Strength min, MPa | Yield strength, min, 0.2% offset, MPa | Elongation in 4D min, % | Reduction of Area, min, % | Hardness, max |
|---|---|---|---|---|---|---|
| M64 and Under | 593 | 860 | 720 | 16 | 50 | 321 HBW or 35 HRC |
| over M64 to M100 | 593 | 795 | 655 | 16 | 50 | 321 HBW or 35 HRC |
| over M100 to M180 | 593 | 690 | 515 | 18 | 50 | 321 HBW or 35 HRC |
ASTM A193 Grade B7 Mechanical Properties - Inch Sizes
| Diameter Inch | Min Tempering Temperature, °C | Tensile Strength min, ksi | Yield strength, min, 0.2% offset, ksi | Elongation in 4D min, % | Reduction of Area, min, % | Hardness, max |
|---|---|---|---|---|---|---|
| 2.5 and under | 1100 | 125 | 105 | 16 | 50 | 321 HBW or 35 HRC |
| over 2.5 to 4 | 1100 | 115 | 95 | 16 | 50 | 321 HBW or 35 HRC |
| over 4 to 7 | 1100 | 100 | 75 | 18 | 50 | 321 HBW or 35 HRC |
