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Gerdau MACSTEEL® Quick Facts
Bar Size and Length Range
HR SBQ Carbon & Alloy Bars Semi-Finished Bar Size Ranges
| Rounds: | 61Ľ8”–91/4” (156 mm to 235 mm) |
| Lengths: | 12 through 32 feet |
Direct Rolled Bar Size Range
| Rounds: | 1”–61Ľ16” (25 mm–155 mm) |
| Lengths: | 15 through 40 feet |
MACGOLD® Precision Hot Rolled Bars
| Rounds: | 1”–5” (25 mm–127 mm) |
| Lengths: | 15 through 40 feet |
MACPLUS® Cold Finished Steel Bars
| Rounds: | 0.875” to 5” (22 mm to 127 mm) |
| Lengths: | 10 through 32 feet |
Quality
Hot Rolled Bars
| Decarburization: | .008” (0.2 mm) Maximum |
| Seam Depth: | SEAM-FREE® |
| Size Tolerance: | 50% AISI & ASTM A29 Tolerance |
| Macro ASTM E381: | S1-R1-C2 |
| Micro ASTM E45: | A295, A485, A534 and A866 |
MACGOLD® Precision Hot Rolled Bars
| Size Tolerance: | 55–75% better than AISI & ASTM A29 Tolerances |
| Decarburization: | .006” (0.15 mm) Maximum |
| Seam Depth: | SEAM-FREE® |
MACPLUS® Cold Finished Steel Bars
| Size Tolerance: | Cold finished tolerance (see page 148) |
| Decarburization: | DECARB-FREE |
| Seam Depth: | DEFECT-FREE |
Inquiries and Orders
Telephone 1-800-876-7833. When inquiring about or ordering Gerdau MACSTEEL bars, please have the following information in as much detail as possible. Sufficient information will better enable Gerdau MACSTEEL to meet your requirements to your complete satisfaction.
- Steel Grade Specification.
- Size.
- Tonnage Required.
- Delivery Requirements.
- Specific End Use.
- Your Production Processes.
- Any Other Information that May Be Useful in Supplying the Most Suitable Product.
Heat Treatments for Steel Bars
Heat treating broadens the spectrum of properties within steel bars. The heat treatment of bars can be performed to improve machinability, increase toughness, improve cold forming characteristics, alter hardness and tensile strength up or down dependent on the desired characteristic and to relieve residual stress as well as improving shearability. At Gerdau MACSTEEL, heat treating of our bars includes:
Annealing
Softens the steel and makes it more workable for shearing, forming and machining.
Normalizing
Refines the internal structure of hot rolled bars. The process gives the bars uniform mechanical properties, better ductility and greater impact loading resistance.
Lamellar Pearlitic Anneal
A heat treatment to optimize the microstructure for machining.
Spheroidize Annealing
Changes the carbide microstructure into globular shapes. This annealing process improves machinability and cold forming of the bars.
Thermal Stress Relieving
Removes residual stresses within the steel, restoring mechanical properties and preventing distortion.
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