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Overview
Specifications
ASTM A193 B8M
ASTM A193 B8M is a high-strength stainless steel bolting specification manufactured from AISI 316 stainless steel. Containing 2.0% to 3.0% molybdenum, B8M delivers superior resistance to pitting and crevice corrosion compared to standard B8 (304), especially in coastal marine atmospheres, chemical processing plants, and wastewater treatment infrastructure.
Domestic ASTM A193 B8M Bolts & Fasteners Manufacturing
Atlanta Rod & Manufacturing is an American producer of ASTM A193 bolts specializing in stainless steel grade B8M domestic heading and threading. Fabricated in Lavonia, Georgia, our B8M bolting conforms to Build America, Buy America (BABA) Act and American Iron and Steel (AIS) provisions with certified domestic Mill Test Reports (MTRs).
Available in both Class 1 (carbide solution treated) and Class 2 (strain-hardened for elevated tensile strength), our B8M products include heavy hex bolts, finished domestic bolts, double-end studs, and continuous threaded rod. Mating with our domestic ASTM A194 Grade 8M heavy hex nuts, Atlanta Rod is your premier source to buy domestic stainless fasteners.
| Mechanical Properties (Class 1 vs Class 2) | Class 1 (All Diameters) | Class 2 (≤ 3/4”) | Class 2 (3/4” – 1”) | Class 2 (1” – 1-1/4”) |
|---|---|---|---|---|
| Tensile Strength, min (ksi) | 75 | 110 | 100 | 95 |
| Yield Strength, min (ksi) | 30 | 95 | 80 | 65 |
| Elongation in 2", min (%) | 30 | 15 | 20 | 25 |
| Reduction of Area, min (%) | 50 | 45 | 45 | 45 |
| Hardness (Rockwell max) | 90 HRB | 35 HRC | 35 HRC | 35 HRC |