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Boltport Fasteners offers a wide range of ASTM A193 Grade B7 Bolts, which provides resistance to sensitization during welding and other thermal processes. The austenitic class of these ASTM A193 Grade B7 Stainless Steel Bolts is generally considered to be weldable by the common fusion and resistance techniques. The acid concentration of our ASME SA 193 Grade B7 Alloy Steel Bolts has a marked influence on the rate of attack in such environments and should be carefully determined by service tests. These ASTM A193 Grade B7 Bolts is readily welded by a full range of conventional welding procedures (except oxyacetylene).
| Threads Configuration : | ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads |
| Thread Diameters : | Up to 2-1/2 |
| ASTM A193 B7 : | Alloy steel, AISI 4140/4142 quenched and tempered |
| Grade | Description | Diameter | Tensile Strength, min. | Yield Strength, min. | Hardness, max. | Marking |
| ASTM A193 B7 | Chromium-Molybdenum | 2 1/2” and under | 125 | 105 | 321 HB or 35 HRC | B7 |
| over 2 1/2” to 4” | 115 | 95 | 321 HB or 35 HRC | |||
| over 4” to 7” | 100 | 75 | 321 HB or 35 HRC |
| Grade | C | Mn | Si | P | S | Ni | Cr | Mo |
| B7 (AISI 4140) | 0.37 - 0.49% | 0.65 - 1.10% | 0.15 - 0.35% | 0.035% | 0.040% | - | 0.75 - 1.20% | 0.15 - 0.25% |
| Grade | Size | Tensile ksi, min | Yield, ksi, min | Elong, %, min | RA % min |
| B7 | Up to 2-1/2 | 125 | 105 | 16 | 50 |
| 2-5/8 - 4 | 115 | 95 | 16 | 50 | |
| 4-1/8 - 7 | 100 | 75 | 18 | 50 |
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Our ASME SA 193 Grade B7 Hex Bolts are filler metal or austenitic, low carbon filler metals with molybdenum content, or a nickel - base filler metal by means of sufficient chromium and molybdenum content to exceed the corrosion resistance. These ASTM A193 Grade B7 SS Bolts is utilized for ease of fabrication, which is in addition a high carbon modification developed for enhanced creep resistance. Our offered ASME SA 193 Grade B7 Bolts are used in under similar service conditions in heat transfer process equipment like boilers, super heaters, heat exchangers and condensers. Timeliness is for all the time maintained in all our deliveries of these ASTM A193 Grade B7 Alloy Steel Bolts therefore we have created a wide distribution network, enabling us to reach a number of parts in the effective manner.
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