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Material | Specification | Standards | Size | Length |
ASTM A193 B8 CL4 Bolt
| IS BS ASTM | DIN, ISO, JIS, GB, IS, BS, ASTM | M 02 to M 160 | 3 mm to 200 mm |
| Grade | Size | Tensile ksi, min | Yield, ksi, min | Elong, %, min | RA % min |
| B8 CL4 | 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 | |
| B8 CL4 Class 1 | All | 75 | 30 | 30 | 50 |
| B8M CL4 Class 1 | All | 75 | 30 | 30 | 50 |
| B8 CL4 Class 2 | Up to 3/4 | 125 | 100 | 12 | 35 |
| 7/8 – 1 | 115 | 80 | 15 | 35 | |
| 1-1/8 – 1-1/4 | 105 | 65 | 20 | 35 | |
| 1-3/8 – 1-1/2 | 100 | 50 | 28 | 45 | |
| B8M CL4 Class 2 | Up to 3/4 | 110 | 95 | 15 | 45 |
| 7/8 – 1 | 100 | 80 | 20 | 45 | |
| 1-1/8 – 1-1/4 | 95 | 65 | 25 | 45 | |
| 1-3/8 – 1-1/2 | 90 | 50 | 30 | 45 |
| Element | B8 CL4 | B8 CL4 | B8M CL4 |
| Carbon | 0.37 – 0.49% | 0.08% max | 0.08% max |
| Manganese | 0.65 – 1.10% | 2.00% max | 2.00% max |
| Phosphorus, max | 0.035% | 0.045% | 0.045% |
| Sulfur, max | 0.040% | 0.030% | 0.030% |
| Silicon | 0.15 – 0.35% | 1.00% max | 1.00% max |
| Chromium | 0.75 – 1.20% | 18.0 – 20.0% | 16.0 – 18.0% |
| Nickel | 8.0 – 11.0% | 10.0 – 14.0% | |
| Molybdenum | 0.15 – 0.25% | 2.00 – 3.00% |
At Sumakhsteel, we take great pride in being the largest supplier and manufacturer in the USA, delivering advanced solutions for every one of your piping requirements. Backed by modern production facilities strategically situated across the USA, we maintain an extensive inventory of more than 25,000 tons of top-grade materials kept ready in stock.
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We supply these ASTM A193 B8 CL4 Bolts in accordance with DIN, ISO, JIS or ANSI Standard.
High Temperature Resistance: These bolts are manufactured from AISI 347 stainless steel, which delivers outstanding resistance to elevated temperatures, reaching up to 800-900°C (1472-1652°F) in continuous operation.
Corrosion Resistance: AISI 347 stainless steel offers strong corrosion resistance, particularly in settings where oxidation and scaling pose challenges. This makes B8 CL4 bolts appropriate for use in mildly corrosive conditions.
Mechanical Properties: ASTM A193 B8 CL4 bolts feature solid mechanical properties, such as tensile strength and yield strength, which guarantee reliability and durability under challenging conditions.
Weldability: AISI 347 stainless steel can be easily welded with standard welding methods, which enhances its adaptability during manufacturing and assembly operations.
Standard Compliance: As part of the ASTM A193 standard, B8 CL4 bolts guarantee adherence to industry standards, which is essential for applications demanding particular material properties and performance characteristics.
ASTM A193 B8 CL4 Bolts serve a wide range of uses, as varied as the sectors that rely on them, led chiefly by the aerospace, railway, construction and automotive sectors, along with petrochemical, nuclear, medical, Oil & Gas, Chemical, Pharmaceutical, Food & Beverage, Nuclear, Thermal Power plants, Paper and Pulp, marine and mining, etc.
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