We are a professional manufacturer of A193 B7 Hex bolt with Xylan 1070 PTFE coating in China
A193 B7 hex bolts, studs, and A194 2H heavy hex nuts. A193 B7 hex bolts are offered in diameters from 5/16” to 1-3/4”.
ASTM A193 Grade B7 heavy hex head bolts are high strength fasteners manufactured from heat treated alloy steel AISI 4140/4142, quenched and tempered. Dimensional specifications according to ASME B18. 2.1. Grade markings consists of both the grade symbol “B7” and the manufacturer’s identification mark.
Mechanical properties A193 B7 Hexx bolt
ASTM A193 Grade B7 Hex bolts are manufactured from a chromium-molybdenum steel and are quenched and tempered (heat treated) to develop the desired mechanical properties (strength). Grade B7 is the most commonly used grade of A193 Hex bolts in construction. B7 Hex bolts are available on the market. Grade B7 bolts are often used in pipe flange connections. These bolts are usually purchased and sold in bare metal, but are often hot-dipped galvanized, zinc-plated, Xylan-coated, PTFE-coated or otherwise coated for corrosion resistance.
ASTM A193 Grade B7 Heavy Hex Bolts are generally used in high pressure / temperature applications for steel pipe flanges and flanged fittings. They are usually mated with ASTM A194 Grade 2H Heavy Structural Hex Nuts when required
COATING OPERATING ON THE ASTM A193 B7 HEX BOLTS
- Cadmium Electroplating
– High Service Temp: 608o F.
– Low Service Temp: N/A; solid below 607o F. - Zinc or Zinc-Nickel Electroplating
– High Service Temp: 788o F.
– Low Service Temp: N/A; solid below 788o F. - Hot Dip Galvanizing
– High Service Temp 800o F.
– Low Service Temp: N/A; solid below 800o - DuPont Teflon® 857G Series PTFE
– High Service Temp: 500o F.
– Low Service Temp: N/A - Xylan® 1400 Series PTFE
– High Service Temp: 450o F. continuous, 550o F. intermittent
– Low Service Temp: -320o F. - Xylar 2® Cermet
– High Service Temp: up to 1,000o F.
– Low Service Temp: N/A - Zinc Phosphate
– Ambient Temperature