ZERON® 100 is a highly alloyed super duplex stainless steel for use in aggressive environments. The combination of properties makes ZERON® 100 the optimum choice in a range of industries. ZERON® 100 is highly resistant to corrosion in a wide range of organic and inorganic acids. The copper content gives excellent resistance to corrosion in many non-oxidizing acids. This alloy is also highly resistant to strong alkalis. ZERON® 100 is not recommended for uses which involve extended exposure to temperatures greater than 300°C (572°F) as there is a substantial reduction in toughness.
Grade 660 Bolts
ASTM A453 Grade 660 covers four grades of bolting materials Classes A, B, C, and D for use in High Strength, Heat Resistance Steel
service such as 660 bolts for pressure vessel and flanges.
Sigma custom manufaters 660 bolting in Hex bolts, hex nuts, screws, washers, studs, and stud bolts.
ASTM L7M Custom Bolts
ASTM A320 Grade L7M bolting is designned for low temperature sour gas service where there is high concertration of Hydrogen Sulfide gases present in prodcution situation. Per the specification at Sigma Fasteners we have our own heat treating furnace and hardness testing equipmet for onsite L7M modification and hardness testing. All L7M bolts require 100% hardness testing and at Sigma we keep it in house for complete control over the quality your products demand.
ASTM B7M Custom Bolts
ASTM A193 Grade B7M bolting is designned for sour gas service where there is high concertration of Hydrogen Sulfide gases present in prodcution situation. Per the specification at Sigma Fasteners we have our own heat treating furnace and hardness testing equipmet for onsite B7M modification and hardness testing. All B7M bolts require 100% hardness testing and at Sigma we keep it in house for complete control over the quality your products demand.
Socket Head Cap Screws
Standard and custom manufactured socket head cap screws.
Standard Socket Head Cap Screws
Sigma distributes quality fasteners – socket head cap screws, metric socket screws, flat head socket screws or button head socket screws. Also known as Allen head cap screws.
Custom and Modified Socket Head Cap Screws
If you specification requires a modified or custom socket head cap screw Sigma will deliver.
ASTM Material Selection Chart B7, B7M, L7, L7M, 660, 718 Inconel, 17-4 ph, MP35N
Available coated, plated and plain.
Heavy Hex Bolts
Heavy Hex Bolts
There are several ASTM bolting specifications that require a heavy hex head – larger than a standard or finished hex head. These specifications include: A193, A320 and A307B. Although A325 and A490 bolts also require a heavy hex head, they refer to Structural Bolts for dimensional specifications, since structural bolts have shorter thread lengths than standard heavy hex bolts.
Heavy Hex Bolts are used in a varity of OEM equipment and can be manufactured in multiple ASTM grades.
Check Out Heavy Hex Bolts our Bolt Catalog for Sizes and Dimensions.