Stud Bolts Manufacturer & Supplier | Astm A193 B7 & Asme B18.31.2 | Akbarali Enterprises

Material & Grades Table – Stud Bolts

Material	Grade / Standard	Size / Thickness / Diameter	Extra Specification	Weight (kg/1000 pcs)
Alloy Steel	ASTM A193 Grade B7	M8–M48 × 30–300 mm	High-temperature and pressure applications	Approx. 10–1500
Alloy Steel	ASTM A193 Grade B16	M10–M48 × 30–300 mm	High-strength elevated-temperature service	Approx. 12–1500
Alloy Steel	ASTM A320 Grade L7	M10–M48 × 30–300 mm	Low-temperature pressure applications	Approx. 12–1500
Stainless Steel	ASTM A193 Grade B8 Class 1	M8–M48 × 30–300 mm	Austenitic corrosion-resistant stud	Approx. 10–1500
Stainless Steel	ASTM A193 Grade B8M Class 1	M8–M48 × 30–300 mm	SS 316 corrosion-resistant stud	Approx. 10–1500
Stainless Steel	SS 304 / ASTM F593	M6–M36 × 25–300 mm	General industrial corrosion resistance	Approx. 8–900
Stainless Steel	SS 316 / ASTM F593	M6–M36 × 25–300 mm	Marine and chemical environments	Approx. 8–900
Nickel Alloy	Inconel 625 / ASTM B446	M8–M36 × 30–300 mm	High-temperature and severe corrosion service	Approx. 15–1000

Stud bolts are externally threaded nuts which are applied when it comes to flanges connections and clamping is necessary to be done with security and uniformity. They are threaded at both ends or their full length unlike the normal bolts, and nuts can be fitted to both sides to distribute the load more. The design of them is very effective in high pressure and high temperature conditions and it provides tight and leak free joints. Applications Studies bolts are commonly used in oil and gas pipeline, petrochemicals, refinery, and power generation systems where robust and dependable fastening is significant in the safety and operation of systems.

Key Features & Advantages

• Fully threaded design provides extensive nut engagement
• Suitable for high-pressure and high-temperature connections
• High tensile strength and reliable clamping performance
• Excellent dimensional accuracy and thread consistency
• Stainless steel grades provide excellent corrosion resistance
• Available in multiple grades and customized dimensions
• Suitable for flanges, valves, pressure vessels, piping, and machinery

Chemical Composition

Representative Grade: ASTM A193 Grade B7

Element	Percentage (%)
Carbon (C)	0.37 max.
Manganese (Mn)	0.65–1.10
Chromium (Cr)	0.75–1.20
Molybdenum (Mo)	0.15–0.25
Phosphorus (P)	0.035 max.
Sulfur (S)	0.040 max.
Iron (Fe)	Balance

Mechanical Properties

Property	Value
Tensile Strength	860 MPa min.
Yield Strength	720 MPa min.
Elongation	16% min.
Hardness	35 HRC max.

Equivalent Grade

Standard	Grade
ASTM	A193 Grade B7
UNS	G41400
EN	42CrMo4
DIN	1.7225