Duplex stainless steel fasteners S32760 Zeron 100 threaded rod

1.Why stud is used instead of bolts?

Studs provide the ability to obtain much more accurate torque values because the studs don't twist during tightening as do bolts. Because the studs remain stationary during nut tightening, the studs stretch in one axis alone, providing much more even and accurate clamping forces

2. Zeron 100 thread rod material introduction

ZERON^® 100 (F55 Duplex / 25Cr Duplex) is a super duplex stainless steel for use in aggressive environments.

Its properties include:

Resistant to pitting and crevice corrosion in warm seawater with a guaranteed corrosion performance (PREN > 40)

Lower more stable price compared to nickel based alloys

Excellent resistance to stress corrosion cracking in both chloride and sour environments

Superior resistance to sulfuric acid at most concentrations

Improved resistance over austenitic stainless to erosion corrosion and corrosion fatigue

High Strength (80,000 psi minimum Yield Strength) permitting designs to reduce weight versus other corrosion resistant alloys

Readily weldable using ZERON 100 filler metal

Specifications

ASTM A 182, ASTM A 182 (Grade F55), ASTM A 240, ASTM A 276, ASTM A 314, ASTM A 473, ASTM A 479, ASTM A 790, ASTM A 815, NORSOK MDS 055, UNS S32760, W. Nr./EN 1.4501, Werkstoff 1.4501

Physical Properties

Density:0.283lb/in³Roisson’s Ratio:0.32 Melting Range: 2510-2650℉ Electial Resistivity at 68℉ 0.851 10-6 ohm • m

3. The thread rolling definiation

Thread rolling is a cold metal forging process that forms threads into the mirror image of a roller die. This

process is different from metal cutting, grinding, and chasing because it does not remove any metal to

create the desired profile. Instead, thread rolling uses hardened steel dies to displace and mold ductile

metals.

The tooth form of the hardened steel dies protrudes into the outside diameter of plain cylindrical blanks

to reform the surface. The extreme pressure from the dies causes the blank material to displace radially

outward into the crests of the thread pattern, thus producing a part with a thread mirroring that of the

die.

4.The difference between DIN975 and DIN976 for S32760 thread rod