Hem Industries
Hem Industries
UNS S32750 & UNS 32760 (Super Duplex Fasteners) Details & Specifications
- Material to UNS S32750 and UNS S32760 is described as a super duplex stainless steel with a microstructure of 50:50 austenite and ferrite.
- The High Chromium and Molybdenum content of Super Duplex Bolts and Nut make it extremely resistant to uniform corrosion by organic acids like formic and acetic acid.
- UNS S32750 and UNS S32760 Fasteners offers high resistance to crevice corrosion and stress corrosion cracking.
- In dilute sulfuric acid contaminated with chloride ions, UNS 32750 Stud bolts and UNS S32760 Bolts and Nut has better corrosion resistance than 904L Fasteners, which is a highly alloyed austenitic steel grade specially designed to resist pure sulfuric acid.
Superduplex S32750
| Chemical Composition | C | Mn | Si | Cr | Ni | Mo | P | S | N | Fe | Cu |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | 24 | 6 | 3 | 0.24 | Balance | ||||||
| Max | 0.03 | 1.20 | 0.8 | 26 | 8 | 5 | 0.035 | 0.02 | 0.32 | Balance | 0.5 |
Superduplex S32760
| Chemical Composition | C | Mn | Si | Cr | Ni | Mo | P | S | N | Fe | Cu | W |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | 24 | 6 | 3 | 0.20 | Balance | 0.5 | 0.5 | |||||
| Max | 0.03 | 1 | 1 | 26 | 8 | 4 | 0.03 | 0.01 | 0.30 | Balance | 1 | 1 |
PREN For UNS S32760
%Cr +3.3 x %Moly + 16 x %N >= 40 min
Standards ISO 15056 / NACE MR0175 and BS 4515-2 a different PREN formula including tungsten is used.
PREN = %Cr+(3.3%Mo)+(0.5%W)+(16%N).
Result to be > 41.0
Superduplex Mechanical Properties
| Mechanical Properties | Tensile Strength | Yield Strength | Elongation | Reduction | Hardness | |||
|---|---|---|---|---|---|---|---|---|
| Min Ksi ( MPa ) | Min Ksi | Min% | Area Min % | Max ( BNH ) | ||||
| 32750 | ASTM A182 / ASTM A 276 | 116 | (800) | 80 | (550) | 15 | - | 310 |
| 32760 | ASTM A182 | 109-130 | (750-895) | 80 | (550) | 25 | 45 | - |
| 32750 | ASTM A479 ( >2) | 116 | (800) | 80 | (550) | 15 | - | 297 |
| 32750 | ASTM A479( <2) | 110 | (760) | 75 | (515) | 15 | - | 310 |
| 32760 | ASTM A 276 Condition A | 109 | (750) | 80 | (550) | 25 | 290 | |
| 32760 | ASTM A 276 Condition S | 125 | (860) | 105 | (720) | 16 | 335 | |
Superduplex S32760
Superduplex S32760
PREN For UNS S32760
%Cr +3.3 x %Moly + 16 x %N >= 40 min
Standards ISO 15056 / NACE MR0175 and BS 4515-2 a different PREN formula including tungsten is used.
PREN = %Cr+(3.3%Mo)+(0.5%W)+(16%N).
Result to be > 41.0
Superduplex Mechanical Properties
Characteristics
EN 10088-3
1.4410 / 1.4501
X2CrNiMoN25-7-4 / X2CrNiMoCuWN25-7-4
UNS S32750 / UNS S32760
ASTM A182-F53, F55
ASTM A276
ASTM A479
NORSOK MDS D51 to D55 D57 and D58
NACE MR01-75 (latest revision) / ISO 15156
Note :- ASTM A182 and ASTM A479 are common standard referred for Fasteners for Super Duplex Steel Fasteners.
Super Duplex Steel Fasteners Manufactured by Hem Industries
- Super Duplex Threaded Bar
- Super Duplex Stud Bolt
- Super Duplex Double End Stud Bolt
- Super Duplex Head Hex Bolt
- Super Duplex Head Hex Screws
- Super Duplex Head Hex Nut and Duplex Heavy Hex Nut
- Super Duplex Foundation Bolt
- Super Duplex Plain Washer
- Super Duplex Spring Washer
- Super Duplex Bar
Sizes Manufactured by Hem Industries
Imperial Series: 5/16 Inch upon 4 Inch Diameter
Metric Series: M6 upto M100
Dimension Standards
IS: Indian Standard
ASTM: American Standard
DIN: German Standard
ISO: European Standard
JIS: Japanese Standard
Raw Material Origin for Super Duplex Fasteners Alloy 2205 and Alloy 31803 will be from Indian Mill, USA Mill, European Mill, Japanese Mill and Korean Mill