our products
Due to the ever-demanding needs of the energy industry, we provide high quality products per our customer’s specification requirements.
25CR / 28CR
25CR/ Superduplex Stainless Steel – Superduplex steel is a high-alloy stainless steel known for its excellent corrosion resistance, high strength, and durability, particularly in harsh environments such as offshore OCTG and completion equipment applications. It combines the benefits of austenitic and ferritic stainless steels, offering superior resistance to stress corrosion cracking and pitting.
28CR/ Alloy 28 – Alloy 28 is a highly corrosion-resistant austenitic stainless steel designed for use in aggressive environments containing acids, chlorides, and seawater. It offers excellent resistance to stress corrosion cracking and localized corrosion, making it ideal for chemical processing and oil and gas applications.
product details
GRADES
GRADES
25CR-80 KSI, 110 KSI, 125 KSI
28CR-110 KSI, 125 KSI
SIZES
SIZES FOR BOTH
- OCTG sizes from 3-1/2” to 9-5/8” OD with API standard wall thicknesses
- Mechanical Tubes/ Coupling stocks
- Standard coupling stocks as required for OCTG tubes
- Mechanical tube wall thickness restriction-
- 25CR → Maximum 2” (Commonly available upto 1.5” wall thickness)
- 28Cr → Maximum 1.375” (Commonly available upto 1.15” wall thickness)
- Bars only available for 25Cr in solution annealed condition at 80 KSI
CHEMICAL AND MECHANICAL COMPOSITION
Chemical Composition
| 25CR Chemistry |
C | Cr | Ni | Mn | Si | Mo | N | Cu | W | P | S | PREN | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UNS S31260 | Min Max |
– 0.03 | 24 26 |
5.5 7.5 |
– 1 |
– 0.75 |
2.5 3.5 |
0.1 0.3 |
0.2 0.8 |
0.1 0.5 |
– 0.03 |
– 0.03 |
40 – |
| UNS S32550 | Min Max |
– 0.04 |
24 27 |
4.5 6.5 |
– 1.5 |
– 1 |
2 4 |
0.1 0.25 |
1.5 2.5 |
– – |
– 0.04 |
– 0.3 |
40 – |
| UNS S32760 | Min Max |
– 0.03 |
24 26 |
6 8 |
– 1 |
– 1 |
3 4 |
0.2 0.3 |
0.5 1 |
0.5 1 |
– 0.03 |
– 0.01 |
40 – |
| UNS S39274 | Min Max |
– 0.03 |
24 26 |
6 8 |
– 1 |
– 0.8 |
2.5 3.5 |
0.24 0.32 |
0.2 0.8 |
1.5 2.5 |
– 0.03 |
– 0.02 |
40 – |
| UNS S39277 | Min Max |
– 0.03 |
24 26 |
6.5 8 |
– – |
– 0.8 |
3 4 |
0.23 0.33 |
1.2 2 |
0.8 1.2 |
– 0.025 |
– 0.002 |
40 – |
Mechanical Properties
| min | Max | MPA min | Max | ||
|---|---|---|---|---|---|
| Mechanicals 110 |
Tensile Yield Hardness Elongation |
125,000 110,000 – 10% |
– 140,000 36 HRC – |
– – – – |
– – – – |
| Mechanicals 125 |
Tensile Yield Hardness Elongation |
130,000 125,000 – 10% |
– 150,000 37 HRC – |
– – – – |
– – – – |
Chemical Composition
| 28CR Chemistry |
C | Cr | Ni | Mn | Si | Mo | N | Cu | W | P | S | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UNS S31260 |
Min Max |
– 0.03 | 26 28 |
29.5 32.5 |
– 2.5 |
– 1 |
3 4 |
– – |
0.6 1.4 |
– – |
– 0.03 |
– 0.03 |
Mechanical Properties
| min | Max | MPA min | Max | ||
|---|---|---|---|---|---|
| Mechanicals 110 |
Tensile Yield Hardness Elongation |
115,000 110,000 – 11% |
– 140,000 35 HRC – |
– – – – |
– – – – |
| Mechanicals 125 |
Tensile Yield Hardness Elongation |
130,000 125,000 – 10% |
– 150,000 37 HRC – |
– – – – |
– – – – |