The following values apply to solution annealed material, unless otherwise stated.
Proof strength | Tensile strength | Elong. | Hardness | ||
---|---|---|---|---|---|
Rp0.2a | Rp1.0a | Rm | Ab | A2" | HRB |
MPa | MPa | MPa | % | % | |
≥220 | ≥250 | 550-750 | ≥40 | ≥40 | ≤90 |
Proof strength | Tensile strength | Elong | Hardness | ||
---|---|---|---|---|---|
Rp0.2a | Rp1.0a | Rm | Ab | A2" | HRB |
ksi | ksi | ksi | % | % | |
≥32 | ≥36 | 80-109 | ≥40 | ≥40 | ≤90 |
1 MPa = 1 N/mm2
a) Rp0.2 and Rp1.0 correspond to 0.2% offset and 1.0% offset yield strength, respectively.
b) Based on L0 = 5.65 √S0 where L0 is the original gauge length and S0 the original cross-sectional area.
Tube, pipe, plate and sheet with material thicknesses >20 mm (0.787") and bar with diameters >100 mm (3.937")
Proof strength | Tensile strength | Elong. | Hardness | ||
---|---|---|---|---|---|
Rp0.2a | Rp1.0a | Rm | Ab | A2" | HRB |
MPa | MPa | MPa | % | % | |
≥200 | ≥230 | 550-750 | ≥40 | ≥40 | ≤90 |
Proof strength | Tensile strength | Elong | Hardness | ||
---|---|---|---|---|---|
Rp0.2a | Rp1.0a | Rm | Ab | A2" | HRB |
ksi | ksi | ksi | % | % | |
≥29 | ≥33 | 80-109 | ≥40 | ≥40 | ≤90 |
Intended for oil and gas production
Proof strength | Tensile strength | Elong. | Hardness | |||
---|---|---|---|---|---|---|
Rp0.2a) | Rm | A2" | HRC | |||
MPa | ksi | MPa | ksi | % | ||
Alloy 28-110 | ≥760 | ≥110 | ≥795 | ≥115 | 11 | ≤35 |
Alloy 28-125 | ≥860 | ≥125 | ≥895 | ≥130 | 10 | ≤37 |
Due to its austenitic microstructure, Alloy 28 has very good impact strength, both at room temperature and at cryogenic temperatures.
Tests have demonstrated that the steel fulfils the requirements according to the European standards EN 13445-2 (UFPV-2) ( min. 60 J (44 ft-lb) at -270 oC (-455 oF)) and EN 10216-5 (min. 60 J (44 ft-lb) at -196 oC (-320oF)).
Due to embrittlement caused by precipitation of intermetallic phases, Alloy 28 should not be exposed to temperatures above 600 °C (1110 °F) for prolonged periods.
According to the ASME Boiler and Pressure Vessel Code Table 1B, Alloy 28 is acceptable to 600ºF (316ºC) for Section III construction and 850ºF (455ºC) for Section I (Code Case 1325-18) and Section VIII, Division 1 construction.
Tube, pipe, plate and sheet with material thicknesses <20 mm (0.787") and bar with diameters <100 mm (3.937")
Temperature | Proof strength | Tensile strength | |
---|---|---|---|
Rp0.2 | Rp1.0 | Rm | |
°C | MPa | MPa | MPa |
min | min | min | |
50 | 200 | 230 | 550 |
100 | 190 | 220 | 510 |
150 | 175 | 205 | 470 |
200 | 160 | 190 | 440 |
250 | 155 | 185 | 410 |
300 | 150 | 180 | 390 |
350 | 145 | 175 | 380 |
400 | 135 | 165 | 370 |
450 | 125 | 155 | 360 |
500 | 120 | 150 | 350 |
550 | 115 | 145 | 340 |
Temperature | Proof strength | Tensile strength | |
---|---|---|---|
Rp0.2 | Rp1.0 | Rm | |
°F | ksi | ksi | ksi |
min | min | min | |
120 | 29 | 33 | 80 |
210 | 28 | 32 | 74 |
300 | 25 | 30 | 68 |
390 | 23 | 28 | 64 |
480 | 22 | 27 | 59 |
570 | 22 | 26 | 57 |
660 | 21 | 25 | 55 |
750 | 20 | 24 | 54 |
840 | 18 | 22 | 52 |
930 | 17 | 22 | 51 |
1020 | 17 | 21 | 49 |
Tube, pipe, plate and sheet with material thicknesses >20 mm (0.787") and bar with diameters >100 mm (3.937")
Temperature | Proof strength | Tensile strength | |
---|---|---|---|
Rp0.2 | Rp1.0 | Rm | |
°C | MPa | MPa | MPa |
min | min | min | |
50 | 180 | 205 | 550 |
100 | 160 | 190 | 510 |
150 | 150 | 180 | 470 |
200 | 140 | 170 | 440 |
250 | 130 | 160 | 410 |
300 | 120 | 150 | 390 |
350 | 115 | 140 | 380 |
400 | 110 | 135 | 370 |
450 | 105 | 130 | 360 |
500 | 100 | 125 | 350 |
550 | 95 | 120 | 340 |
Temperature | Proof strength | Tensile strength | |
---|---|---|---|
Rp0.2 | Rp1.0 | Rm | |
°F | ksi | ksi | ksi |
min | min | min | |
120 | 26 | 30 | 80 |
210 | 23 | 28 | 74 |
300 | 22 | 26 | 68 |
390 | 20 | 25 | 64 |
480 | 19 | 23 | 59 |
570 | 17 | 22 | 57 |
660 | 17 | 20 | 55 |
750 | 16 | 20 | 54 |
840 | 15 | 19 | 52 |
930 | 15 | 18 | 51 |
1020 | 14 | 17 | 49 |
Temperature | Creep rupture strength | |
---|---|---|
10 000 h | 100 000 h | |
°C | MPa | MPa |
approx. | approx. | |
550 | 262 | 193 |
600 | 186 | 146 |
650 | 122 | 93 |
700 | 82 | 62 |
Temperature | Creep rupture strength | |
---|---|---|
10 000 h | 100 000 h | |
°F | ksi | ksi |
approx. | approx. | |
1020 | 38 | 28 |
1110 | 27 | 21 |
1200 | 18 | 13 |
1300 | 12 | 9 |
Datasheet updated 2015-02-16 10:39:36 (supersedes all previous editions)
Alloy 28 is a high-alloy multi-purpose austenitic stainless steel for service in highly corrosive conditions. The grade is characterized by:
Product standards
Seamless tube and pipe: | ASTM B 668; EN 10216-5; SEW 400 (Feb 1991); SS 14 25 84; NFA 49-217 |
Plate, sheet and strip: | ASTM B 709, EN 10088-2; SS 14 25 84 |
Bar steel: | EN 10088-3; SS 14 25 84 |
Fittings: | ASTM A 403 (chemical composition and mechanical properties according to ASTM B668) |
Approvals
• | Central/South America | • | North America |
• | Asia |
• | Mid East/Africa |
• | Western Europe |
• | Australasia |
• | Eastern Europe |
• | UAE |
• | Sri Lanka | • | Bahrain |
• | Russia | • | Egypt |
• | Portugal | • | Turkey |
• | Spain | • | Singapore |
• | Brazil | • | Thailand |
• | Chile | • | Malaysia |
• | Venezuela | • | Indonesia |
• | Costa Rica | • | Poland |
• | USA, U.A.E | • | Italy |
• | Oman | • | Canada |
• | Saudi Arabia | • | Angola |
• | Qatar |