The properties for forgings are typical values for section
thicknesses up to 11.81” (300mm) solid or 9.84” (250mm) in an annulus with a minimum
bore of 3.94” (100mm).
As the properties from forgings are very dependent upon the
product route and the actual forging ratio, then properties and design are by agreement
for other than standard items.
| Trade name | Eq. ASTM Specification | Condition | Tensile Strength, ksi | 0.2% Offset Yield Strength | Elongation in 2 in., % | Reduction of Area, % | Hardness, Brinell (Max) | Charpy Impact |
|---|---|---|---|---|---|---|---|---|
| Zeron 100 SA | ASTM A276/A 479 Cond.A | Solution Annealed | 109 | 80 | 25 | – | 290 | – |
| Zeron 100 SA | ASTM A1082 | Solution Annealed | 109 | 80 | 25 | 30 | 290 | – |
| Zeron 100 FG | ASTM A276 Cond.S | Solution Annealed+Strain Hardened | 125 | 105 | 16 | – | 335 | – |
| Zeron 100 FG | ASTM A193 Grade B7 | Solution Annealed+Strain Hardened | 125 | 105 | 16 | 50 | 321 | 40 Joules (29.5 ft. lbf) minimum at -46oC (-50oF) |
| Zeron 100 FLT | ASTM A320 Grade L7 | Solution Annealed+Strain Hardened | 125 | 105 | 16 | 50 | 321 | 27 Joules (20 ft. lbf) minimum at -101oC (-150oF) |
| Wrought (UNS S32760) | Cast (UNS J93380) | |
|---|---|---|
| Yield Strength (0.2% offset) | 80 ksi (550 MPa) | 65 ksi (450 MPa) |
| Tensile Strength | 109 ksi (750 MPa) | 101 ksi (700 MPa) |
| Elongation in 50mm | 25% | 25% |
| Hardness | 28 HRC Max | 24 HRC Max |
| Temp, °F (°C) |
Yield Strength, 0.2% offset ksi (MPa) |
Tensile Strength ksi (MPa) |
|---|---|---|
| 68 (20) | 80 (550) | 109 (750) |
| 122 (50) | 73 (500) | 105 (725) |
| 212 (100) | 68 (470) | 102 (700) |
| 302 (150) | 65 (450) | 99 (680) |
| 392 (200) | 62 (430) | 97 (670) |
| 482 (250) | 58 (400) | 94 (650) |
| 572 (300) | 56 (385) | 92 (635) |
| Temp, °C (°F) |
Yield Strength, 0.2% offset ksi (MPa) |
Tensile Strength ksi (MPa) |
|---|---|---|
| 68 (20) | 550 (80) 550 | 109 (750) |
| 122 (50) | 470 (68) 470 | 102 (700) |
| 212 (100) | 430 (62) 430 | 97 (670) |
| 302 (150) | 400 (58) 400 | 90 (620) |
| 392 (200) | 380 (55) 380 | 88 (610) |
| 482 (250) | 370 (54) 370 | 87 (600) |
| Temp, °C (°F) | Yield Strength, 0.2% offset ksi (MPa) | Tensile Strength ksi (MPa) |
|---|---|---|
| 68 (20) | 65 (450) | 101 (700) |
| 122 (50) | 59 (410) | 98 (675) |
| 212 (100) | 55 (380) | 94 (650) |
| 302 (150) | 52 (360) | 91 (630) |
| 392 (200) | 51 (350) | 87 (600) |
| 482 (250) | 48 (330) | 83 (570) |
| 572 (300) | 46 (320) | 78 (540) |
Zeron 100 has good impact strength. There is no true ductile
brittle transition, just a gradual decrease in impact energy as the temperature is
lowered. The impact energy varies according to product type and production route. Some
typical values are shown in Figure 1 on the following page.
The impact strength of welded Zeron 100 is slightly less than that of parent metal (See
also figure 1). Present data suggests that 30 ft. lbf (40J) is a suitable acceptance
criterion for duplex stainless steels and Figure 1 shows that 40J is achievable with
all product forms of Zeron 100 down to very low temperatures.
However, to obtain good impact toughness after welding, a higher level of impact
toughness is required in the parent metal. Zeron 100 typically has a Charpy toughness
> 70J at -58°F (-50°C).
Mechanical properties of the three super duplex grades a procurement engineer typically evaluates against Zeron 100. Values shown are solution-annealed minimum acceptance per ASTM A479 / A1082.
| Property | Zeron 100 (S32760) | SAF 2507 (S32750) | Ferralium 255 (S32550) |
|---|---|---|---|
| 0.2% Yield (Rp0.2) | ≥ 550 MPa | ≥ 550 MPa | ≥ 550 MPa |
| Ultimate Tensile (Rm) | ≥ 750 MPa | ≥ 795 MPa | ≥ 760 MPa |
| Elongation | ≥ 25% | ≥ 15-25% | ≥ 15% |
| Hardness (NACE cap) | ≤ 28 HRC | ≤ 28 HRC | ≤ 32 HRC |
| Charpy at -46°C | ≥ 45 J | ≥ 45 J | ≥ 60 J (RT) |
