Alloy C450, XM-25 martensitic age-hardenable stainless steel which exhibits very good corrosion resistance with strength. XM-25 alloy has a yield strength somewhat greater than 689 MPa in the annealed condition. A single-step aging treatment develops higher strength with good ductility and toughness. This stainless can be machined, hot-worked, and cold-formed in the same manner as other martensitic age-hardenable stainless steels. A particular advantage is ease of welding and brazing. XM-25 stainless is generally supplied in the annealed condition, requiring no heat treatment by the user for many applications. Mechanical properties will depend on the aging temperature selected.
GTD 450 martensitic age-hardenable stainless steel. This alloy is relatively soft and formable in the annealed condition. A single-step aging treatment develops exceptionally high yield strength with good ductility and toughness. This stainless can be machined in the annealed condition, and welded in much the same manner as other precipitation hardenable stainless steels. Because of its low work-hardening rate, it can be extensively cold formed. The dimensional change during hardening is only about -0.001 in/in, which permits close-tolerance finish machining in the annealed state. GTD 450 stainless represents a significant advancement in the area of precipitation hardening stainless steels. It should be considered where simplicity of heat treatment, ease of fabrication, high strength and corrosion resistance are required in combination.
Custom 450 stainless steel has very good corrosion resistance, high strength and good processing characteristics. A simple one-step aging treatment can make Custom450 obtain high strength, good plasticity and toughness.
| Grade | Chemical Composition WT % | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C | Mn | Si | P | S | Cr | Cu | Ni | Mo | Nb | V | N | Ag | Pb | Sn | Ai | |
| C450 | ≤0.05 | ≤1.00 | ≤1.00 | ≤0.03 | ≤0.03 | 14.0-16.0 | 1.25-1.75 | 5-7 | 0.5-1.0 | 0.35-0.75 | ||||||
| Alloy 450 | ≤0.05 | ≤1.00 | ≤1.00 | ≤0.03 | ≤0.03 | 14.0-16.0 | 1.25-1.75 | 5-7 | 0.5-1.0 | 0.35-0.75 | ||||||
| UNS S45000 | ≤0.05 | ≤1.00 | ≤1.00 | ≤0.03 | ≤0.03 | 14.0-16.0 | 1.25-1.75 | 5-7 | 0.5-1.0 | Nb >8 x (%C) | ||||||
| XM-25 | ≤0.05 | ≤1.00 | ≤1.00 | ≤0.03 | ≤0.03 | 14.0-16.0 | 1.25-1.75 | 5-7 | 0.5-1.0 | Nb >8 x (%C) | ||||||
| GTD450, B50A789 Class A, B, E, F, H | 0.025-0.045 | ≤1.00 | ≤1.00 | 0.025 | 0.005 | 14-16 | 1.25-1.75 | 6-7 | 0.5-1.0 | 0.4-0.75 / 14 x C Min | 0.1 | 0.03 | 0.005 | 0.005 | 0.1 | 0.05 |
| GTD450, B50A789 Class G | 0.03-0.05 | 0.3-0.8 | 0.2-0.5 | 0.020 | 0.005 | 14-16 | 1. 35-1.75 | 6.2-6.8 | 0.6-1.0 | 8xC-15xC | 0.1 | 0.03 | 0.005 | 0.005 | 0.1 | 0.03 |
| ASTM A564 | ≤0.05 | ≤1.00 | ≤1.00 | ≤0.03 | ≤0.03 | 14.0-16.0 | 1.25-1.75 | 5-7 | 0.5-1.0 | Nb >8 x (%C) | ||||||
| 04Cr15Ni7Cu2MoNbVN | 0.03-0.05 | 0.2-0.5 | 0.3-0.8 | 0.02 | 0.005 | 14-16 | 1.35-1.75 | 6.2-6.8 | 0.6-1.0 | 8*C-15*C | 0.10 | 0.03 | 0.005 | 0.005 | 0.10 | |
| X 5 CrNiMoCuNb 14 5 | ≤0.07 | ≤1.00 | ≤0.70 | ≤0.04 | ≤0.015 | 13.0-15.0 | 1.20-2.00 | 5.0-6.0 | 1.20-2.00 | 0.15-0.60 | ||||||
| 1.4594 | ≤0.07 | ≤1.00 | ≤0.70 | ≤0.04 | ≤0.015 | 13.0-15.0 | 1.20-2.00 | 5.0-6.0 | 1.20-2.00 | 0.15-0.60 | ||||||
| Custom 450 | ≤0.05 | ≤0.50 | ≤0.50 | ≤0.03 | ≤0.03 | 14.50-16.50 | 1.25-1.75 | 5.50-7.00 | 0.50-1.00 | |||||||
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.80 cm³ | 0.282 lb/in³ |
XM-25, S45000, 450 Alloy stainless steel alloy can be hot worked by soaking at 1150-1177°C (2100-2150°F) followed by cooling and fully annealing.
XM-25, S45000, 450 Alloy stainless steel alloy can be cold worked using all common techniques.
XM-25, S45000, 450 Alloy stainless steel alloy is annealed by soaking at 1024-1052°C (1875-7925°F) for 1 h followed by quenching in water or oil.
XM-25, S45000, 450 Alloy stainless steel alloy is soaked at specific temperature for 4 h followed by cooling to obtain condition H900, H950, H1000, H1050 or H1150.
Solution annealing: heating to 1024 ℃ ~ 1052 ℃, holding for 15h. and cooling rapidly. In order to achieve the best aging effect, water quenching is preferred. Custom 450 is generally delivered in the solution annealed state at the factory, and then ready for use or subsequent age hardening treatment. Age hardening: increase the tensile strength and yield strength of Custom 450 by aging at 427 ° C ~ 538 ° C for 4 hours, and then air cooling. The recommended 482°C aging can make it obtain the best combination of strength, plasticity and toughness. Overaging at temperatures up to 538°C increases its plasticity and reduces its strength. Dimensional shrinkage during heat treatment: age hardening at 482°C, approximately 0.001 inch per inch shrinkage. Critical temperature: A--632°C: A--707°C: M--118°C: M--38°C
XM-25, S45000, 450 Alloy stainless steel alloy can be welded using shielded methods to reduce contamination. Custom 450 solderability - Soldering and Brazing: No preheating is required to prevent cracking during soldering. Standard methods of welding stainless steel can be used with Custom 450. When optimum corrosion resistance is required, parts should be annealed after welding. A similar (Cmstom 450) filler material should be used to maintain optimum weld metal strength. The recommended brazing temperature should be consistent with the annealing temperature range so that re-annealing is not necessary. Brazing consumables used for Type 304 stainless steel shall be used.
XM-25, S45000, 450 Alloy stainless steel alloy uses feeds and speeds comparable with other martensitic stainless steels. It is preferred to use positive feeds and slow speeds to achieve good results.Custom 450 Machinability: This alloy can be successfully machined by the same process as other martensitic stainless steels of comparable strength classes.thermal processing - this alloy is easy to thermal process in the temperature range of 900 ℃ ~ 1260 ℃. It is not only easy to process, but also to obtain fine grain size (this alloy). The optimum thermal processing temperature range is 1150 ° C ~ 1177 ° C. Cold working - Custom450 has a low work hardening rate and can be subjected to a large amount of cold working without intermediate annealing. Sharply bent deep drawing or stretching operations that produce localized elongations are to be avoided.
| Grade | Shape | Dimension mm | Qty. kg |
|---|---|---|---|
| C450 | Round bar | Φ150 | 3626 |
| Alloy C450 | Round bar | Φ55 | 1625 |
Custom 450, XM-25, S45000, 450 Alloy, 1.4594, X5CrNiCuMo15-06, X5CrNiMoCuNb14-5, GE B50A789, MAT 238863, 04Cr15Ni7Cu2MoNbVN
