Sales hotline: +1 800 878 3675
Contact us on usa@langleyalloys.com to request a quote
Sales hotline: +1 800 878 3675
925 合金是一种添加了钼、铜、钛和铝、以固溶退火和时效状态供货的可沉淀硬化的镍铁铬合金。 特别添加了钛和铝,用于在时效过程中于整个合金基体中以 Ni3(Al, Ti) 伽马 (‘ϒ’) 主沉淀物形式为合金提供强度,以类似于合金 K-500、718 和 725 的方式极大地提高硬度和强度。
925 合金具有与 825 合金同样优异的耐腐蚀性。 较高的镍含量确保了抗应力腐蚀裂纹性能,同时额外添加的钼和铜使其具有了耐还原反应性能,与铬的耐氧化反应性能类似。 钼增强了耐点状腐蚀和隙间腐蚀性能,将耐点蚀当量 (PREN) 提高到了 26。 凭借这种平衡的成分,925 合金特别适合于在酸性气体井中的井下应用,并且也可用于腐蚀性稍小的应用中,因为它在大部分存在氯化物和硫化物的有水环境中都具备耐一般、点状、隙间和应力腐蚀的能力。
Cr | Ni | Mo | Co | Nb (+Ta) | Ti | W | Cu | C | Mn | N | Si | P | S | Fe | Al | |
Min | 19.5 | 42 | 2.5 | 0.08 | 1.9 | 1.5 | 0.1 | |||||||||
Max | 22.5 | 46 | 3.5 | 0.5 | 2.4 | 3 | 0.025 | 1 | 0.35 | 0.02 | 0.003 | Bal | 0.5 |
0.2% Proof Stress | 758-965 N/mm2 | 110-140 ksi |
Tensile Strength | 965 N/mm2 | 140 ksi |
Elongation, 5.65√S0 and 4D | 18% | |
Reduction of Area | 25% | |
Hardness | 38 HRC max. | |
Impact Strength(-60oC) Longitudinal | 47J av (43J min) | 35 ft.lb av (32 ft.lb min) |
– 肉眼可见腐蚀试验
– 证明无针状、二次及拉弗斯相
– 确定为各方向等大并显著符合或优于 ASTM2 标准(ASTM E112 x100 放大倍数)的晶粒尺寸
Density (Kg.m-1) | 8080 |
Magnetic Permeability (20°C) | 1.001 |
Young’s Modulus (N/mm2) | 199 |
Specific Heat, 20°C (J/(g.K)) | 435 |
Electrical Resistivity, 20°C (Ω-m) | 1.17x10-6 |
Electrical Conductivity, 20°C (mΩ/mm2) | 0.25 (1.48% IACS) |
Thermal conductivity, 20°C (W/(m.K)) | 12 |
Mean coefficient of thermal expansion, 20-100°C (m/m/K) | 13.2x10-6 |
Worldwide Delivery Available
We can offer air, sea and road freight shipping options, with choice of packaging, to deliver to customers globally.
Inventory Management
Let us manage your total material requirements with call-off and consignment arrangements.
Up to 40 sizes per alloy available
More sizes equal less machining and a more cost-effective supply chain.