描述:
Alloy 825是一种添加了钼、铜和钛(NiCr21Mo)的镍铁铬合金，在热加工和退火后供应。 它在从低温到中高温(5400C)的范围内均具有良好的机械属性，并可通过冷加工来显著提升强度。
较高的镍含量可确保耐应力腐蚀开裂，添加钼和铜可有效耐受诸如硫酸和磷酸等还原环境，添加铬可耐受诸如硝酸等氧化环境，添加钛可耐受晶间腐蚀，因此能全面耐点蚀和裂隙腐蚀。
主要特征:
- 在各类腐蚀性环境中都具有出色的耐腐蚀性，包括海水和工业酸
- 可轻易地成形和焊接
- 卓越的耐应力腐蚀开裂性能
应用:
- 化学工艺设备
- 污染控制系统和湿式除尘器
- 废热回收换热器
- 储罐、容器和搅拌器
- 用于腐蚀性/酸性环境的井下设备
- 核废料再处理和装卸
化学成分:
|
Cr |
Ni |
Mo |
Co |
Nb (+Ta) |
Ti |
W |
Cu |
C |
Mn |
N |
Si |
P |
S |
Fe |
Al |
| 最低限度 |
19.50 |
38.00 |
2.50 |
|
|
0.60 |
|
1.50 |
|
|
|
|
|
|
22.00 |
|
| 最大值 |
23.50 |
46.00 |
3.50 |
|
|
1.20 |
|
3.00 |
0.05 |
1.00 |
|
0.50 |
|
0.03 |
|
0.20 |
机械性能:
| 0.2% 证明力量 |
241 N/mm2 |
35 ksi |
| 抗拉强度 |
590 N/mm2 |
86 ksi |
| 伸长, 5.65√S0 and 4D |
30% |
|
| Reduction of Area |
40% |
|
| 硬度 |
327 max. |
|
笔记:
- 应根据ASTM A370或EN10002-1进行抗拉强度测试
- 引用最少的属性（在纵向和室温下测试）
- 按照热处理批次对每种熔体材料进行测试
物理性质:
| 密度 (Kg.m-1) |
81.4 |
| 磁导率 (20°C) |
1.005 |
| Curie Temperature (°C) |
-196 |
| Young’s Modulus (N/mm2) |
196 |
| 比热, 20°C (J/(g.K)) |
440 |
| 比电阻, 20°C (Ω-m) |
0.00113 |
| 导热系数, 20°C (W/(m.K)) |
10.8 |
| 热膨胀, 20-100°C (/K) |
14.1 x 10-6 |
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Datasheet - NA-Alloy 825 (Bar)
