Sep 26 2012
涵盖了主题
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Other Designations
制造和热处理
可加工性
Welding
Hot Working
Cold Working
Annealing
硬化
Introduction
不锈钢是高合金钢，由于存在大量铬在4％至30％的范围内，其耐腐蚀性高于其他钢。根据其结晶结构将不锈钢分为马氏体，铁素体和奥氏体。在Additon中，它们形成了另一组，称为降水钢钢，它们是马氏体和奥氏体钢的组合。
以下数据表将提供有关347H不锈钢级的更多详细信息，该钢比304级钢稍强。
Chemical Composition
The following table shows the chemical composition of grade 347H stainless steel.
| 元素 |
内容 （％） |
| Iron, Fe |
62.83-73.64 |
| 铬，Cr |
17-20 |
| Nickel, Ni |
9 - 13
|
| Manganese, Mn |
2 |
| 硅，SI |
1 |
| NIOBIUM，NB（Columbium，CB） |
0.320 - 1 |
| 碳，c |
0.04-0.10 |
| Phosphorous, P |
0.040 |
| 硫，s |
0.030 |
Physical Properties
The physical properties of grade 347H stainless steel are given in the following table.
| 特性 |
公制 |
帝国 |
| 密度 |
7.7 – 8.03 g/cm3 |
0.278 – 0.290 lb/in³ |
Mechanical Properties
下表显示了347H不锈钢级的机械性能。
| 特性 |
公制 |
帝国 |
| 拉伸力量，终极 |
480 MPA |
69600 PSI |
| 拉伸强度，产量 |
205 MPA |
29700 psi |
| 破裂强度（@750°C/1380°F，时间100,000小时） |
38 - 39 MPa, |
5510-5660 PSI |
| 弹性模量 |
190 – 210 GPa |
27557 - 30458 KSI |
| 泊松的比例 |
0.27 - 0.30 |
0.27 - 0.30 |
| 休息时伸长 |
29％ |
29％ |
| 硬度，布里尔 |
187 |
187 |
Other Designations
其他等同于347H不锈钢等效的名称包括：
- ASTM A182
- ASTM A213
- ASTM A240
- ASTM A249
- ASTM A271
- ASTM A312
- ASTM A336
- ASTM A376
- ASTM A403
- ASTM A430
- ASTM A479
- ASTM A813
- ASTM A814
- SAE 30347H
制造和热处理
可加工性
Machining grade 347H stainless steel is slightly tougher than that of grade 304 steel. However, the hardenability of this steel can be minimized by the use of constant positive feeds and slow speeds.
Welding
Grade 347H stainless steel can be welded using most of the resistance and fusion methods. Oxyacetylene welding is not preferred for this steel.
Hot Working
可以在1149至1232°C（2100至2250°F）下进行锻造，沮丧和其他热工作过程。347h级钢必须被水淬火并退火以获得最大的硬度。
Cold Working
Grade 347H stainless steel can be readily stamped, blanked, spun and drawn as it is quite tough and ductile.
Annealing
Grade 347H stainless steel can be annealed at temperature ranging from 1010 to 1193°C (1850 to 2000°F) and then quenched with water.
硬化
Grade 347H stainless steel is unresponsive to heat treatment. The hardness and strength of the steel can be increased through cold working.