ASTM B985-12(2016)
成分分析用铝锭、坯料、铸件和成品或半成品锻铝产品抽样的标准规范

Standard Practice for Sampling Aluminum Ingots, Billets, Castings and Finished or Semi-Finished Wrought Aluminum Products for Compositional Analysis

ASTM B985-12(2016) 发布历史

ASTM B985-12(2016)由美国材料与试验协会 US-ASTM 发布于 2012。

ASTM B985-12(2016) 在中国标准分类中归属于: H12 轻金属及其合金分析方法，在国际标准分类中归属于: 77.150.10 铝产品。

ASTM B985-12(2016) 发布之时，引用了标准

• ASTM B881 铝和镁合金产品的标准术语
• ASTM E1251 使用氩保护气氛,点到面,单极自激发电容器放电法对铝和铝合金进行光射光谱分析的标准试验方法
• ASTM E135 金属、矿石及相关材料的分析化学的有关标准术语
• ASTM E34 铝和铝基合金化学分析的标准试验方法
• ASTM E607 在氮气芬围中用点对面技术作铝合金的原子辐射光谱测定分析的标准试验方法
• ASTM E716 光谱化学分析用铝和铝合金取样

ASTM B985-12(2016)的历代版本如下：

• 2012年 ASTM B985-12(2016) 成分分析用铝锭、坯料、铸件和成品或半成品锻铝产品抽样的标准规范
• 2012年 ASTM B985-12 成分分析用铝锭、坯料、铸件和成品或半成品锻铝产品抽样的标准规范

5.1 Products covered by this practice are unwrought aluminum ingots, billets, and castings and unclad wrought aluminum sheet, plate, rolled or cold finished extrusions, extruded profiles, wire, rod and bar. Machined wrought products (finished or semi-finished) are excluded (see Note 3). These practices, used in conjunction with the appropriate sample preparation techniques in Practices E716 and the Test Methods E34, E607, E1251, and EN 14242, are suitable to determine if the piece sampled meets the chemical composition limits registered with the Aluminum Association Inc.5 or other specified chemical composition limits for the alloy. Analysis of such samples shall not supersede the analysis of samples taken during pouring of castings or ingots in accordance with Practices E716 and analyzed in accordance with Test Methods E34, E607, E1251, or EN 14242 and shall not be used for determining compliance with chemical composition requirements for an entire cast lot or part thereof.

Note 3: Sampling machined pieces of products pose a particular problem because the piece itself may not be a representative sample of the original cast chemical composition. Larger differences may be expected between an analysis obtained from samples taken in accordance with this practice and the original cast analysis of samples taken during pouring of castings or ingot.

Note 4: Portable Spark-AES and hand held XRF instruments should not be used to determine if the piece sampled meets chemical composition limits registered with Aluminum Association Inc or other specified chemical composition limits for the alloy.

5.2 Users should be aware that chemical compositions determined using samples taken from unwrought aluminum ingots, billets, and castings and finished or semi-finished products might differ from the bulk chemical composition determined using samples taken when ingots or castings are poured. This difference can be due to elemental segregation upon solidification, sampling a non-homogenous section of the ingot or billet, removal of enriched material, or depleted areas of solidified material by subsequent procedures such as ingot scalping, the removal of risers from castings, or machining.

Note 5: When aluminum solidifies, macro-segregation may cause the chemical composition to vary throughout the ingot or casting. Certain areas may have enhanced or depleted concentrations of some elements relative to the average bulk chemical composition. Remnants of the macro-segregation may be retained in finished and semi-finished products. The sampling procedures described in this practice are designed to provide a laboratory sample for analysis which represents the chemical composition of the piece by taking samples in a way that symmetrically includes the various enhanced and depleted zones for example, sampling across the radius of a round ingot, and so forth.

标准号

ASTM B985-12(2016)

发布

2012年

发布单位

美国材料与试验协会

当前最新

ASTM B985-12(2016)

 

 

引用标准

ASTM B881 ASTM E1251 ASTM E135 ASTM E34 ASTM E607 ASTM E716

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