Standard No.:	GB/T 3246.1-2012
English Name:	Inspection method for structure of wrought aluminum and aluminum alloy products Part 1 : Inspection method for microstructure
Chinese Name:	变形铝及铝合金制品组织检验方法 第1部分：显微组织检验方法
Chinese Classification:	H24    Metallographic testing method
Professional Classification:	GB    National Standard
ICS Classification:	77.040.99 77.040.99    Other methods of testing of metals 77.040.99
Source Content Issued by:	AQSIQ;SAC
Issued on:	2012-12-16
Implemented on:	2013-10-1
Status:	superseded
Superseded by:	GB/T 3246.1-2024 Inspection method for structure of wrought aluminium and aluminium alloy products—Part 1: Inspection method for microstructure
Superseded on:	2024-10-1
Superseding:	GB/T 3246.1-2000 Wrought Aluminum and Aluminum Alloys Products Inspection Method for Structure GB/T 3246.1-2024 Inspection method for structure of wrought aluminium and aluminium alloy products—Part 1: Inspection method for microstructure
Target Language:	English
File Format:	PDF
Word Count:	10500 words
Translation Price(USD):	310.0
Delivery:	via email in 1 business day

1 Scope This part of GB/T 3246 specifies test solution, specimen preparation, etching, anodizing membrane preparation, structure inspection, determination of grain size and test report for microstructure inspection of aluminum and aluminum alloy ingot casting (or ingot blank), wrought aluminum and aluminum alloys plate, strip, foil, tube, bar, profile, line and forging (hereafter referred to as processed products). This part is applicable to microstructure inspection of aluminum and aluminum alloy ingot casting (or ingot blank) and processed products. 2 Test Solution 2.1 Nitric acid solution (1+4). 2.2 Perchloric acid ethanol solution (1+9). 2.3 Nitric acid solution (1+2.5)~nitric acid solution (1+1). 2.4 No.1 Etchant: hydrofluoric acid solution (1+200). 2.5 No.2 Etchant: hydrofluoric acid solution (1+1). 2.6 No.3 Etchant: phosphoric acid solution (1+9). 2.7 No.4 Etchant: sulfuric acid solution (1+9) ~sulfuric acid solution (2+8). 2.8 No.5 Etchant: nitric acid solution (1+3). 2.9 No. 6 Etchant: uniform mixture of 2:3:5:190 hydrofluoric acid (ρ 1.15 g/mL): hydrochloric acid (ρ 1.19 g/mL): nitric acid (ρ 1.40 g/mL): water. 2.10 No. 7 Etchant: uniform mixture of 2:1:1:76 hydrofluoric acid (ρ 1.15 g/mL): hydrochloric acid (ρ 1.19 g/mL): nitric acid (ρ 1.40 g/mL): water. 2.11 No.8 Etchant: uniform mixture of 2:3:5:250 hydrofluoric acid (ρ 1.15 g/mL): hydrochloric acid (ρ 1.19 g/mL): nitric acid (ρ 1.40 g/mL): water. 2.12 Nitric acid solution (1+19) ~nitric acid solution (1+3). 2.13 Sulfuric acid - phosphoric acid solution: uniform mixture of 38:43:19 sulfuric acid (ρ 1.84 g/mL): phosphoric acid (ρ 1.70 g/mL): water. 2.14 Fluoboric acid solution (25 g/L).

Foreword i 1 Scope 2 Test Solution 3 Specimen Preparation 4 Specimen Etching 5 Anodizing Membrane Preparation 6 Structure Inspection 7 Determination of Grain Size 8 Test Report