Standards

JB/T 9221-1999 Abolished

JB/T 9221-1999 The effective bentonite and effective coal powder test methods for wet sand used in casting

Publish Date: 1999-06-24

JB/T 9219-1999 Abolished

JB/T 9219-1999 JB/T 9219-1999 Ductile iron ultrasonic velocity determination method

Publish Date: 1999-06-24

JB/T 7946.1-1999 Abolished

JB/T 7946.1-1999 Metallographic morphology of cast aluminum-silicon alloy used for casting aluminum-silicon alloys in accordance with JB/T 7946.1-1999

Publish Date: 1999-06-24

JB/T 7946.2-1999 Abolished

JB/T 7946.2-1999 JB/T 7946.2-1999 Metallographic appearance of cast aluminum-silicon alloy: Overburning of cast aluminum-silicon alloy

Publish Date: 1999-06-24

JB/T 7946.3-1999 Abolished

JB/T 7946.3-1999 JB/T 7946.3-1999 Foundry Aluminum Alloy Microstructure and Pore of Foundry Aluminum Alloy

Publish Date: 1999-06-24

JB/T 7946.4-1999 Abolished

JB/T 7946.4-1999 Mold aluminum alloy metallography (Mold Al-Cu alloy grain size) JB/T 7946.4-1999

Publish Date: 1999-06-24

JB/T 4394-1999 Abolished

JB/T 4394-1999 JBT 4394-1999 Rare Earth Magnesium Alloy Chemical Analysis Method for Total Rare Earth Content, Silicon, and Magnesium

Publish Date: 1999-06-24

JB/T 9180.2-1999 Abolished

JB/T 9180.2-1999 JBT 9180.2-1999 Steel cold extrusion parts general technical specification

Publish Date: 1999-06-24

JB/T 4381-1999 Abolished

JB/T 4381-1999 Stamping and cutting blanking Tolerances on dimensions not otherwise specified Limiting deviation

Publish Date: 1999-06-24

JB/T 9180.1-1999 Abolished

JB/T 9180.1-1999 Tolerance for Steel Cold Extrusion Part

Publish Date: 1999-06-24

JB/T 4290-1999 Abolished

JB/T 4290-1999 JBT 4290-1999 High-speed tool steel forged parts - Technical specification。

Publish Date: 1999-06-24

JB/T 9175.1-1999 Abolished

JB/T 9175.1-1999 Precision stamping component Structural processability

Publish Date: 1999-06-24