Q420GJE-Z35 construction steel data sheet

High rise building steel is a major category of carbon steel materials. As soon as you see GJ, you can know that the material type is high rise building steel. They comply with the GB/T 19879 standard. In Chinese standard materials, Q mostly refers to yield strength, 420 refers to yield strength value (MPa), and there are specific requirements for different thicknesses, E refers to impact temperature (-40°C), and Z35 refers to Z-direction performance (thickness direction performance).

Q420GJE-Z35 construction steel smelting composition (chemical composition):
C: ≤0.18; Si: ≤0.55; Mn: ≤1.60; P: ≤0.020; S: ≤0.015; V: 0.020-0.200; Nb: 0.015-0.060; Ti: 0.010-0.030; Als: ≥0.015; Cr: ≤0.40; Cu: ≤0.30; Ni: ≤0.70

Q420GJE-Z35 construction steel tensile strength:
The tensile strength of Q420GJE-Z35 material is 520-680 Mpa.

Q420GJE-Z35 construction steel yield strength [ReL (N/mm2)]
6-16mm: ≥420 ；
16-35mm: 420-550；
35-50mm: 410-540；
50-100mm: 400-530;

Q420GJE-Z35 steel impact properties:
The material shall not be less than: 34 (longitudinal) Akv/J
Impact performance refers to the ability to resist impact, usually also refers to impact toughness.

Q420GJE-Z35 construction steel ultrasonic testing:
Z-direction steel is provided with three-level flaw detection, and the flaw detection levels include: Level I and Level II; For the Chinese standard, the first level flaw detection is a higher level.