| Element | Brand | C | Si | Mn | P | S | Cr | Mo | Ni | B | CEV |
| Grade | | | | | | | | | | | |
| AR400 | DELTA | ≤0.25 | ≤0.70 | ≤1.60 | ≤0.025 | ≤0.010 | ≤1.4 | ≤0.50 | ≤1.00 | ≤0.004 |
AR400 Mechanical Properties
| Grade | Class | Hardness (HB) | 20°CAKV(Portrait)J |
| AR400 | A | 360~430 | |
| AR400 | B | 360~430 | |
The measured values of steel plate tensile properties Rp0.2, Rm and
A50 are provided.
The measured values of longitudinal impact of steel plate at 0°C
and -20°C are provided.
Hardness is divided into: Rockwell hardness, Brinell hardness,
Vickers hardness, Richwell hardness, Shore hardness, Barinell
hardness, Nooul hardness, Weinwell hardness. Vickers hardness is
expressed by HV, Rockwell hardness can be divided into HRA, HRB,
HRC, HRD, Brinell hardness is expressed by Hb [N(KGF /mm2)]
(HBSHBW) (refer to GB/T231-1984). It is not a simple physical
concept to measure the hardness of steel parts after annealing,
normalizing and tempering by Brinell hardness method in production.
It is a comprehensive index of mechanical properties such as
elasticity, plasticity, strength and toughness of materials.
Hardness test according to the different test methods can be
divided into static pressure method (such as Brinell hardness,
Rockwell hardness, Vickers hardness, etc.), scratch method (such as
Mohr hardness), bounce method (such as Shore hardness) and micro
hardness, high temperature hardness and other methods.
