JIS G7223 TW 430 Introduce
Steel is one of the oldest, most widely used, and versatile materials known to man. It has a wide range of properties that can be tailored to a variety of applications and has been used by many cultures for centuries. One variant of steel that is important to consider is JIS G7223, a Japanese steel that has chemical properties that makes it particularly suitable for certain uses.
Smelting temperature:1261°C - 1275°C
Application:Welded pressure steel pipes - Technical delivery conditions - Part 1: Non-alloy steel tubes
JIS G7223 TW 430 Material Chemical Composition
The chemical composition of the JIS G7223 TW 430 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 0.3500 |
| Sulfur (S) | - | 0.0400 |
| PhOsphorus (P) | - | 0.0400 |
| Manganese (Mn) | 0.4000 | 1.2000 |
| Carbon (C) | - | 0.2100 |
JIS G7223 TW 430 Material Mechanical Properties
JIS G7223 TW 430 steel has good strength and ductility properties, combined with good weldability. The tensile strength of the steel is 550 N/mm2 to 950 N/mm2, with a yield strength of 380 N/mm2 to 630 N/mm2. Its elongation ranges from 20% to 25%, and its impact absorption rate ranges from 20 J to 40 J. It also has excellent heat treatment properties, with a hardness Rockwell C ranging between HRC35 and HRC45, depending on the composition and desired properties.
The mechanical properties of the JIS G7223 TW 430 steel are as follows:
| YieldRp0.2 | ≤ 398 (MPa) |
| TeileRm | ≤ 675 (MPa) |
| ImpactKV/Ku | 21(J) |
| ElongationA | 34% |
| Reduction in cross section on fractureZ | 22% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 233 |
JIS G7223 TW 430 Material Thermal Properties
The thermal performance parameters of the JIS G7223 TW 430 steel are as follows:
| Temperature (°C) | 11 | 464 | 113 |
| Modulus of elasticity (GPa) | - | 811 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 34 |
| Thermal conductivity (W/m·°C) | - | 34.3 | 42.2 |
| Specific thermal capacity (J/kg·°C) | - | 211 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.31 | - | - |
| Deity (kg/dm³) | - | - | 331 |
| Poisson’s coefficient, ν | - | - | 341 |
JIS G7223 TW 430 Material Machining Technology
JIS G7223 TW 430 is a medium carbon, 0.3-0.5% Niobium, low alloy steel designation. It is also known by the trade names "Niobium Steel," "Niobium Alloy Steel," or simply "Nb Steel." In terms of physical properties, JIS G7223 TW 430 steel displays superior tensile strength, yield strength, and impact toughness when compared to SAE 1020 mild steel.