- Penerangan
Rod Pepejal Keluli Tahan Karat: Weight Calculation Method Explained
Stainless steel solid rod is widely used in machining, pembinaan, bahagian mekanikal, and structural applications. One of the most important engineering parameters for procurement and cost estimation is weight calculation, which is directly related to diameter, panjang, and material density.
Understanding how to calculate the weight of stainless steel solid rod helps engineers, buyers, and fabricators estimate cost, transportation load, and inventory planning more accurately.
Basic Weight Calculation Formula
The standard formula for calculating the weight of a stainless steel round rod is based on volume and density:
Berat badan (kg) = π × (D² ÷ 4) × L × ρ
Where:
- D = diameter (mm)
- L = length (m)
- ρ = ketumpatan keluli tahan karat (biasanya 7.93 g/cm³ or 7930 kg/m³)
- π = 3.1416
Simplified Engineering Formula (Common Industry Use)
For fast estimation in industrial applications, a simplified formula is often used:
Berat badan (kg/m) = 0.00623 × D² (D in mm)
This is the most commonly used quick calculation method in stainless steel rod procurement and stock management.
Weight Calculation Example
Contoh: 20 mm diameter stainless steel solid rod
- Diameter (D) = 20 mm
- Length = 1 meter
Using simplified formula:
Berat = 0.00623 × 20 × 20 = 2.492 kg/m
So a 6-meter bar weighs approximately 14.95 kg.
Stainless Steel Density Reference
| Gred Bahan | Ketumpatan (kg/m³) | Nota |
|---|---|---|
| 304 / 316 / 303 | 7930 | Keluli tahan karat austenit standard |
| 430 | 7700 | Keluli tahan karat ferit (slightly lighter) |
| 410 / 420 | 7750 | Keluli tahan karat martensit |
Key Factors Affecting Weight Accuracy
- Diameter tolerance (hot rolled vs cold drawn)
- Kemasan permukaan (ground or polished rods)
- Material grade density variation
- Length cutting accuracy
Industrial Importance of Weight Calculation
Accurate weight calculation is essential in stainless steel solid rod procurement for pricing, logistics, and engineering design. It ensures correct budgeting and prevents material shortage or over-ordering.
In global supply chains, suppliers such as Teda Ganghua provide stainless steel solid rods with standardized diameter tolerances and consistent density control to support accurate weight estimation for engineering and bulk purchasing.
Soalan Lazim
1. What is the formula for stainless steel rod weight?
Weight = π × (D² ÷ 4) × L × density, or simplified as 0.00623 × D² per meter.
2. What is the density of stainless steel?
Most stainless steels like 304 dan 316 have a density of about 7930 kg/m³.
3. How do I quickly estimate rod weight?
Use the simplified formula: 0.00623 × diameter² (in mm) to get kg per meter.
4. Does stainless steel grade affect weight?
ya, slightly. Ferritic and martensitic grades have slightly lower density than austenitic grades.
5. Does Teda Ganghua supply accurately sized stainless steel rods?
ya, Teda Ganghua provides precision-controlled stainless steel solid rods suitable for accurate engineering calculations.
