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概述
420J2 stainless steel wire is a martensitic stainless steel alloy containing 12–14% chromium, a higher carbon content than standard 420, and added sulfur for improved machinability. It is widely used for cutlery, surgical blades, fasteners, springs, and industrial knife blades. After quenching and tempering, it achieves high hardness (up to 52 HRC) with good wear resistance and moderate corrosion resistance. The "J2" designation (JIS) corresponds to a higher carbon variant comparable to ASTM 420C, not the lower-carbon J1 variant.
尺寸范围
- Dia:0.08 – 12.0mm(0.003 – 0.472in)
- Coil Weight:1 – 200 kg
- Spool ID:100 – 500 mm
- Spool Type:Plastic, wooden, metal
牌号标准
| 标准体系 | 数值 |
|---|---|
| 🇺🇸 UNS | S42020 |
| 🇯🇵 JIS | SUS 420J2 |
| 🇪🇺 EN | EN 1.4028 / X39Cr13 |
| 🇩🇪 DIN | 1.4028 / X40Cr14 |
| 🇨🇳 GB | 30Cr13 (3Cr13) / 40Cr13 (4Cr13) |
| 🇷🇺 GOST | 20X13 (X20Cr13) / 40X13 (X40Cr13) |
| 🇦🇺 AS | 420 (C420) |
化学成分
| 元素 | 数值 |
|---|---|
| C | 0.26 – 0.40 |
| Si | ≤ 1.00 |
| Mn | ≤ 1.00 |
| P | ≤ 0.040 |
| S | ≤ 0.030 (1.4028: ≤0.015 typically) |
| Cr | 12.0014 |
| Ni | ≤ 0.60 |
| Mo | ≤ 0.30 |
| Cu | ≤ 0.30 |
| Fe | Remainder |
机械性能
| productCenter.property | 数值 |
|---|---|
| Tensile Strength (MPa) | 540 – 650 |
| Yield Strength (MPa, 0.2% offset) | ≥ 345 |
| Elongation (%) | 20 – 30 |
| Reduction of Area (%) | 50 – 65 |
| Hardness (HB) | ≤ 223 |
| Hardness (HRB) | ≤ 95 |
物理性能
| 性能 | 单位 | 数值 |
|---|---|---|
| Density (g/cm³) | g/cm³ | 7.70 |
| Melting Point (°C) | °C | ~1,450 |
| Melting Range (°C) | °C | 1,370 – 1,480 |
| Modulus of Elasticity (GPa) | GPa | 200 |
| Modulus of Rigidity (GPa) | - | 77 |
| Poisson's Ratio | - | 0.28 |
| Specific Heat (J/kg·K, 25°C) | J/kg·K | 460 |
| Thermal Conductivity (W/m·K, 25°C) | W/m·K | 24.9 |
应用场景
- Cutlery & Kitchenware
- Industrial Blades & Knives
- Springs & Wire Forms
- Fasteners & Hardware
- Precision Engineering
- Petrochemical & Process Equipment
- Firearms & Defense
- Textile & Other