ASTM A240 SS 304 / 1.4301 BA Stainless Steel Strip Coil for Auto Application
BA stainless steel strip coil refers to a type of stainless steel strip that has been processed with a bright annealed finish. This finish is achieved by annealing the steel in a controlled atmosphere furnace, followed by a final light cold roll pass on polished rolls. The result is a highly reflective, mirror-like surface with excellent flatness and thickness tolerances. BA stainless steel strip coil is commonly used in applications that require a high degree of reflectivity, such as decorative trim, automotive trim, and appliances.
| Surface Finish of stainless steel coil |
| Surface Finish | Definition and Application |
| No.1 | The surface is finished by heat treatment and pickling or processes corresponding theretoafter hot rolling |
| 2D | The finishes after cold rolling, by heat treatment, pickling or other equivalenttreatment |
| 2B | The finish after cold rolling, by heat treatment, pickling or other equivalent treatment and lastly by cold rolling to give an appropriate luster |
| BA | Cold rolled, bright annealed and skin-passed, the product have excellent brightness and good reflexivity like mirror |
| NO.3 | Polished with abrasive belt of grit#100~#200,have better brightness with discontinuous coarse stria |
| NO.4 | Polished with abrasive belt of grit#150~#180,have better brightness with discontinuous coarse stria |
| HL | Polished with abrasive belt of grit#150~#320 on the NO.4 finish and has continuous streaks |
| 8K | The product have excellent brightness and prefect reflexivity can be the mirror |
| Type, Mechanical Properties, Physical Properties |
| Type | Chemical Composition (%) | Mechanical Properties | Physical Properties |
| KS(JIS) | POSCO | C | Cr | Ni | Mo | Others | Yield Strength (0.2%) | Tensile Strength | Elongation (%) | Hardness (Hv) | Specific Heat J/g °C | Specific Gravity | Thermal Expansion Coefficient | Thermal Conductivity |
| (N/mm²) | (N/mm²) | W/m·°C | W/m·°C |
|
| (20-100°C) | (100°C) |
| 410 | 410 | ~0.15 | 11.5~ 13.5 | - | - | - | 205~ | 440~ | 20~ | 210~ | 0.46 | 7.7 | 9.9 | 24.9 |
| - | 410B | ~0.15 | 11.5~ 13.5 | 0.6 | - | - | 205~ | 440~ | 20~ | ~210 | 0.46 | 7.75 | 9.9 | 24.9 |
| - | 420N1 | ~0.17 | 12.0~ 14.0 | - | - | N~0.14 | 225~ | 520~ | 18~ | ~218 | 0.46 | 7.75 | 10.3 | 23.8 |
| 420J2 | 420J2 | 0.26~ 0.4 | 12.0~ 14.0 | - | - | - | 225~ | 540~ | 18~ | ~247 | 0.46 | 7.75 | 10.3 | 23.8 |
| Type,Mechanical Properties, Physical Properties |
| Type | Chemical Composition (%) | Mechanical Properties | Physical Properties |
| KS(JIS) | POSCO | C | Cr | Ni | Mo | Others | Yield Strength (0.2%) | Tensile Strength | Elongation (%) | Hardness (Hv) | Specific Heat J/g °C | Specific Gravity | Thermal Expansion Coefficient | Thermal Conductivity |
| (N/mm²) | (N/mm²) | W/m·°C | W/m·°C |
|
| (20-100°C) | (100°C) |
| 409L | 409L | 0.03 | 10.50~ 11.75 | - | - | Ti 6xC%~0.75 | 175~ | 360~ | 25~ | ~175 | 0.46 | 7.75 | 6.5 | 24.9 |
| - | HIPOS | ~0.03 | 12~14 | - | - | Si~1.3 | 175~ | 360~ | 22~ | ~180 | - | - | - | - |
| 410L | 410L | ~0.03 | 11.0~ 13.5 | - | - | - | 195~ | 360~ | 22~ | ~200 | 0.46 | 7.75 | 9.9 | 25.1 |
| - | 429EM | 0.02 | 13.0~ 15.0 | - | - | Si~1.5 | 205~ | 400~ | 25~ | ~180 | 0.456 | 7.62 | 10.6 | 20.9 |
| 430 | 430 | ~0.12 | 16.0~ 18.0 | - | - | - | 205~ | 450~ | 22~ | ~200 | 0.46 | 7.7 | 10.5 | 23.9 |
| 430J1L | 430J1L | ~0.025 | 16.0~ 20.0 | - | - | N~0.025 | 205~ | 390~ | 22~ | ~200 | 0.46 | 7.7 | 10.4 | 26.2 |
| 430Ti | 430Ti | ~0.02 | 19.5~ 20.5 | - | - | Ti 0.3~0.6 | 206~ | 422~ | 25~ | ~180 | 0.46 | 7.7 | 10.4 | 26.4 |
| 436L | 436L | ~0.025 | 16.0~ 19.0 | - | 0.75~ 1.5 | Ti, Nb, Zr 8x(C%+N%)~0.8 | 245~ | 410~ | 20~ | ~230 | 0.46 | 7.7 | 9.3 | 23.9 |
| - | 439 | 0.03 | 17.0~ 19.0 | - | - | Ti 0.2~1.0 | 175~ | 400~ | 22~ | ~175 | 0.46 | 7.7 | 10.5 | 26.4 |
| - | 441 | ~0.03 | 17.5~ 18.5 | ~1.0 | - | Si~1.0 Ti 0.1~0.6 Nb 9C+0.3~1.0 | 250 | 430~ 630 | 25~ | ~175 | 0.462 | 7.6 | 10.1 | 27.1 |
| 444 | 444 | ~0.025 | 17.0~ 20.0 | - | 1.75~ 2.5 | Ti, Nb, Zr 8x(C%+N%)~0.8 | 245~ | 410~ | 20~ | ~230 | 0.427 | 7.75 | 11 | 26.8 |
| - | 445NF | ~0.015 | 20.0~ 23.0 | ~0.5 | - | Ti+Nb 10(C+N)~0.6 | 245~ | 410~ | 22~ | ~200 | 0.44 | 7.74 | 10.5 | 23 |
| 446M | 446M | 0.015 | 25~ 28.5 | ~0.3 | 1.5~2.5 | Ti+Nb 8~(C+N) | 270~ | 430~ | 20~ | ~210 | 0.5 | 7.75 | 11 | 18.84 |
| Type | Chemical Composition (%) | Mechanical Properties | Physical Properties |
| KS(JIS) | POSCO | C | Cr | Ni | Mo | Others | Yield Strength (0.2%) | Tensile Strength | Elongation (%) | Hardness (Hv) | Specific Heat J/g °C | Specific Gravity | Thermal Expansion Coefficient | Thermal Conductivity |
| (N/mm²) | (N/mm²) | W/m·°C | W/m·°C |
|
| (20-100°C) | (100°C) |
| 329J3L | 329J3L | ~0.03 | 21.0~ 24.0 | 4.5~ 6.5 | 2.5~ 3.5 | N 0.08~0.20 | 450~ | 620~ | 18~ | ~320 | 0.4 | 7.8 | 13.7 | 19 |
| 329LD | 329LD | ~0.03 | 19.0~ 22.0 | 2.0~ 4.0 | 1.0~ 2.0 | N 0.14~02 | 450 | 620~ | 25~ | ~310 | 0.52 | 7.71 | 13.2 | 16.5 |
| Mn 2.0~4.0 |
The Advantages of 304 Stainless Steel Strips
1. The main component of the stainless steel band is 304, which can be used as a decorative tube, industrial tube, and some shallow stretched products. Because it has better processing properties than 201 and 304L, it can be more widely used in production;
2. The 304 stainless steel strip has high plasticity, toughness and cold deformation ability, and is not easy to form a hardening tendency during work;
3. The intergranular corrosion resistance of the 304 stainless steel strip is good after welding or after the stress relief treatment;
4. The heat treatment of 304 stainless steel strip can get good mechanical properties such as high strength and toughness;
5. Different finish treatments can be given to the surface of 304 stainless steel strip to obtain excellent surface conditions such as bright surface or mirror surface;
6. Excellent corrosion resistance in different environments such as atmospheric corrosion resistance, seawater corrosion resistance and high temperature oxidation resistance.
