| Model NO. | MD-8101650444003720 |
| Material | Stainless Steel |
| Surface Treatment | No Surface Treatment |
| Usage | Pipeline Transport, Oil/Gas Drilling, Machinery Industry, Chemical Industry, Construction & Decoration, Special Purpose |
| Section Shape | Round |
| Size | Od: From 6mm to 1000mm (Nps From 1/8'' to 40'') |
| Delivery Time | 20-35 Dys Ex Mill |
| Produce Process | Pilgering and Cold Drawn |
| Surface Process | Ap Tube/ Bp Tube |
| Marking | Grade, Seamless, Standard, Size, Ht No. |
| Sample | Can Provide |
| Loading Port | Shang Hai |
| OEM Accepted | Yes |
| Third Party Ertificate | BV, Lr, SGS, TUV, CCS, ABS, etc. |
| Package | Bundles with Waterproof Cloth Outside. |
| Transport Package | Standard Sea-Worthy Package |
| Specification | ISO |
| Trademark | Kingmetal |
| Origin | China (Mainland) |
| Production Capacity | 3000tons/Month |
AISI 420 SUS420J1 SUS420J2 Stainless Steel seamless Pipe
SUS420J2 is a martensitic stainless steel pipe that's used in many industries. It has good corrosion resistance and can be heat treated to increase its strength and hardness.
Applications
Alloy 420 is used for a variety of applications where good corrosion and outstanding hardness is necessary. It is not usually used at temperatures exceeding 800oF (427oC) due to quick hardening and loss of corrosion resistance.
Equivalent
EN
-
DIN,WNr
JIS
AFNOR
BS
UNI
GB
SS
PN
CSN
GOST
1.4028
Chemical Composition(%)
Heat Treatment
Annealing: For maximum softness, heat uniformly to 1500 - 1650°F (816 - 899°C) and cool slowly in the furnace.
Stress Relieving: Heat at 300 - 800°F (149 - 427°C) for 1 to 3 hours, cool in air or quench in oil or water.
Hardening: Preheat, then heat to 1800 -1950°F (982 - 1066°C), soak at temperature and air cool or quench in warm oil.
Corrosion Resistance
Under hardened conditions, grade 420 steels are resistant to fresh water, alkalis, air, foods and mild acids. The steel grades with a smooth surface finish have excellent performance. The corrosion resistance properties of grade 420 will tend to fall under annealed conditions. The corrosion resistance of grade 420 is lower than that of the grade 430 Ferritic alloys with 17% chromium, grade 410 steels and other austenitic grades. This steel grade finds application in cutlery such as carving knives, table knives and so on. Grade 420 steels have good corrosion resistance against food, but continuous exposure of metals to unwashed food substances can lead to pitting corrosion.
Heat Resistance
Grade 420 stainless steels have a scaling resistance at temperatures of up to 650°C. However, temperatures above standard tempering temperature are not suitable for this grade.
Machining
Grade 420 steels can be easily machined in their annealed state, but they are difficult to machine having a hardness greater than 30HRC. One of the most readily available machined alternatives is the free-machining grade 416 steels.
Welding
The martensitic class of stainless steels has limited weldability due to its hardenability. Special consideration is required to avoid cold cracking by preheating to 550°F (260°C). Post-weld heat treatment should be considered to achieve required properties. This particular alloy is generally considered to have poorer weldability than the most common alloy of this stainless class, Type 410. A major difference is higher carbon content for this alloy which requires both preheat and post-weld heat treatment. When a weld filler is needed, AWS E/ER 420, 410 NiMo and 309L are most often specified.
