440 Stainless Steel Bar
Description
Technical Parameters
Introduction
440 stainless steel bar is a highly popular option among blade manufacturers around the world. This premium steel is a modified form of 440B steel and boasts a carbon content of 0.9% and 18% chromium, making it one of the best options for crafting durable and reliable blades. With its excellent corrosion resistance and toughness, 440 stainless steel bar is the go-to choice for many professionals in the knife-making industry. Whether you're a seasoned pro or a beginner just starting out, this steel is sure to provide you with the high-quality performance you need to create exceptional knives that will stand the test of time.
Chemical Composition (%) | |||||||||
Steel Grade | C | Si (≤) | Mn (≤) | P (≤) | S (≤) | Ni (≤) | Cr | Mo | V |
440 | 0.85-0.95 | 0.80 | 0.80 | 0.04 | 0.03 | 0.60 | 17.00-19.00 | 1.00-1.30 | 0.07-0.12 |
Mechanical Properties
The hardness of a 440 stainless steel bar is at least 55 HRC after it has been quenched and tempered. This means that the bar has undergone a process where it is rapidly cooled and then heated to a specific temperature to achieve the desired hardness.
Material hardness: ≤269 HBW (Annealed)
Physical Properties
Density (g/cm3): 7.70
Specific heat capacity (J/Kg·K): 460 at 0-100℃
Thermal conductivity (W/m·K): 29.3 at 100℃
Coefficients of linear thermal expansion (10-6/K):
10.5 (0-100℃)
12.0 (0-500℃)
Electrical Resistivity (μΩ·m): 0.65 at 20℃
At a temperature of 20℃, the longitudinal modulus of elasticity measures 211 kN/mm2. If we rephrase the given information in a similar manner, it would be as follows: The longitudinal modulus of elasticity is recorded as 211 kN/mm2 when the temperature is 20℃.
Typical Heat Treatment Specification
For steel bar
Annealing: 800 – 920 ℃ (Slow cooling)
Quenching: 1050 – 1075 ℃ (Oil cooling)
Tempering: 100 – 200 ℃ (Air cooling)
440 steel is a widely used material in various industries, and its equivalents are listed below for your reference. In the United States, it corresponds to ASTM, AISI, and SAE standards. In Europe, it is known as Germany DIN, while in Britain, it is referred to as BS. In France, it is recognized as NF, and in Japan, it goes by JIS. Finally, it aligns with the ISO standard as well. These various equivalents ensure that 440 steel is usable worldwide and can be applied appropriately in different settings.
9Cr18MoV stainless steel equivalent | |||||||||
China | USA | Germany | Japan | France | |||||
Standard | Grade | Standard | Grade | Standard | Grade (Steel number) | Standard | Grade | Standard | Grade (Steel number) |
GB/T 1220 | 9Cr18MoV | AISI, | 440B, | DIN EN 10088-3; | X90CrMoV18 (1.4112) | JIS G4303 | SUS 440B | NF EN 10088-3 | X90CrMoV18 (1.4112) |
Production Market
Our 440 stainless steel bars are exported to customers in Southeast Asia, East Asia, South Asia and other countries and regions in Asia, North America and South America.
Quality inspection before delivery
FAQ
Q: Why choose us?
A: We have professional team, service and inpection.
Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock.
Or it is 15-20 days if the goods are not in stock, according to quantity.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer sample for free charge, but freight cost collected.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact us .
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