Shanghai Jieteng Precision Mold Factory
Shanghai Jingteng Metal Group Co., Ltd.
440B Stainless Steel
China JT Metal is the supplier of 440B stainless steel round bar, diameters. A high carbon high chromium type combining stainless steel properties with excellent hardness after heat treatment. 440B is very similar to the 440C grade but with a slightly lower carbon content, it attains a lower hardness than 440C but has slightly better corrosion properties. Its corrosion resistance properties are similar to 410 stainless steel, with optimum corrosion resistance of 440B achieved with a temper below 400°C. For 440B to achieve best corrosion resistance all surfaces must be free of scale, foreign particles, lubricants and coatings applied for drawing and heading. With its high carbon content 440B stainless steel annealed bar has similar machining characteristics to a high speed steel annealed grade.
We welcome export enquiries for stainless steel. Contact our sales office and consult our shipping policy for further details.
Related Specifications
1.4112 X90CrMoV18 ASTM A276 UNS S44003 AISI
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| Form of Supply |
China JT Metal is the supplier of round bar. Diameters can be sawn to your required lengths as one offs or multiple cut pieces. We also offer 440B flat cut from large block. Pieces can be bandsaw cut to flat and square sections to your bespoke sizes. 440B ground steel bar can be supplied, providing a high quality precision bar to tight tolerances. |
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| Applications |
Suitable for applications requiring a combination of excellent wear resistance with moderate corrosion resistance. 440B stainless steel is commonly used in the oil, gas, marine, food and medical industries. Typical applications include valve components, knives, bearings, surgical tools and cutlery. |
| Forging |
Heat slowly and uniformly to 1180°C, allowing sufficient time for the steel to become heated through. Be careful not to overheat as this can cause a loss of toughness and ductility. Do not forge below 1010°C reheating if necessary. After forging cool slowly in furnace or thermoinsulating material, then anneal immediately. Air cooling after forging 440B may cause cracking. |
| Annealing |
Heat uniformly to 840-875°C. Soak and cool very slowly in the furnace. |
| Hardening |
Heat the 440B to 1010-1070°C, fully soak and quench in warm oil or air cool. Be careful not to overheat or full hardness will not be obtained. |
| Tempering |
When tempering 440B a Rockwell hardness of 58 HRc can be obtained. Temper for at least one hour. Tempering above 400°C is not recommended as this can cause a reduction in corrosion resistance and impact properties.
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| Heat Treatment |
Heat treatment temperatures, including rate of heating, cooling and soaking times will vary due to factors such as the shape and size of each component. Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities. Please consult your heat treatment provider for full guidance on heat treatment of 440B stainless steel. |
| Typical Mechanical Properties* |
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| Certification |
Stainless steel 440B grade is available with BS EN 10204 3.1 mill certificate, please request when placing any orders. |
| Quality Assured Supply |
440B stainless steel is supplied in accordance with our ISO 9001 : 2008 registration. |
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Contact China JT Metal with your enquiries for 440B stainless steel round bar. |
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| Email: sales@sh-jieteng.com |
Old factory site: No.228 Sifeng Road, Songjiang district. ShanghaiShanghai office center : No. 655, High Tech Road, Songjiang District, Shanghai
Japanese warehousing and material control department: No. 38, Deborah Road ，Waigaoqiao Free Trade Zone，China (Shanghai) Free Trade Experimental Zone
Japan general office: Yamaguchi Prefecture light Chuo six 1-1-1, No. 19
Rp: enterprise operator: 86-021-57611748 fax 86-021-57612426 group's official website: www.sh-jieteng.com Shanghai ICP for: no. 1021431