Gnee Super Alloy (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of s31803 stainless duplex steel flat/round bar in China. If you're going to wholesale high quality s31803 stainless duplex steel flat/round bar made in China, welcome to get free sample from our factory. Good service and reasonable price are available.

S31803 Stainless Duplex Steel Flat/Round Bar

Hot Working:Hot working for grade 440B stainless steel takes place by pre-heating the steel to 760°C (1400°F) which is then followed by slowly increasing the temperature range to 1038-1204°C (1900-2200°F). After the hot working process, the material is then cooled slowly at room temperature followed by complete annealing.
Cold Working:440B stainless steel can be slightly cold worked by common cold working methods.
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:440B stainless steel is annealed at 843-871°C (1550-1600°F) and then cooled very slowly in a furnace.
Hardening:440B stainless steel is heated at 760°C (1400°F), soaked at 1010°C (1850°F) and finally cooled in oil or air.
Tempering:440B stainless steel is tempered at 148°C (300°F) to obtain maximum properties and the maximum hardness that can be obtained is RC58.

FAQS:
Q:How to get a formal effective quotation?
A:According to your required specification, such as material(Article) ,main dimension, and the quantity you need, we will provide a formal effective quotation within a working days.
Q:How to deal with the parts received when they are found to be in poor quality?
A:Please rest assured that all our products are QC inspected completely and accepted with inspection report before delivery.Generally there will no non-conformance.In case of non- conformance, and the errors identified was caused by us, we will arrange to repair or make right parts for you.
Q:What is the MOQ?
A:Usually we don't set MOQ, but the more, the cheaper.Besides, we are happy to make prototype or sample for clients to ensure quality standard.
Q:Whether some samples can be provided ?
A:Yes, just need some sample cost, we will return it back when proceed into mass production.
Q:If we can not find what we want on your website, what should we do?
A:You can email us the descriptions and pictures of the products you need, we will check whether we have them.We develop new items every month, and some of them have not been uploaded to website in time.Or you can send us sample by express, we will develop this item for bulk purchasing.

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