Categories | Stainless Steel Bar |
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Brand Name: | UST |
Model Number: | X90CrMoV18 |
Certification: | ISO 9001:2008 |
Place of Origin: | CHINA |
Dimensions:: | Dia12~420mm |
Place of Origin:: | Jiangsu, China |
Delivery Condition:: | Hot Rolled, Forged, Annealed,Quenched and Tempered |
HS Code:: | 7228100000 |
Certification:: | ISO, SGS |
Application:: | oil, gas industries |
Company Info. |
SHANGHAI UNITE STEEL |
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440B stainless steel is a high carbon martensitic stainless steel containing good strength, moderate corrosion resistance and ability to obtain and maintain wear resistance and excellent resistance.
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.
All Grades Comparison | |||
ASTM | DIN | UNS | EN |
440B | 1.4112 | S44003 | X90CrMoV18 |
Chemical Composition(%) | ||||||||
Steel Grade | C | Si | Mn | P | S | Cr | Mo | V |
440B | 0.75-0.95 | 1.0 max | 1.0 max | 0.040 max | 0.030 max | 16.0-18.0 | 0.75 max | / |
1.4112 | 0.85-0.95 | 1.0 max | 1.0 max | 0.040 max | 0.030 max | 17.00-19.00 | 0.90-1.50 | 0.07-0.12 |
Hardness (HB):265max
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.
Welding: Welding is not generally recommended for grade 440B
stainless steel as it tends to harden in air. If this steel grade
is welded the recommended temperature is 260°C (500°F) and for the
post weld treatment the recommended temperature is 732-760°C
(1350-1400°F). The post weld treatment should take place for 6 h
and then the material should be cooled slowly in a furnace to avoid
cracking. Similar high heat inputs and filler metal should be used
during operations.
Machinability: 440B stainless steel is best machined in the
annealed condition. Chip breakers are used to handle tough, stringy
chips of grade 440B stainless steel. Ceramic or carbide tooling is
best suited for this grade 440B stainless steel.
EN 10204/3.1 with all relevant data reg. chem. composition, mech. properties and results of testing.
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