Industrial Forged Tool Alloy Steel Round Bar Open Die Forged Customized Length
|Place of Origin:||China|
|Certification:||ISO9001, ISO10012, ISO14001, OHSAS18001, ABS, BV, DNV, Lloyd, NK|
Payment & Shipping Terms:
|Minimum Order Quantity:||5 metric tons|
|Packaging Details:||Seaworthy package for export|
|Delivery Time:||60 days|
|Payment Terms:||L/C, T/T|
|Supply Ability:||5000 metric tons per month|
|Material:||Alloy Steel||Process:||Cold Drawn|
|Shape:||Round||Length:||Cut To Length On Request|
cold rolled steel bar,
cold bending steel rod
52100 cold drawn bearing alloy steel round bar
52100 is a high carbon, chromium containing low alloy steel that is through hardening and noted in particular for use as bearings.
Principal applications are those for bearings in rotating machinery.
Machinability of 52100 alloy is good by conventional methods. A spherodizing anneal at 1200 F before machining will improve the overall machinability of the alloy.
52100 may be formed by all conventional methods, including cold forging or stamping and hot or cold upset forming.
This is a high carbon alloy typically used in bearing applications where welding is not applicable or appropriate.
Heat treatment consists of heating to 1500 F followed by an oil quench for through hardening of the alloy. A normalizing heat treatment at 1600 F and slow cooling, to relieve machining stress, may be employed prior to the 1500 F and quench treatment.
The alloy may be supplied as forgings and also may be subsequently forged at 2200 F down to 1700 F
Hot working, such as upsetting, may be done in the range of 400 to 1000 F.
The alloy has good ductility and may be cold worked in the annealed or normalized conditions by conventional methods.
Anneal at 1600 F and slow cool to relieve machining or cold working strains.
Not applicable to this alloy.
Temper at 400 F.
The alloy hardens from cold working or by heating and quenching - see "Heat Treatment". It also may be carburized at 1675 F and quenched after sufficient time for carburization. A second heating to 1450 F and second quench from that temperature should be used.
Bar size: dia. 40-150mm
Orders for material under this specification should include the following information:
2 Grade identification,
3 Specification designation and year of issue,
4 Dimensions, and
5 Supplementary requirements, if included.
The steels covered by this specification shall have the capability of showing a fine fracture grain size (approximately ASTM No. 8 in accordance with Test Methods E112) when quenched from normal austenitizing temperatures not exceeding 1550°F [840°C].
Decarburization and Surface Imperfections
Decarburization and surface imperfections shall not exceed the limits specified in Tables 4 and 5. Decarburization shall be measured using the microscopical methods described in Test Methods E1077.
When annealing is specified in the order, the structure shall be rated and reported in accordance with Guide A892 as follows:
Carbide Size (CS)—As the appropriate carbide size is dependent on application, the limits shall be as agreed upon between manufacturer and purchaser.
Carbide Network (CN)—As the network is influenced by section size, the limits shall be as agreed upon between manufacturer and purchaser.
Lamellar Content (LC)—52100 steels shall have a lamellar content not to exceed LC1. Lamellar content of other compositions shall be as agreed upon between manufacturer and purchaser.
The material shall be free from excessive carbide segregation.
When annealing is specified in the order, the steel shall have a completely spheroidized microstructure and a hardness as specified in Table as below.
|Product||Condition||Hardness, Brinell, max.|
|Bars||Hot rolled, annealed||207|
|bars||Annealed, cold drawn||248|
Small sizes where Rockwell B scale hardness readings are impractical shall have a maximum tensile strength of 110 000 psi [760 MPa].
Hardness and tensile tests shall be in accordance with test methods described in Test Methods and Definitions A370.
Product size range
Diameter: 40mm - 150mm
Length: on request