AISI 1566 is a type of high manganese spring steel, is characterized by high elastic limit, yield strength and fatigue strength, with large hardenability and small decarbonization tendency. It has good machinability and relative machinability of 70% in the annealing state, but it is sensitive to overheating, easy to produce quenching cracks and temper brittleness. AISI/ASTM 1566 is used for making large flat spring, cushion spring and spring, and it is also suitable for making spring ring, valve spring, clutch spring, brake spring cold drawn wire (≤7mm), cold coil spring, etc. It is also the main material for making a diamond circular saw blade.
Specifications: ASTM A689, ASTM A29
Size:5.5-250mm
Heat treatment: Quenching 830℃ in oil; Tempering 540℃
Relevant standard：
ASTM A689, ASTM A29 1566
JIS SUP3
GB/T 1222, GB/T 699 65Mn
Chemical composition(ASTM A689)
standards
C
Si
Mn
P
S
AISI 1566
0.60~0.71
—
0.85~1.15
≤0.04
≤0.05
Physical property
Tensile strength (MPa)
Yield strength (MPa)
Elongation (%)
Hardness
≥980
≥785
≥8
≤302（Hot rolled）
Spring steel refers to the steel specially used for making springs and elastic elements. The elasticity of steel depends on its capacity of elastic deformation, that is, the capacity of elastic deformation within the specified range makes it bear a certain load after the load is removed, there is no permanent deformation.
LY METAL is a professional supplier of alloy steel rods and bars. We manufacture and distribute high-quality steel 1566 round bar for spring application in accordance with ASTM A29 and ASTM A689 standards, specified delivery conditions and final customer specifications for industrial and commercial applications. Special sizes of steel bars and delivery issues can be further negotiated and we provide a wide range of solutions for purchasing departments to select alternative grades, contact us today!
We can produce the AISI 1566 has the following specifications:
Round bar steel: 1mm to 3000mm
Square-shape steel: 1mm to 2000mm
Plate steel:0.1mm to 2500mm
Width: 10mm to 2500mm
Lenth: We can supply any lenth based on the customer's requirement.
Forging: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes
Tubings: OD: φ6-219 mm, with wall thickness ranging from 1-35 mm.
Finished goods condition: hot forging/hot rolling + annealing/normalizing + tempering/quenching + tempering/any conditions based on the customer's requirement
Surface conditions: scaled (hot working finish)/ground/rough machining/fine machining/based on the customer's requirement
Furnaces for metallurgical processing: electrode arc + LF/VD/VOD/ESR/Vacuum consumable electrode.
Ultrasonic inspection: 100% ultrasonic inspection for any inperfections or based on the customer's requirementExcellent service for all kinds of industries,with advantages of technologies, equipment and price.
We serve you with our honesty, integrity, and professionality.
Machining performance
Download AISI 1566 the mechanical properties of the report, the report provides detailed performance analysis and application.
Principal Design Features
One of the most widely used precipitation hardening grades in the business. While soft and ductile in the solution annealed condition, it is capable of high properties with a single precipitation or aging treatment. Characterized by good corrosion resistance, high harness, toughness and strength.
Machinability
Long, gummy chips characterize this alloys machinability. It can be machined in the annealed condition, however condition H1150M will yield best results. Post machining solution treatment of parts will be required prior to final hardening if machining in this condition.
Heat Treatment
CONDITION A--Soak at 1900 F (1038 C) for 30 minutes and cool below 60 F (16 C) for complete martensite transformation. CONDITION H 950- Treat Condition A material at 900 F(482 C) for 1 hour, air cool.. CONDITION H925, H1025, H1075, H1100, H1150- Soak solution treated material for 4 hours at specified temperature, air cool, CONDITION H1150M- Soak solution treated material at 1400 F (760 C) for 2 hours, air cool, then re-heat to 1150 F (620 C) for 4 hours and air cool.
Welding
Successfully welded by common fusion and resistance methods, this alloy should not be joined by oxyacetylene welding. AWS E/ER630 filler metal is recommended if required.
Forging
Soak for 1 hour at 2150 F (1177 C) prior to forging. Do not work below 1850 F (1010 C). Post-work solution treatment is required prior to final hardening.
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