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SAE J770

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SAE J770 properties and heat treatment forged piece, Including SAE J770 application and specifications, We have all specifications,Including SAE J770 steel plate, SAE J770 sheet, SAE J770 square steel, SAE J770 flat bar,SAE J770 round bar,SAE J770 forgings, we can own production and sales.


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We have the advantages of equipment, technologies and price

forged/hot rolling/ extrusion of steel


We can produce the SAE J770 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.

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Chemical composition % of the ladle analysis of grade SAE J770 and Standards

AISI 50B40 steel
Categories: Metal; Ferrous Metal; Alloy Steel; AISI 5000 Series steel; Low Alloy Steel; Carbon Steel; Medium Carbon steel

Key Words: UNI 38 CrB 1 KB (Ital.), medium carbon steels, UNS G50401, ASTM A322, ASTM A519, SAE J404, SAE J412, SAE J770, DIN 1.7007

Physical Properties Metric English Comments
Density  7.85 g/cc 0.284 lb/in³
 
Mechanical Properties Metric English Comments
Hardness, Brinell  174 - 223 174 - 223 annealed and cold drawn.
Hardness, Knoop  221 221 Converted from Brinell hardness.
Hardness, Rockwell B  92 92 Converted from Brinell hardness.
Hardness, Rockwell C  13.0 13.0 Converted from Brinell hardness. Value below normal HRC range, for comparison purposes only.
Hardness, Vickers  208 208 Converted from Brinell hardness.
Modulus of Elasticity  205 GPa 29700 ksi Typical for steel
Bulk Modulus  140 GPa 20300 ksi Typical for steel.
Poissons Ratio  0.290 0.290 Calculated
Machinability  65 % 65 % annealed and cold drawn. Based on 100% machinability for AISI 1212 steel.
Shear Modulus  80.0 GPa 11600 ksi Typical for steels.
 
Electrical Properties Metric English Comments
Electrical Resistivity  0.0000219 ohm-cm 0.0000219 ohm-cm Typical 5000 series steel
 
Thermal Properties Metric English Comments
Specific Heat Capacity  0.475 J/g-°C 0.114 BTU/lb-°F Typical 4000 series steel
Thermal Conductivity  46.6 W/m-K 323 BTU-in/hr-ft²-°F Typical steel
 
Component Elements Properties Metric English Comments
Boron, B  0.000500 - 0.00300 % 0.000500 - 0.00300 %
Carbon, C  0.380 - 0.430 % 0.380 - 0.430 %
Chromium, Cr  0.400 - 0.600 % 0.400 - 0.600 %
Iron, Fe  97.592 - 98.3195 % 97.592 - 98.3195 % As remainder
Manganese, Mn  0.750 - 1.00 % 0.750 - 1.00 %
Phosphorous, P  <= 0.0350 % <= 0.0350 %
Silicon, Si  0.150 - 0.300 % 0.150 - 0.300 %
Sulfur, S  <= 0.0400 % <= 0.0400 %

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M504AA / 8029
 




Machining performance

Download SAE J770 the mechanical properties of the report, the report provides detailed performance analysis and application. Download >>


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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