HM21A-T81
HM21A-T81 properties and heat treatment forged piece, Including HM21A-T81 application and specifications, We have all specifications，Including HM21A-T81 steel plate, HM21A-T81 sheet, HM21A-T81 square steel, HM21A-T81 flat bar,HM21A-T81 round bar,HM21A-T81 forgings, we can own production and sales.
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We can produce the HM21A-T81 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.
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Chemical composition % of the ladle analysis of grade HM21A-T81 and Standards
| Physical Properties | Metric | English | Comments |
|---|---|---|---|
| Density | 1.78 g/cc | 0.0643 lb/in³ | |
| Mechanical Properties | Metric | English | Comments |
| Tensile Strength, Ultimate | 255 MPa | 37000 psi | |
| Tensile Strength, Yield | 210 MPa | 30500 psi | |
| Elongation at Break | 6.00 % | 6.00 % | in 50 mm |
| Modulus of Elasticity | 45.0 GPa | 6530 ksi | In Tension |
| Compressive Yield Strength | 180 MPa | 26100 psi | |
| Notched Tensile Strength | 260 MPa | 37700 psi | 60° V-Notch, root radius 0.0076 mm. |
| Ultimate Bearing Strength | 455 MPa | 66000 psi | |
| Bearing Yield Strength | 320 MPa | 46400 psi | |
| Poissons Ratio | 0.350 | 0.350 | |
| Machinability | 100 % | 100 % | Relative Rating, 100=Best |
| Shear Modulus | 17.0 GPa | 2470 ksi | |
| Shear Strength | 170 MPa | 24700 psi | |
| Electrical Properties | Metric | English | Comments |
| Electrical Resistivity | 0.00000500 ohm-cm | 0.00000500 ohm-cm | |
| Thermal Properties | Metric | English | Comments |
| Heat of Fusion | 343 J/g | 148 BTU/lb | |
| CTE, linear | 26.8 µm/m-°C @Temperature 0.000 - 100 °C |
14.9 µin/in-°F @Temperature 32.0 - 212 °F |
|
| 27.0 µm/m-°C @Temperature 20.0 - 200 °C |
15.0 µin/in-°F @Temperature 68.0 - 392 °F |
Estimated from similar Mg alloys | |
| Specific Heat Capacity | 1.00 J/g-°C | 0.239 BTU/lb-°F | |
| Thermal Conductivity | 135 W/m-K | 937 BTU-in/hr-ft²-°F | Estimated from trends in similar Mg alloys. |
| Melting Point | 605 - 650 °C | 1120 - 1200 °F | |
| Solidus | 605 °C | 1120 °F | |
| Liquidus | 650 °C | 1200 °F | |
| Processing Properties | Metric | English | Comments |
| Processing Temperature | 455 - 595 °C | 851 - 1100 °F | Hot Working |
| Annealing Temperature | 455 °C | 851 °F | |
| Component Elements Properties | Metric | English | Comments |
| Magnesium, Mg | 97.0 % | 97.0 % | As Remainder |
| Manganese, Mn | 0.45 - 1.10 % | 0.45 - 1.10 % | |
| Thorium, Th | 1.50 - 2.50 % | 1.50 - 2.50 % | |
Machining performance
Download HM21A-T81 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.