SCM420
SCM420 properties and heat treatment forged piece, Including SCM420 application and specifications, We have all specifications，Including SCM420 steel plate, SCM420 sheet, SCM420 square steel, SCM420 flat bar,SCM420 round bar,SCM420 forgings, we can own production and sales.
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forged/hot rolling/ extrusion of steel
We can produce the SCM420 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 SCM420 and Standards
Brand: SCM420/20 CrMo
Standard GB/T 3077 1988
Corresponding Standard: G4053 JIS: 2003
ASTM A29M: 2005
ISO 683-it 96
Unified digital code: A30202
Chemical ingredients:
C ：0.17～0.24
Si：0.17～0.37
Mn：0.40～0.70
S ：≤0.035
P ：≤0.035
Cr：0.80～1.10
Ni：≤0.030
Cu：≤0.030
Mo：0.15～0.25
Mechanical properties: tensile strength sigma b (MPa) : 885 (90) : the yield strength sigma s (MPa) : 70 () : 685 delta 5 (%) elongation quartile: 12 section ψ (%) : shrinkage: 50 impact energy Akv (J) : acuity 78 impact toughness values alpha kv (J/cm2) : 98 (10) : more than 197 HB hardness: sample size: sample blank dimensions for 15 mm standard and metallographic organization took heat treatment: heat treatment Standard: 880 ℃, water cooling, quenching oil cold; Tempering 500 ℃, water, oil, and cold. State: to heat treatment had delivery (is fire, annealed or high temperature tempering) or not heat treatment delivery, delivery status should state clearly in the contract.
Machining performance
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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.