4140 Alloy Steel Products AISI 5140 4130 Steel Square Bar 41Cr4 SCr440

Place of Origin Jiangsu,China
Certification ISO 9001 ,CE
Minimum Order Quantity 1 PCS
Delivery Time 7~10 working days
Payment Terms L/C, T/T, Western Union
Supply Ability 5000 Ton/Tons per Month
Product Details
Product Name Alloy Steel Sheet Heat-treatment +A,+N,+NT,+QT
Thickness 3mm~1500mm Surface Black,Grounded,Peeled/Turned,Polished
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4140 alloy steel Products

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AISI 4130 steel square bar

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41cr4 bar

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Product Description
AISI 5140/41Cr4/SCr440 Alloy Steel Sheet

AISI 5140 alloy steel is a structural alloyed carbon steel accding to AISI/ASTM standard which is widely used in Low and moderately stressed parts for vehicles, engines and machines where hard, wear resisting surface is needed. The hardness as surface hardened is about 54 HRC.

 

CHEMICAL COMPOSITION

 

Element C Mn Si P S Mo
4140 0.38~0.43% 0.75~1.0% 0.15~0.30% 0.035% 0.04% 0.15~0.25%
4130 0.28~0.33% 0.70~0.90% 0.15~0.35% 0.035% 0.04% 0.15~0.25%
5140 0.38~0.48% 0.70~0.9% 0.15~0.35% 0.035% 0.04% -

 

HEAT TREATMENT OPTION

  • +A: Annealed (full/soft/spheroidizing)
  •  +N: Normalized
  • +NT: Normalized and tempered
  • +QT: Quenched and tempered (water/oil)

 

FABRICATION AND HEAT TREATMENT

 

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.

 

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.

 

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.

 

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.

 

Soft Annealing
Heat to 680-720℃, cool slowly. This will produce a maximum 5140 hardness of 241HB (Brinell hardness).

 

Tempering
Tempering temperature: 540-680℃.

 

Noramlizing of steel grade 5140

Temperature: 840-880℃

 

Hardening
Harden from a temperature of 820-850, 830-860℃ followed by water or oil quenching.