4140 Pre Hard Steel | 4140 Pre Hard Steel Bar | SAE 4140 Pre Hard Steel Plate

Product name

 4140 Pre Hard Steel | 4140 Pre Hard Steel Bar | SAE 4140 Pre Hard Steel Plate

keyword

 4140 steel round bar, 4140 Pre Hard Steel

Standard

AISI/ASTM/DIN/NF/JIS/GB/BS

Steel Grade

AISI 4140/ASTM 4140/DIN 1.7225 /NF 40CD4 /JIS SCM440 /GB 42CrMo /BS 708M40

Chemical Compositions(%)

C: 0.38-0.45   Si: 0.17-0.37  Mn: 0.50-0.80  P≤0.035  S ≤0.035  

Cr: 0.90-1.20  Mo: 0.15-0.25

Mechanical properties

Tensile strength σb (MPa): ≥1080(110)

Yield strength σs (MPa): ≥930(95)

Elongation δ5 (%): ≥12

Area shrinkage ψ (%): ≥45

Impact energy Akv (J): ≥63

Impact toughness value αkv (J/cm2): ≥78(8)

Hardness: ≤217HB

Sample size: sample blank size is 25mm

Surface treatment

Black/Peeling/Polishing/Machined

Technique

Cold/Hot rolled, Cold-Drawn or Hot Forged

Heat Treatment

Annealed; Quenched; Tempered

Delivery Condition

Hot Rolled or Forged/Peeled or Black Surface/Annealed or QT

Heat treatment standard

Quenching at 850℃, oil cooling; tempering at 560℃, water cooling, oil cooling

Metallographic structure

Tempered sorbite

Test

SGS/UT100%/Elements Testing

Certificate

SGS/ISO/Mill Certificate

Delivery status

Delivered in heat-treated (normalized, annealed or high temperature tempered) or unheated state

Skype/Whatsapp/Wechat

+86-18269260283

Company website

https://steelpurchase.com/

http://www.songshunsteel.com/