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GB Standard Alloy Round Bar

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Description

Round Bar
Specifications
· Grade: Alloy steel
· Standard: AISI, ASTM, BS, DIN, GB, JIS
· OD：10-500mm
· Thickness: Max:800mm
· Width: 205mm~2300mm
· Length: 1000mm~6000mm
· Place of Origin: China (Mainland)
· Model Number: 1.7220 / SCM430 / 30CrMo4 / 4130 ; 4140/42CrMo4/1.7225; En24 34CrNiMo6 1.6582 4340.
· Application: Mould steel
· Technique: Forged
· Special Use: Mold Steel ,Statically and dynamically stressed components for vehicles, engines and machines. For parts of larger cross-sections, crankshafts, gears.
· Shape: Round bars/Flat bar/Plate
· Technology: Hot Rolled/Forged/Clod Draw
· Heat treatment: Annealing/Q+T
· Surface treatment:Black/Peeling/Polishing/Machined
· Delivery condition: Hot rolled or forged/ Peeled or black surface/annealed or QT
· Customer& acute;s logo: Available
· Test: SGS/UT100%/Elements testing
· Certificate: ISO/Mill certificate
· Experience: Ten years manufacturer experience
Chemical composition
Standard Number C Mn Si Cr Mo P S Ni
GB 42CrMo 0.38~0.45 0.50~0.8 0.17~0.37 0.9~1.2 0.15~0.25 ≤0.035 ≤0.035 ≤0.3
AISI 4140 0.40~0.45 0.75~1.0 0.15~0.35 0.8~1.1 0.15~0.25 ≤0.035 ≤0.040 　
GB 40CrNiMoA 0.37~0.44 0.17~0.37 0.50~0.80 0.6~0.9 0.15~0.25 ≤0.035 ≤0.035 1.25~1.65
AISI 4340 0.38~0.43 0.15~0.35 0.60~0.80 0.7~0.9 0.20~0.30 ≤0.035 ≤0.040 1.65~2.00

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