DIN 42CrMo4 1.7225,ASTM 4140 High Tensile Steel Bar
DIN 42CrMo4 1.7225 ASTM 4140 Hot Rolled High Tensile Steel Bar, generally supplied hardened and tempered to Condition “T” in sections up to 100mm, with a tensile strength of 850 – 1000 MPa and aiming for this strength range in larger sections. It offers a very good balance of strength, toughness and wearresistance.
Alloyed heat treatable steel with a typical tensile strength of 900 -1200 N/mm². For automotive and aircraft components with high toughness as axle journals, gears, tyres, push rods. And Axles, conveyor parts, crow bars, gears, logging parts, spindles, shafts, sprockets, studs, pinions, pump shafts, rams, ring gears, etc.
ASTM A29 Standard for Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements.
All Grades Comparison
ASTM EN JIS GB
4140 42CrMo4/1.7225 SCM440TK 42CrMo
Steel Grade C Si Mn P S Cr Mo
4140 0.38-0.43 0.15-0.35 0.75-1.00 0.040 max 0.040 max 0.80-1.10 0.15-0.25
42CrMo4 0.38-0.45 0.40 max 0.60-0.90 0.025 max 0.035 max 0.90-1.20 0.15-0.30
SCM440TK 0.38-0.43 0.15-0.35 0.60-0.90 0.030 max 0.030 max 0.90-1.20 0.15-0.30
42CrMo 0.38-0.45 0.17-0.37 0.50-0.80 0.030 max 0.030 max 0.90-1.20 0.15-0.25
|Diameter(mm)||Tensile Strength Rm (Mpa)||Yield Strength R2 (Mpa)||Elongation in 2 in or 50 mm A(%)||Reduction of area (%)||Impact Energy Joules (-20°C)|
|16 max||1100-1300||900 min||10 min||40 min||30 min|
|16-40||1000-1200||750 min||11 min||45 min||35 min|
|40-100||900-1100||650 min||12 min||50 min||35 min|
|100-160||800-950||650 min||13 min||50 min||35 min|
|160-320||750-900||500 min||14 min||55 min||35 min|
Forging: Heat to 1150°C Hold until uniform.Minimum forging temperature 850°C. Cool slowly in ashes or sand etc.
Annealing: Heat to 830°C – 850°C. Cool in furnace.
Normalising: Heat to 870°C – 900°C. Cool in still air.
Annealed: Heat to 600°C – 650°C.
Hardened: Heat to 500°C – 550°C. Cool in still air.
Hardening: Heat to 830°C – 880°C. Quench in oil or polymer.
Tempering: Heat to 450°C – 700°C cool in still air.
3,000 ton per month.
Chemical Composition, Mechanical Property, Hardness testing, Ultrasonic testing, Magnetic testing, Metallographic, Dimension and Surface.
Each bundle of max 3,000kg with several steel strips, Two tags on each bundle.
Mill’s Test Certificate
EN 10204/3.1 with all relevant data reg. chem. composition, mech. properties and results of testing.