1. 42CrMo4 steel equivalent grade:
| Country | USA | German | British | Japan | China | Australia |
| Standard | ASTM A29 | DIN 17200 | BS 970 | JIS G4105 | GB/T 3077 | AS 1444 |
| Grades | 4140 | 1.7225/ | 42CrMo4 | SCM440 | 42CrMo | 4140 |
| 42crmo4 |
2. 42CrMo4 steel chemical composition:
| Standard | Grade | C | Mn | P | S | Si | Ni | Cr | Mo |
| ASTM A29 | 4140 | 0.38-0.43 | 0.75-1.00 | 0.035 | 0.04 | 0.15-0.35 | - | 0.8-1.10 | 0.15-0.25 |
| EN 10250 | 42CrMo4/ | 0.38-0.45 | 0.6-0.9 | 0.035 | 0.035 | 0.4 | - | 0.9-1.2 | 0.15-0.30 |
| 1.7225 | |||||||||
| JIS G4105 | SCM440 | 0.38-0.43 | 0.60-0.85 | 0.03 | 0.03 | 0.15-0.35 | - | 0.9-1.2 | 0.15-0.30 |
3. 42CrMo4 steel mechanical properties:
(Different Property canbe catched by adjusting Quenched and Temepering tempreture and time )
|
Yield Strength (MPa) |
Tensile Strength (MPa) |
Elongation |
Reduction of area |
AKV (J) |
|
930 min |
1080 min |
12% min |
45% min |
63 min |
4. 42CrMo4 steel applications:
high strength stud bolt, threaded rods, wind power bolt, prestressed anchor bolts, post stressed anchor bolt, steel tie rod, tie bar, tension rod, tension bar etc. Shaft, axle shaft, crankshaft, shaft for sleeve, linear shaft, pump shaft, rotor shaft, sensor shaft, spline shaft, drive shaft, mandrel shaft, transmission shaft, screw rod etc. CNC machines, precision CNC machines etc. Ejector pins and Ejector rods
5.Supply Size range
| Delivery condition | Diameter ranges |
| Hot tolled | M12-M310 |
| Hot rolled+Q&T(Quenched and tempered) | M12-M310. |
| Cold drawn +Q&T(Quenched and tempered) | M10-M100 |
| Peeled / Peeled+Q&T | M10-M100 |
| Forged/Forged+Heat treatment. | M250-M1000 |
6.Product Features:
1. High strength and toughness.
2. Great property of quenching and can be deep hardened.
3. Less tempering brittleness tendency.
4. Great machining performance under high temperature and nice appearance after machining.
5. Good performance in weld ability.
6. Excellent performance in impact absorption, such as where the hammer may bounce back and has barely any damage caused upon impact.
| Special Steel Round Bar | Grade |
Spec |
Dimension |
Steel Grade |
Application industry |
| Quality carbon structural steel | GB/T699 JIS G 4051 ASTM A29 SAE,EN10083 (Others) | 12-260 | 10# ,20#,45#, 65Mn,SAE1080,S45Cetc | ,,,For Manufacturing of All Kinds of Bearing Parts, Connecting Rod. Rigging Metal Tools etc. |
|
| Low alloy high-strength steel | GB/T1591,(Others | 13-260 | Q355 series,Q460Cetc | ,, Mechanical,Car,Engineering machinery | |
| Alloy structural steel | GB/T3077,JIS,ASTM A29, EN10083,(Others) | 13-260 | 20Mn2-45Mn2,25MnV,27SiMn-42SiMn,20Cr-40Cr,12CrMo-42CrMo,20CrMn,40CrMn,SCr420,SCr440,SCM420,SCM440,41Cr4,20CrMoA,30CrMoA,20Cr2MoA,20CrNiMo,20Cr2Ni4A,SAE4340,20Cr2Ni4A,30CrMnSiA etc | ,,, Mechanical,Car,Bridge,Petrochemical industry | |
| Bearing steel | GB/T 18254,(Others) | 14-200 5-25 wire rod and cold drawn wire |
GCr15,GCr15SiMn,C&U1,C&U2,GCr15-JN,SCP52100,SCPSS52100,GCr15S700,100CrMn6,SUJ2,SUJ2S1,SAE1055,S55C,G20CrNiMoA(SAE8620),GCr15etc | ,,, Mechanical ,Car ,Electric machinery,Engineering machinery etc | |
| Spring Steel | GB/T1222,JIS,SAE,EN,(Others) | 13-120 | 60Si2MnA,60Si2CrA,60Si2CrVA,55CrMnA,50CrVA,SUP9, SUP9A ,SUP11A, 55Cr3 ,51CrV4 ,52CrMoV4 ,SAE5160 SAE6150 ,SAE9254, 60SiCrVAT, 52CrMoV4 ,55SiCr etc | ,, Car,High Speed railway,Locomotive |
|
| Round billet | 300mm-600mm ( According to the different requirement) | ||||
| Large section bar | 80mm-350mm ( According to the different requirement) | ||||
| Forging | 180mm-1500mm ( According to the different requirement) | ||||
1.What is a round bar used for?
Round bar is a steel bar with a smooth surface which is used for construction that does not request high-strength reinforced concrete works. It is widely used on beam and column stirrups, pipelines, roads, small and medium-sized projects.
2.What is the difference between a round bar and a rod?
Round bars range from 1/8 to 6 inches in diameter, while rods are finer, from 1/16 inches to 1 inch. Each metal has different uses and requires specific crafting techniques, resulting in varying sizes.
3.What is the purpose of a bar?
Bars and pubs are more than places to grab a drink-they're cornerstones of connection and culture. From fostering friendships to supporting local economies, these establishments play a vital role in shaping the social and economic fabric of our communities.
4.What is the difference between a round bar and a hex bar?
Round bars perform well in rotating applications and machining; hex bars provide superior grip and torque transmission, while square bars offer excellent structural stability and easy fabrication. Each shape serves separate industrial purposes across automotive, aerospace, pharmaceutical, and engineering sectors.
5.Is rebar stronger than steel rod?
Reinforced steel or steel rebar is better than steel in a lot of ways. Given the additional elements in it, there is a lot it can do and withstand, which is better compared to steel. For instance, it is non-corrosive. Steel rebar, unlike steel, can last up to a hundred years without losing its molecular integrity.