BS EN 42CrMo4 Black Surface Alloy Steel Seamless Pipes With High Strength And Hardenability

Place of Origin China/Japan
Brand Name BEST
Certification API, CE, PED, ISO
Model Number 1/2''-48''
Minimum Order Quantity Negotiation
Price Negotiation
Packaging Details Pipes May be furnished bard or coated and with capped ends
Delivery Time 5-8 working days
Payment Terms L/C /TT
Supply Ability 10000ton/Month

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Product Details
Thickness 10mm-1500mm Surface Condition Black, Rough Machined, Peeled
Standard BS , EN10250 Specific Qualification TUV:AD WO-TRD100 / PED97/23/EC /IBR
Test Heat Analysis/Tensile Test/Impact Test /NDE/PMI OD Tolerance ±1% Or ±0.5mm , Whichever Is The Greater
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Product Description

Name : BS EN 42CrMo4 Chrome plated alloy seamless steel Pipes , It has higher strength and hardenability 



BS EN 42crmo4 Alloy Steel is a common chromium-molybdenum steel that usually used after quenched and tempered, with high intensity, high hardenability. BS EN 42CrMo4 round steel has better performance than 34CrMo4 steel due to the carbon and chromium content is higher. 42CrMo4 alloy steel has higher strength and hardenability. The 42CrMo4 alloy material also has high fatigue strength and good low-temperature impact toughness .The temper brittleness is not obvious



Although 42CrMo4 steel is more expensive than 41Cr4 steel, it is more preferable in terms of material properties. EN 42CrMo4 alloy engineering steel materials have been widely used in automotive driving elements. Otai Steel is able to supply you prime quality of 42CrMo4 alloy steel materials with wide range.


1. 42CrMo4 Alloy Steel Supply Range


42CrMo4 Round bar Sizes: 10mm – 3000mm
Steel 42CrMo4 Flat and Plate: 10mm-1500mm thickness x 200-3000mm width
Other steel shape and sizes available according to your requirements.

Surface condition: Black, rough machined, peeled, turned or other requirements according to your requirements.

                                              BS EN 42CrMo4 Black Surface Alloy Steel Seamless Pipes With High Strength And Hardenability 0


2. BS EN 42CrMo4 Alloy Steel Relevant Specifications and Equivalents


BS EN 10250 Material No. DIN ASTM A29 JIS G4105 BS 970-3-1991 BS 970-1955 AS 1444 AFNOR
42CrMo4 1.7225 38HM 4140 SCM440 708M40 EN19A 4140 42CD4


3. 42CrMo4 Alloy Steel Chemical Composition


42CrMo4/1.7225 C Mn Si P S Cr Mo
0.38-0.45 0.60-0.90 0.40 max 0.035 max 0.035 max 0.90-1.20 0.15-0.30


4. DIN 42CrMo4 Alloy Steel Mechanical Properties


Size Ø mm Yield stress
Rp0.2,N/nn2, min.
Ultimate tensile Stress,
A5,%, min.
Hardness HB Toughness
KV, Joule, min.
<40 750 1000-1200 11 295-355 35 at 20ºC
40-95 650 900-1100 12 265-325 35 at 20ºC
>95 550 800-950 13 235-295 35 at 20ºC


5. Heat Treatment of 42CrMo4 Steels


Annealing of 42CrMo4 Steels

  • Heat steel 42CrMo4 forged steel slowly and thoroughly to 800-850°C;
  • Cool slowly in the furnace to the temperature 480°;
  • Complete annealing the steel in the air.


                                           BS EN 42CrMo4 Black Surface Alloy Steel Seamless Pipes With High Strength And Hardenability 0


Quenched and Tempered (Q+T)

  • Heat 42CrMo4 steel slowly to 880°C;
  • Soak at this temperature then quench in oil;
  • Temper as soon as 42CrMo4 steel reach room temperature (20°C);
  • Heat uniformly to the suitable temperature of 560°C;
  • Withdraw the 42CrMo4 material from the furnace and cool in the air.

6. Forging of 42CrMo4 Alloy Steel

  • Preheat 42CrMo4 engineering steel uniformly and slowly;
  • Increase the forging temperature up to 1150-1200°C.
  • Always keep the forging temperature above at least 850°C

7. Weldability


Engineering steel 42CrMo4 has only limited weldability. Preheating to 200-300°C is strongly recommended; the upper limit should not be exceeded because of risk for deterioration of the chrome layer.

Alloy steel 42CrMo4 can be friction welded. However, precautions are necessary so as to limit the formation of undesirable microstructures in the welded zone.


8. Application of 42CrMo4 Alloy Steels


EN 42CrMo4 alloy steel is widely used for engineering steel purpose, such as: making various kinds of machinery, automobile, mining spare part, the gearwheel of the engine, the driving gear of supercharger, the connecting rob, the pinchock under the high pressure, parts for power train applications, cold formed fastener components, shafts, gears, drill collars for the oil exploration, etc.


42CRMO4 Stainless Pipes Shows  


BS EN 42CrMo4 Black Surface Alloy Steel Seamless Pipes With High Strength And Hardenability 2