42CrMoA
2024-03-23 16:11:24   Origin：   Remark：0 Click：

TECHNICAL DATASHEET - GB 42CrMoA
MATERIAL CATEGORY - Steels for Turbine bolts and nuts at high tmperature
PRODUCT DESCRIPTION
The alloy is usually produced by EAF + VD + LF followed by electroslag refining (ESR) if necessary for special purpose. Bars and, where applicable, forgings are subjected to ultrasonic examination based on the different level according to the buyers' requirements.
Bars are usually supplied bright in the annealed condition, or bright annealing specially.
Final heat treatment - Quenched and tempered. 
Stock Available: Round bar diam. 20 ~ 350mm
MATERIAL SPECIFICATIONS - GB/T 20410 - 2006
CHEMICAL COMPOSITIONS (mass weight - %)      
Carbon, C (％): 0.38 ~ 0.45
Silicon, Si (％): 0.17 ~ 0.37
Manganese, Mn (％): 0.50 ~ 0.80
Phosphorus, P (％) ≤: 0.025
Sulfur, S (％) ≤: 0.020
Chromium, Cr (％): 0.90 ~ 1.20
Molybdenum, Mo (％): 0.15 ~ 0.25
Nickel, Ni (%): ≤ 0.30
Copper, Cu (％): ≤ 0.25
Vanadium, V (%): -
Titanium, Ti (%): -
Boron, B (%): -
Nitrogen, N (%): -
MECHANICAL PROPERTIES - HOT WORKING, HEAT TREATMENT AND HARDNESS
Heat treatment temperature /℃ | annealing: 690 ~ 710 air cooling.
Heat treatment temperature /℃ | Normalizing:  -
Heat treatment temperature /℃ | Quenching:  850 Oil
Heat treatment temperature /℃ | Tempering : 580
Hardness after annealing ≤ HBS:  220 Max.
Tensile strength, Rm ≥ MPa:  795
Yield strength, Rp0.2 ≥ MPa:  655
Elongation, A5 ≥ (%): 15.0
Reduction of area, Z ≥ (%): 50.0
Impact strength, AKv ≥ J:  50
PRODUCT PROFILE & DIMENSIONS
Round bar & Disc (diameter): 5.5mm to 1100mm
Square bar / Flat bar: 8mm to 800mm
Length: Fixed length or random length or based on the customer's special requirement.
Sheet steel via cold rolled: T0.5 - 6mm X W600- 1000mm X L1000 - 2000mm
TECHNICAL SALES ASSISTANCE
If you meet further on any technical enquiry, pleased to email or call our resident team of qualified production engineers, Email: sales@ccsteels.com.