EN 27
2025-06-24 15:21:00   Origin：   Remark：0 Click：

TECHNICAL DATA SHEET - EN27

MATERIAL CATEGORY: High tensile steel
TECHNICAL SPECIFICATION - BS970
OFFICIAL TEST REPORT: issued by TUV - SGS -  BV
CHEMICAL COMPOSITIONS (mass fraction %)
Carbon, C (％): 0.25 ~ 0.35
Manganese, Mn (％): ≤ 0.70
Silicon, Si (％): 0.10 ~ 0.40
Phosphorus, P (％) ≤: 0.040
Sulfur, S (％) ≤: 0.040
Chromium, Cr (%): 0.50 ~ 1.30
Nickel, Ni (%): 3.00 ~ 3.75
Molybdenum, Mo (%): 0.20 ~ 0.65
MECHANICAL PROPERTY AND HARDNESS
Annealed hardness, ≤ HB: -
Quenching temperature /℃: 820 ~ 850, oil or water
Tempering temperature /℃: 450 ~ 650, air
Hardness in quenched condition: HB 278 ~ 385
Tensile strength, Rm ≥ MPa: 970 ~ 1180
Yield strength, Rp0.2 ≥ MPa: 810
Elongation, A5 ≥ (％): 10.0
MELTING PROCESS & APPLICATION
This alloy is generally smelt in Electric Arc Furnace  (EAF), EAF+LF+VD, LF + Electroslag remelting (ESR).
For a purpose of superior quality, it should be smelt via technology of vacuum refining or by agreement.
It is suitable for applications such as high tensile shafts, bolts and nuts, gears, pinions spindles.
PRODUCT PROFILE AND DIMENSIONS
Rod / round bar / disc (diameter): 5.5 to 550mm
Square bar / flat bar: 8mm to 600mm
Length: random length or based on the customer's special requirement.
Other different shapes based on OEM. 
TECHNICAL SALES ASSISTANCE & SERVICE
If you meet further on any technical enquiry, pleased to EMAIL (sales@ccsteels.com) our resident team of qualified production engineers.