300M / K44220
2025-08-07 15:05:00 Origin： Remark：0 Click：
A high tensile strength steel 300M, K44220 round bar, flat bar, AMS 6417 Vaccum induction melting properties, ESR melted, hot forging / rolling, heat treatment,
TECHNICAL DATA SHEET - 300M & K44220
MATERIAL FORM: Bar, Forge piece, Tube
MATERIAL TYPE: Aerospace Material Specification - Structural steel
Official Test Certificate Report: issued by TUV - SGS - BV
TYPICAL CHEMICAL COMPOSITIONS (mass fraction %)
Carbon, C (％): 0.38 ~ 0.43
TYPICAL CHEMICAL COMPOSITIONS (mass fraction %)
Carbon, C (％): 0.38 ~ 0.43
Silicon, Si: (%): 1.50 ~ 1.80
Manganese, Mn (%): 0.70 ~ 1.00
Chromium, Cr (％): 0.65 ~ 1.00
Nickel, Ni (％): 1.65 ~ 2.00
Chromium, Cr (％): 0.65 ~ 1.00
Nickel, Ni (％): 1.65 ~ 2.00
Molybdenum, Mo (％): 0.30 ~ 0.50
Vanadium, V (%): 0.05 ~ 0.15
MECHANICAL PROPERTY UNDER ROOM TEMP.
Tensile strength, σb ≥ MPa: 1860
Yield strength, σs ≥ MPa: 1515
Elongation, δ5 ≥ (%): 8.0
Yield strength, σs ≥ MPa: 1515
Elongation, δ5 ≥ (%): 8.0
Impact strength, AKv ≥ J: 35
Annealed hardness HB: 277
Annealed hardness HB: 277
PRODUCT DESCRIPTION
The alloy is usually produced by VM / CVM followed by electroslag refining (ESR), Vacuum Arc Melting (VAR) if necessary for special purpose. Bars and, where applicable, forgings are subjected to ultrasonic examination based on the different levels according to the buyers' specific requirements.
Round bar / rod (diameter): 5.5 to 300mm
Square bar / flat bar: 8 to 600mm
Length: random length or based on the customer's special requirement.
Heavy/middle plate via hot rolled: T6 - 200 X W20 - 1000 X L1000-2000mm
Forging piece: stepped shafts, and other different shapes based on OEM.
The alloy is usually produced by VM / CVM followed by electroslag refining (ESR), Vacuum Arc Melting (VAR) if necessary for special purpose. Bars and, where applicable, forgings are subjected to ultrasonic examination based on the different levels according to the buyers' specific requirements.
Round bar / rod (diameter): 5.5 to 300mm
Square bar / flat bar: 8 to 600mm
Length: random length or based on the customer's special requirement.
Heavy/middle plate via hot rolled: T6 - 200 X W20 - 1000 X L1000-2000mm
Forging piece: stepped shafts, and other different shapes based on OEM.
MAIN STEEL GRADE FOR EXPORT MARKET
ASTM A565 Grade 616/422/S42200, Grade 615/S41800, XM-32/S64152, PH13-8/XM-13/s13800
17-4PH/630/1.4542, 631, 851, 961, WB36, D6-AC, D6A. A-286/660
1.4980, 1.4922, 1.4923, 1.4935, 1.4938, 1.4913, 1.4122
Forms: Bars, Forge piece, Ring, Strip
TECHNICAL SALES ASSISTANCE & SERVICE
If you meet further on any technical enquiry, pleased to EMAIL our resident team of qualified production engineer. E-mail: sales@ccsteels.com
If you meet further on any technical enquiry, pleased to EMAIL our resident team of qualified production engineer. E-mail: sales@ccsteels.com
