30Cr
2024-04-20 13:50:50 Origin： Remark：0 Click：
GJB 1220A Material Specification for Alloy Structure Steel Bar for Artillery Parts 30Cr Stock Available Round bar, Flat bar 30Cr Tube and Forgings.
MATERIAL DATASHEET - GB 30Cr
MATERIAL CATEGORY - Specification for Alloy Structure Steel Bar for Artillery Parts,
PRODUCT DESCRIPTION
The alloy is usually produced by EAF + VD + LF / VIM 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.
Bars are usually supplied bright in the annealed condition, or bright annealing specially.
Final heat treatment - Quenched and tempered.
Stock Available: Round bar diam. 15 ~ 320mm
MATERIAL CATEGORY - Specification for Alloy Structure Steel Bar for Artillery Parts,
PRODUCT DESCRIPTION
The alloy is usually produced by EAF + VD + LF / VIM 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.
Bars are usually supplied bright in the annealed condition, or bright annealing specially.
Final heat treatment - Quenched and tempered.
Stock Available: Round bar diam. 15 ~ 320mm
MATERIAL SPECIFICATIONS - GJB 1220A - 2008
CHEMICAL COMPOSITION (mass weight - %)
Carbon, C (％): 0.27 ~ 0.34
Silicon, Si (％): 0.17 ~ 0.37
Manganese, Mn (％): 0.50 ~ 0.80
Phosphorus, P (％) ≤: 0.025
Sulfur, S (％) ≤: 0.020
Chromium, Cr (％): 0.80 ~ 1.10
Nickel, Ni (%): ≤ 0.30
Molybdenum, Mo (％): -
Vanadium, V (％): -
Tungsten, W (%): -
Aluminum, Al (%): -
Titanium, Ti (%): -
Ferrum, Fe (%): balance
Molybdenum, Mo (％): -
Vanadium, V (％): -
Tungsten, W (%): -
Aluminum, Al (%): -
Titanium, Ti (%): -
Ferrum, Fe (%): balance
MECHANICAL PROPERTIES - HOT WORKING, HEAT TREATMENT AND HARDNESS
Heat treatment temperature /℃| annealing: 690 ~ 710 air cooling.
Heat treatment temperature /℃| Normalizing: -
Heat treatment temperature /℃| Quenching: 860 oil
Heat treatment temperature /℃| Tempering : 500 water
Hardness after annealing ≤HBW: 187 Max.
Tensile strength, Rm ≥ MPa: 885
Yield strength, Rp0.2 ≥ MPa: 685
Elongation, A ≥ (%): 11.0
Reduction of area, Z ≥ (%): 40.0
Impact strength, AKu ≥ J: 45
PRODUCT PROFILE & DIMENSIONS
Round bar & Disc (diameter): 5.5mm to 1000mm
Square bar / Flat bar: 8mm to 610mm
Length: Fixed length or random length or based on the customer's special requirement.
Sheet / Plate steel T0.5 - 6mm X W60 - 1500mm X L1000 - 12000mm
TECHNICAL SALES ASSISTANCE
20+ years Focus On Special Steel Manufacturing and processing.
Stock over 60 grades with a competitive price, along with cutting service for specific requirement.
Customizing special material is welcome.
We closely cooperate with the professional inspection partners to strictly control the quality and improve the quality manage system, and guarantee the goods delivery each time. It is proved that we are worth of trusting and will be the strategic partner of the supplying chains in the special steels field.
If you meet further on any technical enquiry, pleased to email or call our resident team of qualified production engineers,
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