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Alloy structural steel
Name Brand Specifications Executive standard Chemical composition analysis (melting composition)% Performance characteristics Purpose
C Si Mn P  ≤ S  ≤ Other
Alloy structural steel 20CrMnTi Φ18~65 GB/T 3077 0.17-0.23 0.17-0.37 0.80-1.10 0.03 0.03 Cr1.00-1.30
 Ti 0.04-0.10		 Good mechanical properties and processing properties, and the structure and performance are higher than the relevant requirements of national standards Gear, shaft, connecting rod and other mechanical parts
20Cr Φ18~65 0.18-0.24 0.17-0.37 0.50-0.80 0.03 0.03 Cr 0.70-1.00
40Cr Φ18~65 0.37-0.44 0.17-0.37 0.50-0.80 0.03 0.03 Cr 0.80-1.10
20MnTiB Φ18~65 0.17-0.24 0.17-0.37 1.30-1.60 0.03 0.03 B  0.0008-0.0035
Ti  0.04-0.10
20CrMo Φ18~65 0.17-0.24 0.17-0.37 0.40-0.70     Cr  0.80-1.10
Mo  0.15-0.25
25CrMo Φ18~65 0.22-0.29 0.17-0.37 0.60-0.90     Cr  0.90-1.20
Mo  0.15-0.30

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High carbon chromium bearing steel
Name Brand Specifications Executive standard Chemical composition analysis (melting composition)% Performance characteristics Purpose
C Si Mn P  ≤ S  ≤ Cr
High carbon chromium bearing steel GCr15 Φ18~65 GB/T 18254 0.95-1.05 0.15-0.35 0.25-0.45 0.025 0.020 1.40-1.65 It has high and uniform hardness, good wear resistance and high contact fatigue life, and good cold and hot processing performance It can be used to make bearing rings, rolling elements with a wide range of dimensions, as well as molds, measuring tools and other parts requiring high wear resistance and contact fatigue strength

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Round steel for tooling
Name Brand Specifications Executive standard Chemical composition analysis (melting composition)% Performance characteristics Purpose
C Si Mn P  ≤ S  ≤ Cr
Round steel for tooling T7 Φ18~65 GB/T1299 0.65-0.74 ≤0.35 ≤0.40 0.030 0.030   Meet the requirements of relevant organizations and performance of national standards Cutting, cutting tools, such as file, turning tool, tap, etc
T8 Φ18~65 0.75-0.84 ≤0.35 ≤0.40 0.030 0.030  
T9 Φ18~65 0.85-0.94 ≤0.35 ≤0.40 0.030 0.030  
T10 Φ18~65 0.95-1.04 ≤0.35 ≤0.40 0.030 0.030  
T11 Φ18~65 1.05-1.14 ≤0.35 ≤0.40 0.030 0.030  
T12 Φ18~65 1.15-1.24 ≤0.35 ≤0.40 0.030 0.030  
T13 Φ18~65 1.25-1.35 ≤0.35 ≤0.40 0.030 0.030  
9SiCr Φ18~65 0.85-0.95 1.20-1.60 0.30-0.60 0.030 0.030 0.95-1.25 The hardness, wear resistance and hardenability are good, and the structure and properties meet the standard requirements. Cutting tools, drawing dies, cold forging tools, measuring tools, etc
Cr2 Φ18~65 0.95-1.10 ≤0.40 ≤0.40 0.030 0.030 0.10-0.30

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Continuous cast round billets for structural and delivery pipes
Name Brand Specifications Executive standard Chemical composition analysis (melting composition)% Purpose
C Si Mn P  ≤ S  ≤ Other
连铸圆管坯 20 Φ160~230 YB/T 4149 Supply technical agreement 0.17-0.23 0.17-0.37 0.35-0.65 0.035 0.035   For structural pipe, transmission pipe, etc
45 Φ160~230 0.42-0.50 0.17-0.37 0.50-0.80 0.035 0.035  
L245N Φ160~230 0.13-0.16 0.20-0.35 0.90-1.10 0.02 0.02 Ti≤0.030
Q335B Φ160~230 ≤0.24 ≤0.55 ≤1.60 0.035 0.035 Cr≤0.30
37Mn5 Φ160~230 0.34-0.39 0.20-0.35 1.25-1.50 0.025 0.015 Cr≤0.150

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