All CNC machining knowledge articles, material guides, process notes, and sourcing resources.
40CrNiMoA 是一种高强度合金结构钢，执行标准 GB/T 3077-1999。对应德国 34CRNIMO6、美国 4340、英国 817M40。调质后具有高强度、高韧性，广泛用于航空零件、汽轮机轴、齿轮等。
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20CrNiMoA 是一种低碳合金渗碳钢，执行国家标准 GB/T 3077-1999。对应 ISO 标准的 20NiCrMo2，美国 ASTM 标准的 8620，日本 JIS 标准的 SNCM220。渗碳后表面硬度高（HRC 58-62），心部韧性好，广泛用于制造汽车齿轮、石油钻探设备等。
Comprehensive guide to Carbon Steel 73: properties, machining, applications.
Comprehensive guide to Aluminum Alloy 71: properties, machining, applications.
Comprehensive guide to Alloy Steel 69: properties, machining, applications.
Comprehensive guide to Alloy Steel 68: properties, machining, applications.
Comprehensive guide to Titanium Alloy 67: properties, machining, applications.
Comprehensive guide to Tool Steel 66: properties, machining, applications.
Comprehensive guide to Tool Steel 62: properties, machining, applications.
Comprehensive guide to Stainless Steel 60: properties, machining, applications.
Comprehensive guide to Aluminum Alloy 59: properties, machining, applications.
Comprehensive guide to Tool Steel 58: properties, machining, applications.
Comprehensive guide to Alloy Steel 56: properties, machining, applications.
Comprehensive guide to Stainless Steel 50: properties, machining, applications.
Comprehensive guide to Tool Steel 49: properties, machining, applications.
Comprehensive guide to Titanium Alloy 47: properties, machining, applications.
Comprehensive guide to Copper Alloy 46: properties, machining, applications.
Comprehensive guide to Stainless Steel 45: properties, machining, applications.
Technical guide to Stainless Steel 74: properties and machining.
Comprehensive guide to Aluminum Alloy 43: properties, machining, applications.
