Alloy Structural Steel

Features of Alloy Structural Steel

• 1 Alloy steels are simply steels that have been alloyed with other elements such as manganese, molybdenum, vanadium, silicon, boron, nickel and chromium.
   
  Technically speaking, all steels are alloys, as steel is a combination of Iron (FE) and Carbon. ‘Alloy steels’, however, are those that have additional elements alloyed with them, in addition to the Carbon.
   
  The alloying is done to achieve certain properties within the steel, such as increased hardness, hot hardness, strength, toughness, wear resistance, corrosion resistance and hardenability.
   
  Quenching and tempering is a two-step process in which the metal is first heated to extreme temperatures and quickly cooled in water to harden the steel (known as quenching). The metal is clamped securely to avoid warping. The steel is then tempered, in order to achieve the desired properties.
   
  Quenched and tempered steel is characterized by good ductility and strength, and an extremely fine-grained microstructure.
  ALLOY STRUCTURE STEEL合金结构钢
  

  编号 NO:	近似钢号					用途	Application
  	中国GB	美国AISI	德国DIN	日本JIS	外企 Foreign Enterprise
  1	40Cr	5140	1.7035 41Cr4	SCR440		广泛使用的轴、螺栓、连杆等	For shaft,screw bolt, joint shaft in widely use
  2	30CrNi3	3435	1.5755 31NiCr14	SNC631		承受大冲击、扭力载的轴、螺栓、连杆等	For shaft,bolt, join td-olt endureing sudden impacting
  3	40CrNiMo	4340	1.6582 36CrNiMo4	SNCM439		大直径汽轮机叶片、轴和螺栓等	For vane,shaft bolt of large dia steamer
  4	35CrMo	4135	1.7220 34CrMo4	SCM435		汽轮机主轴400°C使用螺栓、轧机人字齿、锤杆等	For main shaft of steamer,bolt for 400°C,Hummar shank
  5	42CrMo	4140	1.7225 42CrMo4	SCM440		同35CrMo,便截面可更大，强度也高	Same as 35CrMo with big section supper force
  6	*35CrMoV	4135		SCM435		使用温度≤500°C汽轮机叶轮，压缩机转子等	For steamer vane againest 500°C rotor of compresser
  7	50CrV	6150	1.8159 51CrV4	SUP10		在200°C使用弹簧钢供内燃机，轿车等用	Spring steel for gas engine,car within 200°C
  8	60Si2MnA	9260	55Si7	SUP7		主要用于汽车、机车、拖拉机等专用弹簧	Spring steels for car, engine and tractor etc.
  9	60Si2CrA	9254	1.0961 60SiCr7	SUP12		在250°C内用作高载荷的大型弹簧	Spring steel for big gas engine, pump,crusher etc,with in 250°C
  10	55CrMnA	5155	1.7176 55Cr3	SUP9		用作重载荷，高应力条件下的大型弹簧，如汽车、机车等	Spring steel for car,engine,tractor etc.

   

  编号 NO:	合金结构钢化学成份(% ) Chemical composition										退火状态 硬度≤ Annealed Hardness	力学性能（≤）					热处理温度(℃) Heal Treatment Temp
  	C	Si	Mn	P≤	S≤	Cr	W	Mo	V			RM (MPa)	RM (MPa)	Ae %	Z %	A(S)	淬火  Quench	回火 Tempering
  1	0.40	0.30	0.70	0.025	0.025	1.00	≤0.25	—	—		207	980	785	9	45	47	850°C 油Oil	520°C 水/油
  2	0.30	0.30	0.50	0.025	0.025	0.80	3.00	—	—		241	980	785	9	45	63	850°C 油Oil	500°C 水/油
  3	0.40	0.30	0.55	0.025	0.025	0.80	1.35	0.20	—		269	980	835	12	55	78	850°C 油Oil	600°C 水/油
  4	0.33	0.30	0.60	0.025	0.025	1.00	≤0.25	0.20	—		229	980	835	12	45	63	850°C 油Oil	550°C 水/油
  5	0.42	0.30	0.60	0.025	0.025	1.00	≤0.25	0.20	—		229	1080	930	12	45	63	850°C 油Oil	560°C 水/油
  6	0.35	0.30	0.60	0.025	0.025	1.20	≤0.25	0.20	0.15		241	980	835	12	45	63	850°C 油Oil	550°C 水/油
  7	0.50	0.30	0.70	0.025	0.025	1.00	≤0.25	—	0.15		255	1280	1130	10	40		850°C 油Oil	500°C 水/油
  8	0.60	1.80	0.85	0.020	0.020	0.18	—	—	—		321	1570	1375	5	20		870°C 油Oil	440°C 水/油
  9	0.60	0.60	0.60	0.030	0.030	0.80	—	—	—		321	1765	1570	6	20		870°C 油Oil	420°C 水/油
  10	0.55	0.36	0.70	0.025	0.025	0.80	—	—	—		321	1225	1080	9	20		860°C 油Oil	510°C 水/油