〔26〕特殊用途合金钢螺栓钢棒
（Alloy Steel Bars for Special Application Bolting Materials )
标准代号	规格号码	记号	化学成分（%)Chemical composition									拉伸试验 Tensile requirements				硬度（HB)
			C	Si	Mn	P	S	Ni	Cr	Mo	V	直径（mm)	降伏强度(Mpa)	抗拉强度(Mpa)	伸长度(%)
JIS	G4108	SNB21-1	0.36-0.44	0.20-0.35	0.45-0.70	≦0.025	≦0.025	-	0.80-1.15	0.50-0.65	0.25-0.35	≦100	≧1030	≧1140	≧10	311-429
ASTM	A540	Gr.B21-1	0.36-0.44	0.15-0.35	0.45-0.70	≦0.025	≦0.025	-	0.80-1.15	0.50-0.65	0.25-0.35	≦100	≧1030	≧1140	≧10	311-429
DIN	17240	40CrMoV4-7	0.35-0.45	0.2-0.3	0.4-0.7	≦0.04	≦0.04	-	0.8-1.2	0.5-0.7	0.25-0.35	-	-	-	-	-
JIS	G4108	SNB21-2	0.36-0.44	0.20-0.35	0.45-0.70	≦0.025	≦0.025	-	0.80-1.15	0.50-0.65	0.25-0.35	≦100	≧960	≧1070	≧11	311-401
ASTM	A540	Gr.B21-2	0.36-0.44	0.15-0.35	0.45-0.70	≦0.025	≦0.025	-	0.80-1.15	0.50-0.65	0.25-0.35	≦100	≧965	≧1070	≧11	311-401
DIN	17240	40CrMoV4-7	0.35-0.45	0.2-0.3	0.4-0.7	≦0.04	≦0.04	-	0.8-1.2	0.5-0.7	0.25-0.35	-	-	-	-	-
JIS	G4108	SNB21-3	0.36-0.44	0.20-0.35	0.45-0.70	≦0.025	≦0.025	-	0.80-1.15	0.50-0.65	0.25-0.35	≦75	≧890	≧1000	≧12	293-352
ASTM	A540	Gr.B21-3	0.36-0.44	0.15-0.35	0.45-0.70	≦0.025	≦0.025	-	0.80-1.15	0.50-0.65	-	≦75	≧896	≧1000	≧12	293-352
DIN	17240	40CrMoV4-7	0.35-0.45	0.2-0.3	0.4-0.7	≦0.04	≦0.04	-	0.8-1.2	0.5-0.7	0.25-0.35	-	-	-	-	-
JIS	G4108	SNB21-4	0.36-0.44	0.20-0.35	0.45-0.70	≦0.025	≦0.025	-	0.80-1.15	0.50-0.65	0.25-0.35	≦75	≧825	≧930	≧13	269-331
ASTM	A540	Gr.B21-4	0.36-0.44	0.15-0.35	0.45-0.70	≦0.025	≦0.025	-	0.80-1.15	0.50-0.65	0.25-0.35	≦150	≧327	≧931	≧13	277-352
DIN	17240	40CrMoV4-7	0.35-0.45	0.20-0.35	0.45-0.70	≦0.04	≦0.04	-	0.8-1.2	0.5-0.7	0.25-0.35	-	-	-	-	-
JIS	G4108	SNB21-5	0.34-0.46	0.20-0.35	0.45-0.70	≦0.025	≦0.025	-	0.80-1.15	0.50-0.65	0.25-0.35	≦50	≧715	≧820	≧15	241-285
ASTM	A540	Gr.B21-5	0.36-0.44	0.20-0.35	0.45-0.70	≦0.025	≦0.025	-	0.80-1.15	0.50-0.65	0.25-0.35	≦50	≧724	≧827	≧15	241-285
DIN	17240	40CrMoV4-7	0.35-0.45	0.20-0.35	0.45-0.70	≦0.04	≦0.04	-	0.8-1.2	0.5-0.7	0.25-0.35	-	-	-	-	-
JIS	G4108	SNB22-1	0.39-0.46	0.20-0.35	0.65-1.10	≦0.025	≦0.025	-	0.75-1.20	0.15-0.25	-	≦38	≧1030	≧1140	≧10	321-401
ASTM	A540	Gr.B22-1	0.39-0.46	0.15-0.35	0.65-1.10	≦0.025	≦0.025	-	0.75-1.20	0.15-0.25	-	≦38	≧1034	≧1138	≧10	321-401
DIN	17240	42CrMoV4	0.30-0.45	0.15-0.40	0.5-0.8	≦0.035	≦0.035	-	0.9-1.2	0.15-0.30	-	16≦t≦40	≧765	980-1180	≧11	540-680
JIS	G4108	SNB22-2	0.39-0.46	0.20-0.35	0.65-1.10	≦0.025	≦0.025	-	0.75-1.20	0.15-0.25	-	≦75	≧960	≧1070	≧11	311-401
ASTM	A540	Gr.B22-2	0.39-0.46	0.15-0.35	0.65-1.10	≦0.025	≦0.025	-	0.75-1.20	0.15-0.25	-	≦75	≧965	≧1069	≧11	311-401
DIN	17240	42CrMoV4	0.30-0.45	0.15-0.40	0.5-0.8	≦0.035	≦0.035	-	0.9-1.2	0.15-0.30	-	16≦t≦40	≧765	980-1180	≧11	540-680
JIS	G4108	SNB22-3	0.39-0.46	0.20-0.35	0.65-1.10	≦0.025	≦0.025	-	0.75-1.20	0.15-0.25	-	50≦t≦100	≧890	≧1000	≧12	302-375
ASTM	A540	Gr.B22-3	0.39-0.46	0.15-0.35	0.65-1.10	≦0.025	≦0.025	-	0.75-1.20	0.15-0.25	-	50≦t≦100	≧896	≧1000	≧12	302-375
DIN	17240	42CrMoV4	0.30-0.45	0.15-0.40	0.5-0.8	≦0.035	≦0.035	-	0.9-1.2	0.15-0.30	-	16≦t≦40	≧765	980-1180	≧11	540-680
JIS	G4108	SNB22-4	0.39-0.45	0.20-0.35	0.65-1.10	≦0.025	≦0.025	-	0.75-1.20	0.15-0.25	-	25-100	≧825	≧930	≧13	269-341
ASTM	A540	Gr.B22-4	0.39-0.45	0.15-0.35	0.65-1.10	≦0.025	≦0.025	-	0.75-1.20	0.15-0.25	-	25-100	≧827	≧930	≧13	269-341
DIN	17240	42CrMoV4	0.30-0.45	0.15-0.40	0.5-0.8	≦0.035	≦0.035	-	0.9-1.2	0.15-0.25	-	16≦t≦40	≧765	980-1180	≧11	540-680
JIS	G4108	SNB22-5	0.39-0.46	0.20-0.35	0.65-1.10	≦0.025	≦0.025	-	0.75-1.20	0.15-0.25	-	≦50	≧715	≧820	≧15	248-293
ASTM	A540	Gr.B22-5	0.39-0.46	0.15-0.35	0.65-1.10	≦0.025	≦0.025	-	0.75-1.20	0.15-0.25	-	≦50	≧716	≧827	≧15	248-293
DIN	17240	42CrMoV4	0.30-0.45	0.15-0.40	0.5-0.8	≦0.025	≦0.025	-	0.9-1.2	0.15-0.30	-	16≦t≦40	≧765	980-1180	≧11	540-680
JIS	G4108	SNB23-1	0.37-0.44	0.20-0.35	0.60-0.95	≦0.025	≦0.025	1.55-2.00	0.65-0.95	0.2-0.3	-	≦75	≧1030	≧1140	≧10	321-415
ASTM	A540	Gr.B23-1	0.37-0.44	0.15-0.35	0.60-0.95	≦0.025	≦0.025	1.55-2.00	0.65-0.95	0.2-0.3	-	≦75	≧1030	≧1138	≧10	321-415
JIS	G4108	SNB23-2	0.37-0.44	0.20-0.35	0.60-0.95	≦0.025	≦0.025	1.55-2.00	0.65-0.95	0.2-0.3	-	≦75	≧960	≧1070	≧11	311-388
ASTM	A540M	Gr.B23-2	0.37-0.44	0.15-0.35	0.60-0.95	≦0.025	≦0.025	1.55-2.00	0.65-0.95	0.2-0.3	-	≦75	≧965	≧1069	≧11	311-388
JIS	G4108	SNB23-3	0.37-0.44	0.20-0.35	0.60-0.95	≦0.025	≦0.025	1.55-2.00	0.65-0.95	0.2-0.3	-	≦75	≧890	≧1000	≧12	293-363
ASTM	A540	Gr.B23-3	0.37-0.44	0.15-0.35	0.60-0.95	≦0.025	≦0.025	1.55-2.00	0.65-0.95	0.2-0.3	-	≦75	≧896	≧1000	≧12	293-363
JIS	G4108	SNB23-4	0.37-0.44	0.20-0.35	0.60-0.95	≦0.025	≦0.025	1.55-2.00	0.65-0.95	0.2-0.3	-	≦75	≧825	≧930	≧13	269-341
ASTM	A540	Gr.B23-4	0.37-0.44	0.15-0.35	0.60-0.95	≦0.025	≦0.025	1.55-2.00	0.65-0.95	0.2-0.3	-	≦75	≧827	≧931	≧13	269-341
JIS	G4108	SNB23-5	0.37-0.44	0.20-0.35	0.60-0.95	≦0.025	≦0.025	1.55-2.00	0.65-0.95	0.2-0.3	-	≦150	≧715	≧820	≧15	-
ASTM	A540	Gr.B23-5	0.37-0.44	0.15-0.35	0.55-0.90	≦0.035	≦0.04	1.55-2.00	0.65-0.95	0.2-0.3	-	≦150	≧724	≧827	≧15	-
JIS	G4108	SNB24-1	0.37-0.44	0.20-0.35	0.7-0.9	≦0.025	≦0.025	1.65-2.00	0.70-0.95	0.3-0.4	-	≦150	≧1030	≧1140	≧10	-
ASTM	A540	Gr.B24-1	0.37-0.44	0.15-0.35	0.7-0.9	≦0.025	≦0.025	1.65-2.00	0.7-0.9	0.3-0.4	-	≦150	≧1034	≧1138	≧10	-
DIN	17242	40NiCrMo-7-3	0.37-0.44	≦0.4	0.7-0.9	≦0.02	≦0.015	1.65-2.00	0.7-0.9	0.3-0.4	-	-	-	-	-	-
JIS	G4108	SNB24-2	0.37-0.44	0.20-0.35	0.7-0.9	≦0.025	≦0.025	1.65-2.00	0.70-0.95	0.3-0.4	-	≦240	≧960	≧1070	≧11	-
ASTM	A540	Gr.B24-2	0.37-0.44	0.7-0.9	0.7-0.9	≦0.025	≦0.025	1.65-2.00	0.7-0.9	0.3-0.4	-	≦240	≧965	≧1069	≧11	-
DIN	17242	40NiCrMo-7-3	0.37-0.44	≦0.4	0.7-0.9	≦0.02	≦0.015	1.65-2.00	0.7-0.9	0.3-0.4	-	-	-	-	-	-
JIS	G4108	SNB24-3	0.37-0.44	0.20-0.35	0.7-0.9	≦0.025	≦0.025	1.65-2.00	0.70-0.95	0.3-0.4	-	≦75	≧890	≧1000	≧12	-
ASTM	A540	Gr.B24-3	0.37-0.44	0.15-0.35	0.7-0.9	≦0.025	≦0.025	1.65-2.00	0.70-0.95	0.3-0.4	-	≦240	≧896	≧1000	≧12	-
DIN	17242	40NiCrMo-7-3	0.37-0.44	≦0.4	0.7-0.9	≦0.02	≦0.015	1.65-2.00	0.7-0.9	0.3-0.4	-	-	-	-	-	-
JIS	G4108	SNB24-4	0.37-0.44	0.20-0.35	0.7-0.9	≦0.025	≦0.025	1.65-2.00	0.70-0.95	0.3-0.4	-	≦75	≧825	≧930	≧13	269-341
ASTM	A540	Gr.B24-4	0.37-0.44	0.15-0.35	0.7-0.9	≦0.025	≦0.025	1.6-2.0	0.7-0.9	0.3-0.4	-	≦240	≧827	≧931	≧13	293-363
DIN	17242	40NiCrMo-7-3	0.37-0.44	≦0.4	0.7-0.9	≦0.02	≦0.015	1.65-2.00	0.7-0.9	0.3-0.4	-	-	-	-	-	-
JIS	G4108	SNB24-5	0.37-0.44	0.20-0.35	0.7-0.9	≦0.025	≦0.025	1.65-2.00	0.70-0.95	0.3-0.4	-	≦150	≧715	≧820	≧15	248-311
ASTM	A540	Gr.B24-5	0.33-0.44	0.15-0.35	0.7-0.9	≦0.025	≦0.025	1.6-2.0	0.7-0.9	0.3-0.4	-	≦150	≧724	≧828	≧15	248-311
DIN	17242	40NiCrMo-7-3	0.37-0.44	0.20-0.35	0.7-0.9	≦0.025	≦0.025	1.65-2.00	0.70-0.95	0.3-0.4	-	-	-	-	-	-