080M40 BLACK AXLE STEEL (En 8)

BS 970	SAE (A1S1)	WERKSTOFF No
080M40	1043	1.0503

CHEMICAL COMPOSITION

Carbon	Silicon	Manganese	Sulphur	Phosphorus
0.36 - 0.44	0.05 - 0.35.	0.060 - 1.00	0.06 Max	0.06 Max.

MECHANICAL PROPERTIES

PROPERTY

CONDITION

	Normalized	Hardened & Tempered Q	Hardened & Tempered R
Limited Ruling Section Min.	254	65	22
Tensile Strength, MPa. Min.	510 / 540	620 / 770	690 / 850
Yield Stress, MPa, Min.	245	385	465
Elongation percent, Min.	17	22	20
Izod Impact Value, Joule, Min.	20	33.4	33.4
Brinell Hardness Number	152 / 207	179 / 229	210 / 255

STANDARD STOCK SIZES IN THE "AS ROLLED" or NORMALIZED CONDITION

SIZE	Kg/m		SIZE	Kg/m		SIZE	Kg/m		SIZE	Kg/m		SIZE	Kg/m		SIZE	Kg/m
20mm	2.466		65mm	26.049		108mm	71.846		180mm	199.757		250mm	385.336		320mm	630.784
25mm	3.853		70mm	30.210		110mm	74.563		190mm	222.570		260mm	416.416		330mm	670.824
30mm	5.549		75mm	34.680		115mm	81.537		200mm	246.614		270mm	449.064		340mm	712.096
35mm	7.553		80mm	39.458		120mm	88.781		203mm	253.847		275mm	465.850		350mm	754.600
40mm	9.865		85mm	44.545		130mm	104.195		210mm	271.893		280mm	482.994		380mm	889.504
45mm	12.485		90mm	49.939		140mm	120.841		215mm	284.746		290mm	518.056		400mm	985.600
50mm	15.413		95mm	55.642		150mm	138.721		220mm	298.403		300mm	554.400		410mm	1035.496
55mm	18.650		100mm	61.654		160mm	157.833		230mm	326.148		305mm	573.034
60mm	22.195		103mm	63.386		170mm	178.179		240mm	355.125		310mm	591.976

TYPICAL USES

Dynamo and motor shafts, heat-treated bolts, crankshafts, connecting rods, driving rings and flanges, railway couplings, axles, brackets, housings, miscellaneous gun carriage and small arms parts not subjected to high stresses or severe wear.