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Alaşımsız yapı çelikleri

Alaşımsız yapı çelikleri, demire eşlik eden elementlerin belirtilen minimum değerleri aşmadığı tüm düşük karbonlu çelikleri kapsar. Kullanımlarında belirleyici faktörler akma mukavemeti, şekillendirilebilirlik ve kaynaklanabilirliktir. Yumuşak, kolay şekillenen, tok ve sünek olmalarına karşın ısıl işlemle sertleştirilemezler.

Kalite	Malzeme no.	P	S	C	Mn	Si	Al
STS410	—	max 0.035	max 0.035	max 0.3	0.3 - 1.4	0.1 - 0.35	—
STKM12C	—	max 0.04	max 0.04	max 0.2	max 0.6	max 0.35	—
SR240	—	max 0.05	max 0.05	—	—	—	—
SGDB	—	max 0.045	max 0.045	—	—	—	—
STKM14A	—	max 0.04	max 0.04	max 0.3	0.3 - 1	max 0.35	—
SD400	—	max 0.05	max 0.05	—	—	—	—
STK400	—	max 0.04	max 0.04	max 0.25	—	—	—
SGD4	—	max 0.045	max 0.045	0.2 - 0.25	0.3 - 0.6	—	—
STKM15C	—	max 0.04	max 0.04	0.25 - 0.35	0.3 - 1	max 0.35	—
SD600	—	—	—	—	—	—	—
SM490YA	—	max 0.035	max 0.035	max 0.2	max 1.6	max 0.55	—
SR235	—	max 0.05	max 0.05	—	—	—	—
STKM17C	—	max 0.04	max 0.04	0.45 - 0.55	0.4 - 1	max 0.4	—
SPS400	—	max 0.04	max 0.04	max 0.25	—	—	—
STAM290GA	—	max 0.035	max 0.035	max 0.12	max 0.6	max 0.35	—
SFB1	—	max 0.03	max 0.035	0.05 - 0.2	0.3 - 0.9	0.15 - 0.5	—
STKM19A	—	max 0.04	max 0.04	max 0.25	max 1.5	max 0.55	—
SWP400	—	max 0.04	max 0.04	max 0.25	—	—	—
STAM440G	—	max 0.035	max 0.035	max 0.25	0.3 - 0.9	max 0.35	—
SFB5	—	max 0.03	max 0.035	0.28 - 0.45	0.5 - 1.2	0.15 - 0.5	—
STC510A	—	max 0.04	max 0.04	max 0.25	0.3 - 0.9	max 0.35	—
SPPH380	—	max 0.035	max 0.035	max 0.25	0.3 - 1.1	0.1 - 0.35	—
STAM470H	—	max 0.035	max 0.035	max 0.25	0.3 - 0.9	max 0.35	—
SF390A	—	max 0.03	max 0.035	max 0.6	0.3 - 1.2	0.15 - 0.5	—
SRR235	—	max 0.03	max 0.02	max 0.27	max 1.9	max 0.55	max 0.01
SS490	—	max 0.05	max 0.05	—	—	—	—
SF590A	—	max 0.03	max 0.035	max 0.6	0.3 - 1.2	0.15 - 0.5	—
SN400B	—	max 0.03	max 0.015	max 0.22	0.6 - 1.5	max 0.35	—
STKR400	—	max 0.04	max 0.04	max 0.25	—	—	—
STW290	—	max 0.04	max 0.04	—	—	—	—
SWH400	—	max 0.03	max 0.015	max 0.2	max 1.4	max 0.35	—
STKN490B	—	max 0.03	max 0.015	max 0.22	max 1.6	max 0.55	—
STC540	—	max 0.04	max 0.04	max 0.25	max 1.6	max 0.55	—
STS370	—	max 0.035	max 0.035	max 0.25	0.3 - 1.1	0.1 - 0.35	—
STKM12B	—	max 0.04	max 0.04	max 0.2	max 0.6	max 0.35	—
SD490	—	max 0.04	max 0.04	max 0.32	max 1.8	max 0.55	—
SGDA	—	max 0.045	max 0.045	—	—	—	—
STKM13C	—	max 0.04	max 0.04	max 0.25	0.3 - 0.9	max 0.35	—
SD350	—	max 0.05	max 0.05	—	—	—	—
STK290	—	max 0.05	max 0.05	—	—	—	—
SGD3	—	max 0.045	max 0.045	0.15 - 0.2	0.3 - 0.6	—	—
STKM15A	—	max 0.04	max 0.04	0.25 - 0.35	0.3 - 1	max 0.35	—
SD500W	—	—	—	—	—	—	—
STK540	—	max 0.04	max 0.04	max 0.23	max 1.5	max 0.55	—
SNR490B	—	max 0.03	max 0.03	max 0.2	max 1.6	max 0.55	—
STKM17A	—	max 0.04	max 0.04	0.45 - 0.55	0.4 - 1	max 0.4	—
SPS290	—	max 0.05	max 0.05	—	—	—	—
SSC400	—	max 0.05	max 0.05	max 0.25	—	—	—
SD295B	—	max 0.04	max 0.04	max 0.27	max 1.5	max 0.55	—
STKM18C	—	max 0.04	max 0.04	max 0.18	max 1.5	max 0.55	—

Özellik aralıkları

21

Özellik	Birim	Min	Maks	Kaliteler
ReH	N/mm²	120	550	45
Rm	N/mm²	255	1050	182
A80	%	4	32	17
Re	N/mm²	165	700	145
A	%	5	41	151
A5	%	7	36	29
Z	%	18	68	23
aK	J/cm²	29	98	4
KCU	kJ/m²	240	780	6
HB	—	90	255	28
HV	—	100	105	3
rho	g/cm³	7.582	7.871	319
E	GPa	141	213	7
alpha	10^-6/K	11	15.6	6
lambda	W/(m·K)	27	76	6
cp	J/(kg·K)	466	875	6
rho_el	nΩ·m	140	1135	5
Ac1	°C	720	745	13
Ac3	°C	770	880	13
Ar3	°C	755	854	12
Ar1	°C	677	700	13

Bu kategoride kayıtlı değere sahip 319 kalite baz alınarak hesaplanmıştır.

Bileşim aralığı

15

Özellik	Birim	Min	Maks	Kaliteler
B	%	0.0008	0.005	1
C	%	0.004	0.6	318
N	%	0.0012	0.1	85
Al	%	0.01	0.06	38
Si	%	0.03	4.5	217
P	%	0.01	0.12	336
S	%	0.015	0.08	336
Ti	%	0.03	0.3	26
V	%	0.02	0.2	11
Cr	%	0.12	0.5	18
Mn	%	0.03	1.9	283
Ni	%	0.12	0.3	17
Cu	%	0.03	0.55	42
Nb	%	0.01	0.08	12
Mo	%	0.05	0.35	14

Bu kategoride kayıtlı değere sahip 336 kalite baz alınarak hesaplanmıştır.

Isıl işlem

3

İşlem	MinSıcaklık (°C)	MaksSıcaklık (°C)	Kaliteler
normalizing	—	—	4
annealing	—	—	3
tempering	—	—	1

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